Generalized Slow Roll for Large Power Spectrum Features (2009)
We develop a variant of the generalized slow roll approach for calculating the curvature power spectrum that is well-suited for order unity deviations in power caused by sharp features in the...
Cluster Constraints on f(R) Gravity (2009)
Schmidt, Fabian, Vikhlinin, Alexey, Hu, Wayne
Modified gravitational forces in models that seek to explain cosmic acceleration without dark energy typically predict deviations in the abundance of massive dark matter halos. We conduct the first,...
Hiding dark energy transitions at low redshift (2009)
Mortonson, Michael J., Hu, Wayne, Huterer, Dragan
We show that it is both observationally allowable and theoretically possible to have large fluctuations in the dark energy equation of state as long as they occur at ultra-low redshifts z
Evidence for horizon-scale power from CMB polarization (2009)
Mortonson, Michael J., Hu, Wayne
The CMB temperature power spectrum offers ambiguous evidence for the existence of horizon-scale power in the primordial power spectrum due to uncertainties in spatial curvature and the physics of...
Acceleration from Modified Gravity: Lessons from Worked Examples (2009)
I examine how two specific examples of modified gravity explanations of cosmic acceleration help us understand some general problems confronting cosmological tests of gravity: how do we distinguish...
The existence of relativistic stars in f(R) gravity (2009)
We refute recent claims in the literature that stars with relativistically deep potentials cannot exist in $f(R)$ gravity. Numerical examples of stable stars, including relativistic...
Cosmological Constraints on DGP Braneworld Gravity with Brane Tension (2009)
Lombriser, Lucas, Hu, Wayne, Fang, Wenjuan, Seljak, Uros
We perform a Markov Chain Monte Carlo analysis of the self-accelerating and normal branch of Dvali-Gabadadze-Porrati braneworld gravity. By adopting a parameterized post-Friedmann description of...
CMB polarization features from inflation versus reionization (2009)
Mortonson, Michael J., Dvorkin, Cora, Peiris, Hiranya V., Hu, Wayne
The angular power spectrum of the cosmic microwave background temperature anisotropy observed by WMAP has an anomalous dip at l~20 and bump at l~40. One explanation for this structure is the presence...
Observing the Evolution of the Universe (2009)
Aguirre, James, Amblard, Alexandre, Ashoorioon, Amjad, Baccigalupi, Carlo, Balbi, Amedeo, Bartlett, James, ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed...
B-mode CMB Polarization from Patchy Screening during Reionization (2009)
Dvorkin, Cora, Hu, Wayne, Smith, Kendrick M.
B-modes in CMB polarization from patchy reionization arise from two effects: generation of polarization from scattering of quadrupole moments by reionization bubbles, and fluctuations in the...
Estimation of the Hubble Constant and Constraint on Descriptions of Dark Energy (2009)
Greenhill, Lincoln, Humphreys, Elizabeth, Hu, Wayne, Macri, Lucas, Murphy, David, Masters, Karen, ...
Joint analysis of Cosmic Microwave Background, Baryon Acoustic Oscillation, and supernova data has enabled precision estimation of cosmological parameters. New programs will push to 1% uncertainty in...
3Department of Astronomy and Physics (2008)
Wayne Hu, Naoshi Sugiyama, Joseph Silk
Cosmic microwave background anisotropies provide a vast amount of cosmological information. Their full physical content and detailed structure can be understood in a simple and intuitive fashion...
IASSNS-AST-96/6 We study the uniqueness and robustness of acoustic signatures in the cosmic microwave background by allowing for the possibility that they are generated by some as yet unknown source...
Dark Energy Observables Making Light of the Dark Side (2008)
Wayne Hu, Christopher Gordon, Zoltan Haiman, Bhuvnesh Jain, Marcos Lima, Ryan Scranton, ...
• Dark matter simulations approaching the accuracy of CMB calculations
Temperature and Polarization Spectra (2008)
Ω De, Wayne Hu, Dragan Huterer, Manoj Kaplinghat, Michael Mortonson, Yong-seon Song, ...
reionization TE gravitational waves 10 100 1000 l (multipole) EE BB gravitational lensing Lensing of CMB Fields Gravitational Lensing • Lensing is a surface brightness conserving remapping of...
Concepts in CMB Anisotropy Formation (2008)
“To divide is to leave something undivided. To discriminate between alternatives is to leave something which is neither alternative.” Chuang-tzu These lecture notes form a primer on the theory of...
Non-linear Evolution of f(R) Cosmologies III: Halo Statistics (2008)
Schmidt, Fabian, Lima, Marcos, Oyaizu, Hiroaki, Hu, Wayne
The statistical properties of dark matter halos, the building blocks of cosmological observables associated with structure in the universe, offer many opportunities to test models for cosmic...
Falsifying Paradigms for Cosmic Acceleration (2008)
Mortonson, Michael J., Hu, Wayne, Huterer, Dragan
Consistency relations between growth of structure and expansion history observables exist for any physical explanation of cosmic acceleration, be it a cosmological constant, scalar field...
Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy (2008)
Fang, Wenjuan, Hu, Wayne, Lewis, Antony
Dark energy models with a single scalar field cannot cross the equation of state divide set by a cosmological constant. More general models that allow crossing require additional degrees of freedom...
Challenges to the DGP Model from Horizon-Scale Growth and Geometry (2008)
Fang, Wenjuan, Wang, Sheng, Hu, Wayne, Haiman, Zoltan, Hui, Lam, May, Morgan
We conduct a Markov Chain Monte Carlo study of the Dvali-Gabadadze-Porrati (DGP) self-accelerating braneworld scenario given the cosmic microwave background (CMB) anisotropy, supernovae and Hubble...
ABSTRACT: Cosmic microwave background (CMB) temperature anisotropies have and will continue to revolutionize our understanding of cosmology. The recent discovery of the previously predicted acoustic...
Non-linear evolution of f(R) cosmologies II: power spectrum (2008)
Oyaizu, Hiroaki, Lima, Marcos, Hu, Wayne
We carry out a suite of cosmological simulations of modified action f(R) models where cosmic acceleration arises from an alteration of gravity instead of dark energy. These models introduce an extra...
Reionization constraints from five-year WMAP data (2008)
Mortonson, Michael J., Hu, Wayne
We study the constraints on reionization from five years of WMAP data, parametrizing the evolution of the average fraction of ionized hydrogen with principal components that provide a complete basis...
Lecture Notes on CMB Theory: From Nucleosynthesis to Recombination (2008)
These lecture notes comprise an informal but pedagogical introduction to the well established physics and phenomenology of the cosmic microwave background (CMB) between big bang nucleosynthesis and...
Parametrized Post-Friedmann Signatures of Acceleration in the CMB (2008)
We extend the covariant, parametrized post-Friedmann treatment of cosmic acceleration from modified gravity to an arbitrary admixture of matter, radiation, relativistic components and spatial...
The Effect of Physical Assumptions on the Calculation of Microwave Background Anisotropies (2007)
Wayne Hu, Douglas Scott, Naoshi Sugiyama, Martin White
this paper, we have set about studying the various assumptions which go into these calculations. For most of the issues, there is a very definite correct choice in order to obtain the most accurate...
Can Baryonic Features Produce the Observed (2007)
Gamma Mpc, Mpc Clustering, Daniel J. Eisenstein, Wayne Hu, Joseph Silk, Alexander S. Szalay
We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100h \Gamma1 Mpc scales. The observed...
Testable polarization predictions for models of CMB isotropy anomalies (2007)
Dvorkin, Cora, Peiris, Hiranya V., Hu, Wayne
Anomalies in the large-scale CMB temperature sky measured by WMAP have been suggested as possible evidence for a violation of statistical isotropy on large scales. In any physical model for broken...
Impact of reionization on CMB polarization tests of slow-roll inflation (2007)
Mortonson, Michael J., Hu, Wayne
Estimates of inflationary parameters from the CMB B-mode polarization spectrum on the largest scales depend on knowledge of the reionization history, especially at low tensor-to-scalar ratio....
Zentner, Andrew R., Rudd, Douglas H., Hu, Wayne
Numerical studies indicate that uncertainties in the treatment of baryonic physics can affect predictions for shear power spectra at a level that is significant for forthcoming surveys such as DES,...
Photometric Redshift Requirements for Self-Calibration of Cluster Dark Energy Studies (2007)
The ability to constrain dark energy from the evolution of galaxy cluster counts is limited by the imperfect knowledge of cluster redshifts. Ongoing and upcoming surveys will mostly rely on redshifts...
CMB Cluster Lensing: Cosmography with the Longest Lever Arm (2007)
Hu, Wayne, Holz, Daniel E., Vale, Chris
We discuss combining gravitational lensing of galaxies and the cosmic microwave background (CMB) by clusters to measure cosmographic distance ratios, and hence dark energy parameters. Advantages to...
A Parameterized Post-Friedmann Framework for Modified Gravity (2007)
We develop a parameterized post-Friedmann (PPF) framework which describes three regimes of modified gravity models that accelerate the expansion without dark energy. On large scales, the evolution of...
Cosmological Constraints on f(R) Acceleration Models (2007)
Song, Yong-Seon, Peiris, Hiranya, Hu, Wayne
Models which accelerate the expansion of the universe through the addition of a function of the Ricci scalar f(R) leave a characteristic signature in the large-scale structure of the universe at the...
Model-independent constraints on reionization from large-scale CMB polarization (2007)
Mortonson, Michael J., Hu, Wayne
On large angular scales, the polarization of the CMB contains information about the evolution of the average ionization during the epoch of reionization. Interpretation of the polarization spectrum...
Models of f(R) Cosmic Acceleration that Evade Solar-System Tests (2007)
We study a class of metric-variation f(R) models that accelerates the expansion without a cosmological constant and satisfies both cosmological and solar-system tests in the small-field limit of the...
Stability of Cosmological Solution in f(R) Models of Gravity (2007)
We reconcile seemingly conflicting statements in the literature about the behavior of cosmological solutions in modified theories of gravity where the Einstein-Hilbert Lagrangian for gravity is...
Cluster Mass Estimators from CMB Temperature and Polarization Lensing (2007)
Hu, Wayne, DeDeo, Simon, Vale, Chris
Upcoming Sunyaev-Zel'dovich surveys are expected to return ~10^4 intermediate mass clusters at high redshift. Their average masses must be known to same accuracy as desired for the dark energy...
Weak gravitational lensing by the intervening large-scale structure of the Universe induces high-order correlations in the cosmic microwave background (CMB) temperature and polarization fields. We...
Michael J. Mortonson, Wayne Hu
On large angular scales, the polarization of the CMB contains information about the evolution of the average ionization during the epoch of reionization. Interpretation of the polarization spectrum...
The Large Scale Structure of f(R) Gravity (2006)
Song, Yong-Seon, Hu, Wayne, Sawicki, Ignacy
We study the evolution of linear cosmological perturbations in f(R) models of accelerated expansion in the physical frame where the gravitational dynamics are fourth order and the matter is minimally...
Report of the Dark Energy Task Force (2006)
Albrecht, Andreas, Bernstein, Gary, Cahn, Robert, Freedman, Wendy L., Hewitt, Jacqueline, Hu, Wayne, ...
Dark energy appears to be the dominant component of the physical Universe, yet there is no persuasive theoretical explanation for its existence or magnitude. The acceleration of the Universe is,...
Mortonson, Michael J., Hu, Wayne
We compute the B-mode polarization power spectrum of the CMB from an epoch of inhomogeneous reionization, using a simple model in which HII regions are represented by ionized spherical bubbles with a...
Cosmological Information from Lensed CMB Power Spectra (2006)
Smith, Kendrick M., Hu, Wayne, Kaplinghat, Manoj
Gravitational lensing distorts the cosmic microwave background (CMB) temperature and polarization fields and encodes valuable information on distances and growth rates at intermediate redshifts into...
Supernovae, Lensed CMB and Dark Energy (2006)
Hu, Wayne, Huterer, Dragan, Smith, Kendrick M.
Supernova distance and primary CMB anisotropy measurements provide powerful probes of the dark energy evolution in a flat universe but degrade substantially once curvature is marginalized. We show...
Near-Horizon Solution for DGP Perturbations (2006)
Sawicki, Ignacy, Song, Yong-Seon, Hu, Wayne
We develop a scaling ansatz for the master equation in Dvali, Gabadadze, Porrati cosmologies, which allows us to solve the equations of motion for perturbations off the brane during periods when the...
Large-Scale Tests of the DGP Model (2006)
Song, Yong-Seon, Sawicki, Ignacy, Hu, Wayne
The self-accelerating braneworld model (DGP) can be tested from measurements of the expansion history of the universe and the formation of structure. Current constraints on the expansion history from...
Likelihood Methods for Cluster Dark Energy Surveys (2006)
Galaxy cluster counts at high redshift, binned into spatial pixels and binned into ranges in an observable proxy for mass, contain a wealth of information on both the dark energy equation of state...
Wayne Hu, Dragan Huterer, Kendrick M. Smith
Supernova distance and primary CMB anisotropy measurements provide powerful probes of the dark energy evolution in a flat universe but degrade substantially once curvature is marginalized. We show...
Michael J. Mortonson, Wayne Hu
We compute the B-mode polarization power spectrum of the CMB from an epoch of inhomogeneous reionization, using a simple model in which H II regions are represented by ionized spherical bubbles with...
Redshift space 21 cm power spectra from reionization (2005)
We construct a simple but self-consistent analytic ionization model for rapid exploration of 21cm power spectrum observables in redshift space. It is fully described by the average ionization...
Spontaneous Isotropy Breaking: A Mechanism for CMB Multipole Alignments (2005)
Gordon, Christopher, Hu, Wayne, Huterer, Dragan, Crawford, Tom
We introduce a class of models in which statistical isotropy is broken spontaneously in the CMB by a non-linear response to long-wavelength fluctuations in a mediating field. These fluctuations...
Constraints on supernovae dimming from photon-pseudo scalar coupling (2005)
An alternative mechanism that dims high redshift supernovae without cosmic acceleration utilizes an oscillation of photons into a pseudo-scalar particle during transit. Since angular diameter...
Effect of Photometric Redshift Uncertainties on Weak Lensing Tomography (2005)
Ma, Zhaoming, Hu, Wayne, Huterer, Dragan
We perform a systematic analysis of the effects of photometric redshift uncertainties on weak lensing tomography. We describe the photo-z distribution with a bias and Gaussian scatter that are...
Weighing Neutrinos with Galaxy Cluster Surveys (2005)
Wang, Sheng, Haiman, Zoltan, Hu, Wayne, Khoury, Justin, May, Morgan
Large future galaxy cluster surveys, combined with cosmic microwave background observations, can achieve a high sensitivity to the masses of cosmologically important neutrinos. We show that a weak...
Kadota, Kenji, Dodelson, Scott, Hu, Wayne, Stewart, Ewan D.
Through a principal component analysis, we study how accurately CMB observables can constrain inflaton potentials in a model independent manner. We apply the general slow-roll approximation in our...
Self-Calibration of Cluster Dark Energy Studies: Observable-Mass Distribution (2005)
The exponential sensitivity of cluster number counts to the properties of the dark energy implies a comparable sensitivity to not only the mean but also the actual_distribution_ of an observable mass...
Challenges for Kinetic Unified Dark Matter (2005)
Giannakis, Dimitrios, Hu, Wayne
Given that the dark matter and dark energy in the universe affect cosmological observables only gravitationally, their phenomenology may be described by a single stress energy tensor. True...
We construct a simple but self-consistent analytic ionization model for rapid exploration of 21cm power spectrum observables in redshift space. It is fully described by the average ionization...
Zhaoming Ma, Wayne Hu, Dragan Huterer
We perform a general analysis of the effects of photometric redshift uncertainties on weak lensing tomography. We describe the photo-z distribution with a bias and Gaussian scatter that are allowed...
Crossing the Phantom Divide: Dark Energy Internal Degrees of Freedom (2004)
Dark energy constraints have forced viable alternatives that differ substantially from a cosmological constant Lambda to have an equation of state w that evolves across the phantom divide set by...
Measuring Dark Energy Clustering with CMB-Galaxy Correlations (2004)
The integrated Sachs-Wolfe (ISW) effect in the cosmic microwave background (CMB) as measured through its correlation with galaxies provides a unique opportunity to study the dynamics of the dark...
Dark Energy Probes in Light of the CMB (2004)
CMB observables have largely fixed the expansion history of the universe in the deceleration regime and provided two self-calibrated absolute standards for dark energy studies: the sound horizon at...
A Low CMB Quadrupole from Dark Energy Isocurvature Perturbations (2004)
Gordon, Christopher, Hu, Wayne
We explicate the origin of the temperature quadrupole in the adiabatic dark energy model and explore the mechanism by which scale invariant isocurvature dark energy perturbations can lead to its...
Weak Lensing of the CMB: Sampling Errors on B-Modes (2004)
Smith, Kendrick M., Hu, Wayne, Kaplinghat, Manoj
The B modes generated by the lensing of CMB polarization are a primary target for the upcoming generation of experiments and can potentially constrain quantities such as the neutrino mass and dark...
Covariant Linear Perturbation Formalism (2004)
Lecture notes on covariant linear perturbation theory and its applications to inflation, dark energy or matter and the cosmic microwave background.
Self-Calibration of Cluster Dark Energy Studies: Counts in Cells (2004)
Cluster number counts can constrain the properties of dark energy if and only if the evolution in the relationship between observable quantities and the cluster mass can be calibrated. Next...
Wayne Hu, Christopher Gordon, Matt Hedman, Gil Holder, Manoj Kaplinghat, Kendrick Smith, ...
gravitational waves 10 100 1000 l (multipole)
Joint Galaxy-Lensing Observables and the Dark Energy (2003)
Deep multi-color galaxy surveys with photometric redshifts will provide a large number of two-point correlation observables: galaxy-galaxy angular correlations, galaxy-shear cross correlations, and...
Principal Power of the CMB (2003)
We study the physical limitations placed on CMB temperature and polarization measurements of the initial power spectrum by geometric projection, acoustic physics, gravitational lensing and the joint...
Redshifting Rings of Power (2003)
The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two...
Model-Independent Reionization Observables in the CMB (2003)
We represent the reionization history of the universe as a free function in redshift and study the potential for its extraction from CMB polarization spectra. From a principal component analysis, we...
Self-Consistency and Calibration of Cluster Number Count Surveys for Dark Energy (2003)
Cluster number counts offer sensitive probes of the dark energy if and only if the_evolution_ of the cluster mass versus observable relation(s) is well calibrated. We investigate the potential for...
CMB Lensing Reconstruction on the Full Sky (2003)
Gravitational lensing of the microwave background by the intervening dark matter mainly arises from large-angle fluctuations in the projected gravitational potential and hence offers a unique...
CMB Temperature and Polarization Anisotropy Fundamentals (2003)
Abstract. The tremendous experimental progress in cosmic microwave background (CMB) temperature and polarization anisotropy studies over the last few years has helped establish a standard paradigm...
CMB Temperature and Polarization Anisotropy Fundamentals (2002)
The tremendous experimental progress in cosmic microwave background (CMB) temperature and polarization anisotropy studies over the last few years has helped establish a standard paradigm for...
Benchmark Parameters for CMB Polarization Experiments (2002)
Hu, Wayne, Hedman, Matthew M., Zaldarriaga, Matias
The recently detected polarization of the cosmic microwave background (CMB) holds the potential for revealing the physics of inflation and gravitationally mapping the large-scale structure of the...
Dark Energy and Matter Evolution from Lensing Tomography (2002)
Reconstructed from lensing tomography, the evolution of the dark matter density field in the well-understood linear regime can provide model-independent constraints on the growth function of...
The Angular Trispectra of CMB Temperature and Polarization (2002)
We develop the formalism necessary to study four-point functions of the cosmic microwave background (CMB) temperature and polarization fields. We determine the general form of CMB trispectra, with...
Three-Dimensional Mapping of the Dark Matter (2002)
We study the prospects for three-dimensional mapping of the dark matter to high redshift through the shearing of faint galaxies images at multiple distances by gravitational lensing. Such maps could...
Sample Variance Considerations for Cluster Surveys (2002)
Hu, Wayne, Kravtsov, Andrey V.
We present a general statistical framework for describing the effect of sample variance in the number counts of virialized objects and examine its effect on cosmological parameter estimation....
Second Order Corrections to Weak Lensing by Large-Scale Structure (2002)
We calculate corrections to the power spectrum predictions of weak lensing by large scale structure due to higher order effects in the gravitational potential. Using a perturbative approach to third...
Wayne Hu, Matt Hedman, Joe Silk, Martin White, Matias Zaldarriaga, Matt Hedman, ...
• Damping tail of temperature power spectrum and its use as a standard ruler • Generation of polarization through damping • Unveiling of gravitational lensing from features in the damping tail...
We calculate corrections to the power spectrum predictions of weak lensing by large scale structure due to higher order effects in the gravitational potential. Using a perturbative approach to third...
Covariant Linear Perturbation Formalism (2002)
LNS Lecture notes on covariant linear perturbation theory and its applications to inflation, dark energy or matter and the cosmic microwave background. Keywords:
Mass Reconstruction with CMB Polarization (2001)
Weak gravitational lensing by the intervening large-scale structure of the Universe induces high-order correlations in the cosmic microwave background (CMB) temperature and polarization fields. We...
Cosmic Microwave Background Anisotropies (2001)
Cosmic microwave background (CMB) temperature anisotropies have and will continue to revolutionize our understanding of cosmology. The recent discovery of the previously predicted acoustic peaks in...
Dark Synergy: Gravitational Lensing and the CMB (2001)
Power spectra and cross-correlation measurements from the weak gravitational lensing of the cosmic microwave background (CMB) and the cosmic shearing of faint galaxies images will help shed light on...
Mapping the Dark Matter through the CMB Damping Tail (2001)
The lensing of CMB photons by intervening large-scale structure leaves a characteristic imprint on its arcminute-scale anisotropy that can be used to map the dark matter distribution in projection on...
The Angular Trispectrum of the CMB (2001)
We study the general properties of the CMB temperature four-point function, specifically its harmonic analogue the angular trispectrum, and illustrate its utility in finding optimal quadratic...
Measuring Angular Diameter Distances through Halo Clustering (2001)
Cooray, Asantha, Hu, Wayne, Huterer, Dragan, Joffre, Michael
Current and upcoming wide-field surveys for weak gravitational lensing and the Sunyaev-Zel'dovich effect will generate mass-selected catalogues of dark matter halos with internal or followup...
The lensing of cosmic microwave background (CMB) photons by intervening large-scale structure leaves a characteristic imprint on its arcminute-scale anisotropy that can be used to map the dark matter...
Asantha Cooray, Wayne Hu, Dragan Huterer, Michael Joffre
Current and upcoming wide-field surveys for weak gravitational lensing and the Sunyaev-Zeldovich effect will generate mass-selected catalogs of dark matter halos with internal or follow-up...
We develop a method for estimating the shear power spectra from weak-lensing observations and test it on simulated data. Our method describes the shear Ðeld in terms of angular power spectra and the...
Power Spectrum Covariance of Weak Gravitational Lensing (2000)
Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them. At low redshifts, the non-linear gravitational...
Power Spectra Estimation for Weak Lensing (2000)
We develop a method for estimating the shear power spectra from weak lensing observations and test it on simulated data. Our method describes the shear field in terms of angular power spectra and...
Gravitational Time Delay Effects on CMB Anisotropies (2000)
We study the effect of gravitational time delay on the power spectra and bispectra of the cosmic microwave background (CMB) temperature and polarization anisotropies. The time delay effect modulates...
CMB Observables and Their Cosmological Implications (2000)
Hu, Wayne, Fukugita, Masataka, Zaldarriaga, Matias, Tegmark, Max
We show that recent measurements of the power spectrum of cosmic microwave background anisotropies by BOOMERanG and MAXIMA can be characterized by four observables, the position of the first acoustic...
Peebles, P. J. E., Seager, Sara, Hu, Wayne
Under the standard model for recombination of the primeval plasma, and the cold dark matter model for structure formation, recent measurements of the first peak in the angular power spectrum of the...
Weak Gravitational Lensing Bispectrum (2000)
Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them. The non-linear evolution of large scale structure...
Cold and Fuzzy Dark Matter (2000)
Hu, Wayne, Barkana, Rennan, Gruzinov, Andrei
Cold dark matter (CDM) models predict small-scale structure in excess of observations of the cores and abundance of dwarf galaxies. These problems might be solved, and the virtues of CDM models...
Weak Lensing by Large-Scale Structure: A Dark Matter Halo Approach (2000)
Cooray, Asantha, Hu, Wayne, Miralda-Escude, Jordi
Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them but are currently limited to small fields and...
CMB Anisotropies: A Decadal Survey (2000)
We review the theoretical implications of the past decade of CMB anisotropy measurements, which culminated in the recent detection of the first feature in the power spectrum, and discuss the tests...
Cooray, Asantha, Hu, Wayne, Tegmark, Max
We study the prospects for extracting detailed statistical properties of the Sunyaev-Zel'dovich (SZ) effect associated with large scale structure using upcoming multifrequency CMB experiments. The...
Weak Lensing of the CMB: A Harmonic Approach (2000)
Weak lensing of CMB anisotropies and polarization for the power spectra and higher order statistics can be handled directly in harmonic-space without recourse to real-space correlation functions. For...
Under the standard model for recombination of the primeval plasma and the cold dark matter model for structure formation, recent measurements of the first peak in the angular power spectrum of the...
Asantha Cooray, Wayne Hu, Jordi Miralda-escudé
Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters that govern them, but they are currently limited to small fields and...
Wayne Hu, Masataka Fukugita, Matias Zaldarriaga, Max Tegmark
We show that recent measurements of the power spectrum of cosmic microwave background anisotropies by Boomerang and MAXIMA can be mainly characterized by four observables: the position of the Ðrst...
This model assumes the baryons, radiation, three families of massless neutrinos, and cold dark matter were mutually thermalized before the baryon number was fixed, primeval curvature fluctuations...
Asantha Cooray, Wayne Hu, Max Tegmark
We study the prospects for extracting detailed statistical properties of the Sunyaev-Zeldovich (SZ) e†ect associated with large-scale structure using upcoming multifrequency cosmic microwave...
Weak gravitational lensing observations probe the spectrum and evolution of density Ñuctuations and the cosmological parameters that govern them. At low redshifts, the nonlinear gravitational...
Imprint of Reionization on the Cosmic Microwave Background Bispectrum (1999)
We study contributions to the cosmic microwave background (CMB) bispectrum from non-Gaussianity induced by secondary anisotropies during reionization. Large-scale structure in the reionized epoch...
A Model for Structure Formation Seeded by Gravitationally Produced Matter (1999)
This model assumes the baryons, radiation, three families of massless neutrinos, and cold dark matter were mutually thermalized before the baryon number was fixed, primeval curvature fluctuations...
A New Algorithm for Computing Statistics of Weak Lensing by Large-Scale Structure (1999)
We describe an efficient algorithm for calculating the statistics of weak lensing by large-scale structure based on a tiled set of independent particle-mesh N-body simulations which telescope in...
Reionization Revisited: Secondary CMB Anisotropies and Polarization (1999)
Secondary CMB anisotropies and polarization provide a laboratory to study structure formation in the reionized epoch. We consider the kinetic Sunyaev-Zel'dovich effect from mildly nonlinear...
Foregrounds and Forecasts for the Cosmic Microwave Background (1999)
Tegmark, Max, Eisenstein, Daniel J., Hu, Wayne
One of the main challenges facing upcoming CMB experiments will be to distinguish the cosmological signal from foreground contamination. We present a comprehensive treatment of this problem and study...
Power Spectrum Tomography with Weak Lensing (1999)
Upcoming weak lensing surveys on wide fields will provide the opportunity to reconstruct the structure along the line of sight tomographically by employing photometric redshift information about the...
Cosmological Limits on the Neutrino Mass from the Lya Forest (1999)
Croft, Rupert A. C., Hu, Wayne, Dave', Romeel
The Lya forest in quasar spectra probes scales where massive neutrinos can strongly suppress the growth of mass fluctuations. Using hydrodynamic simulations with massive neutrinos, we successfully...
We study contributions to the cosmic microwave background (CMB) bispectrum from non-Gaussianity induced by secondary anisotropies during reionization. Large-scale structure in the reionized epoch...
Max Tegmark, Daniel J. Eisenstein, Wayne Hu
One of the main challenges facing upcoming cosmic microwave background (CMB) experiments will be to distinguish the cosmological signal from foreground contamination. We present a comprehensive...
REIONIZATION REVISITED: SECONDARY COSMIC MICROWAVE BACKGROUND ANISOTROPIES AND POLARIZATION (1999)
Secondary cosmic microwave background (CMB) anisotropies and polarization provide a laboratory for studying structure formation in the reionized epoch. We consider the kinetic Sunyaev-Zeldovich...
Upcoming weak lensing surveys on wide fields will provide the opportunity to reconstruct the structure along the line of sight tomographically by employing photometric redshift information about the...
Weak lensing of galaxies by large-scale structure can potentially measure cosmological quantities as accurately as the cosmic microwave background (CMB). However, the relation between observables and...
A NEW ALGORITHM FOR COMPUTING STATISTICS OF WEAK LENSING BY LARGE-SCALE STRUCTURE (1999)
We describe an efficient algorithm for calculating the statistics of weak lensing by large-scale structure based on a tiled set of independent particle-mesh N-body simulations that telescope in...
Weak Lensing: Prospects for Measuring Cosmological Parameters (1998)
Weak lensing of galaxies by large scale structure can potentially measure cosmological quantities as accurately as the cosmic microwave background (CMB). However, the relation between observables and...
The Structure of Structure Formation Theories (1998)
Hu, Wayne, Eisenstein, Daniel J.
We study the general structure of models for structure formation, with applications to the reverse engineering of the model from observations. Through a careful accounting of the degrees of freedom...
An Isocurvature Mechanism for Structure Formation (1998)
We examine a novel mechanism for structure formation involving initial number density fluctuations between relativistic species, one of which then undergoes a temporary downward variation in its...
Cosmic Complementarity: Joint Parameter Estimation from CMB Experiments and Redshift Surveys (1998)
Eisenstein, Daniel J., Hu, Wayne, Tegmark, Max
We study the ability of future CMB anisotropy experiments and redshift surveys to constrain a thirteen-dimensional parameterization of the adiabatic cold dark matter model. Each alone is unable to...
Observationally Determining the Properties of Dark Matter (1998)
Hu, Wayne, Eisenstein, Daniel J., Tegmark, Max, White, Martin
Determining the properties of the dark components of the universe remains one of the outstanding challenges in cosmology. We explore how upcoming CMB anisotropy measurements, galaxy power spectrum...
Cosmic Complementarity: H_0 and Omega_m from Combining CMB Experiments and Redshift Surveys (1998)
Eisenstein, Daniel J., Hu, Wayne, Tegmark, Max
We show that upcoming CMB satellite experiments and large redshift surveys can be used together to yield 5% determinations of H_0 and Omega_m, an order of magnitude improvement over CMB data alone....
Cosmic complementarity: probing the acceleration of the Universe (1998)
Tegmark, Max, Eisenstein, Daniel J., Hu, Wayne, Kron, Richard
We assess the accuracy with which Omega and Lambda can be measured by combining various types of upcoming experiments. Useful expressions for the Fisher information matrix are derived for classical...
Cosmic complementarity: combining CMB and supernova observations (1998)
Tegmark, Max, Eisenstein, Daniel J., Hu, Wayne
We compute the accuracy with which Omega and Lambda can be measured by combining future SN Ia and CMB experiments, deriving a handy expression for the SN Ia Fisher information matrix. The two data...
Secondary CMB anisotropies in a universe reionized in patches (1998)
In a universe reionized in patches, the Doppler effect from Thomson scattering off free electrons generates secondary cosmic microwave background (CMB) anisotropies. For a simple model with small...
Structure Formation with Generalized Dark Matter (1998)
The next generation of cosmic microwave background (CMB) experiments, galaxy surveys, and high-redshift observations can potentially determine the nature of the dark matter observationally. With this...
Max Tegmark, Daniel J. Eisenstein, Wayne Hu, Richard G. Kron
We assess the accuracy with which Ωm and ΩΛ can be measured by combining various types of upcoming experiments. Useful expressions for the Fisher information matrix are derived for classical...
The next generation of cosmic microwave background (CMB) experiments, galaxy surveys, and highredshift observations can potentially determine the nature of the dark matter observationally. With this...
Daniel J. Eisenstein, Wayne Hu, Joseph Silk, Er S. Szalay
We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100 h�1 Mpc scales. The observed location...
SECONDARY COSMIC MICROWAVE BACKGROUND ANISOTROPIES IN A UNIVERSE REIONIZED IN PATCHES (1998)
In a universe reionized in patches, the Doppler e†ect from Thomson scattering o † free electrons generates secondary cosmic microwave background (CMB) anisotropies. For a simple model with small...
Weighing Neutrinos with Galaxy Surveys (1997)
Hu, Wayne, Eisenstein, Daniel J., Tegmark, Max
We show that galaxy redshift surveys sensitively probe the neutrino mass, with eV mass neutrinos suppressing power by a factor of two. The Sloan Digital Sky Survey can potentially detect $N$ nearly...
Can Baryonic Features Produce the Observed 100 Mpc Clustering? (1997)
Eisenstein, Daniel J., Hu, Wayne, Silk, Joseph, Szalay, Alex
We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100h^-1 Mpc scales. The observed location...
Power Spectra for Cold Dark Matter and its Variants (1997)
Eisenstein, Daniel J., Hu, Wayne
The bulk of recent cosmological research has focused on the adiabatic cold dark matter model and its simple extensions. Here we present an accurate fitting formula that describes the matter transfer...
Small Scale Perturbations in a General MDM Cosmology (1997)
Hu, Wayne, Eisenstein, Daniel J.
For a universe with massive neutrinos, cold dark matter, and baryons, we solve the linear perturbation equations analytically in the small-scale limit and find agreement with numerical codes at the...
Baryonic Features in the Matter Transfer Function (1997)
Eisenstein, Daniel J., Hu, Wayne
We provide scaling relations and fitting formulae for adiabatic cold dark matter cosmologies that account for all baryon effects in the matter transfer function to better than 10% in the large-scale...
A Complete Treatment of CMB Anisotropies in a FRW Universe (1997)
Hu, Wayne, Seljak, Uros, White, Martin, Zaldarriaga, Matias
We generalize the total angular momentum method for computing Cosmic Microwave Background anisotropies to Friedman-Robertson-Walker (FRW) spaces with arbitrary geometries. This unifies the treatment...
A CMB Polarization Primer (1997)
We present a pedagogical and phenomenological introduction to the study of cosmic microwave background (CMB) polarization to build intuition about the prospects and challenges facing its detection....
CMB Anisotropies: Total Angular Momentum Method (1997)
A total angular momentum representation simplifies the radiation transport problem for temperature and polarization anisotropy in the CMB. Scattering terms couple only the quadrupole moments of the...
Tensor Anisotropies in an Open Universe (1997)
We calculate the anisotropies in the cosmic microwave background induced by long-wavelength primordial gravitational waves in a universe with negative spatial curvature, such as are produced in the...
Daniel J. Eisenstein, Wayne Hu
We provide scaling relations and Ðtting formulae for adiabatic cold dark matter cosmologies that account for all baryon e†ects in the matter transfer function to better than 10 % in the...
A CMB polarization primer (1997)
We present a pedagogical and phenomenological introduction to the study of cosmic microwave background (CMB) polarization to build intuition about the prospects and challenges facing its detection....
Wayne Hu, Martin White, Communicated David, N. Schramm
We present a pedagogical and phenomenological introduction to the study of cosmic microwave background (CMB) polarization to build intuition about the prospects and challenges facing its detection....
We calculate the anisotropies in the cosmic microwave background induced by long-wavelength primordial gravitational waves in a universe with negative spatial curvature, such as are produced in the...
For a universe with massive neutrinos, cold dark matter, and baryons, we solve the linear perturbation equations analytically in the small-scale limit and Ðnd agreement with numerical codes at the...
Daniel J. Eisenstein, Wayne Hu
The bulk of recent cosmological research has focused on the adiabatic cold dark matter model and its simple extensions. Here we present an accurate Ðtting formula that describes the matter transfer...
Can Baryonic Features Produce the Observed 100h -1 Mpc Clustering? (1997)
Daniel J. Eisenstein, Wayne Hu, Joseph Silk, Alexander S. Szalay
We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100h -1 Mpc scales. The observed location...
We present a pedagogical derivation of the Sachs-Wolfe effect, specifically the factor 1/3 relating the temperature fluctuations to gravitational potentials. The result arises from a cancellation...
The Damping Tail of CMB Anisotropies (1996)
By decomposing the damping tail of CMB anisotropies into a series of transfer functions representing individual physical effects, we provide ingredients that will aid in the reconstruction of the...
Testing Inflation with Small Scale CMB Anisotropies (1996)
We discuss ability of the harmonic pattern of peaks in the CMB angular power spectrum to test inflation. By studying robust features of alternate models, which must all be isocurvature in nature, we...
Measuring the Curvature of the Universe (1996)
We discuss how the curvature of the universe can be robustly measured employing only the gross features of the CMB anisotropy spectrum. Though the position of the first peak is not robust,...
Distinguishing Causal Seeds from Inflation (1996)
Hu, Wayne, Spergel, David N., White, Martin
Causal seed models, such as cosmological defects, generically predict a distinctly different structure to the CMB power spectrum than inflation, due to the behavior of the perturbations outside the...
The Physics of Microwave Background Anisotropies (1996)
Hu, Wayne, Sugiyama, Naoshi, Silk, Joseph
Cosmic microwave background anisotropies provide a vast amount of cosmological information. Their full physical content and detailed structure can be understood in a simple and intuitive fashion...
Acoustic Signatures in the Cosmic Microwave Background (1996)
We study the uniqueness and robustness of acoustic signatures in the cosmic microwave background by allowing for the possibility that they are generated by some as yet unknown source of gravitational...
A New Test of Inflation (1996)
We discuss a new test of inflation from the harmonic pattern of peaks in the cosmic microwave background radiation angular power spectrum. By characterizing the features of alternate models and...
AND ASTROPHYSICS The Sachs-Wolfe effect (1996)
Abstract. We present a pedagogical derivation of the Sachs-Wolfe effect, specifically the factor 1 3 relating the temperature fluctuations to gravitational potentials. The result arises from a...
Acoustic signatures in the cosmic microwave background (1996)
We study the uniqueness and robustness of acoustic signatures in the cosmic microwave background by allowing for the possibility that they are generated by some as yet unknown source of gravitational...
By decomposing the damping tail of cosmic microwave background (CMB) anisotropies into a series of transfer functions representing individual physical e†ects, we provide ingredients that will aid...
Concepts in CMB Anisotropy Formation (1995)
These lecture notes form a primer on the theory of cosmic microwave background (CMB) anisotropy formation. With emphasis on conceptual aspects rather than technical issues, we examine the physical...
Small Scale Cosmological Perturbations: An Analytic Approach (1995)
Through analytic techniques verified by numerical calculations, we establish general relations between the matter and cosmic microwave background (CMB) power spectra and their dependence on...
Wandering in the Background: A CMB Explorer (1995)
We develop and examine the principles governing the formation of distortions in the cosmic microwave background. Distortions in the frequency or spectral distribution of the background probe the...
CMB Anisotropies in the Weak Coupling Limit (1995)
We present a new, more powerful and accurate, analytic treatment of cosmic microwave background (CMB) anisotropies in the weakly coupled regime. Three applications are presented: gravitational...
The Effect of Physical Assumptions on the Calculation of Microwave Background Anisotropies (1995)
Hu, Wayne, Scott, Douglas, Sugiyama, Naoshi, White, Martin
As the data on CMB anisotropies improve and potential cosmological applications are realized, it will be increasingly important for theoretical calculations to be as accurate as possible. All modern...
The Physics of Microwave Background Anisotropies (1995)
Hu, Wayne, Sugiyama, Naoshi, Silk, Joseph
Cosmic microwave background anisotropies provide a vast amount of information on both structure formation in the universe and the background dynamics and geometry. The full physical content and...
COBE Constraints on Baryon Isocurvature Models (1995)
Hu, Wayne, Bunn, Emory F., Sugiyama, Naoshi
We consider Bayesian constraints on standard isocurvature baryon models from the slope and normalization of the anisotropy power spectrum detected by the COBE DMR experiment in their two year maps....
We consider Bayesian constraints on standard isocurvature baryon models from the slope and normalization of the anisotropy power spectrum detected by the COBE DMR experiment in their 2 year maps. In...
Wandering in the background: A Cosmic microwave background explorer (1995)
Wayne Hu, Wayne T. Hu, Wayne T. Hu
We develop and examine the principles governing the formation of distortions in the cos-mic microwave background. Perturbations in the frequency or spectral distribution of the background probe the...
Through analytic techniques veriÐed by numerical calculations, we establish general relations between the matter and cosmic microwave background (CMB) power spectra and their dependence on...
Toward Understanding CMB Anisotropies and Their Implications (1994)
Working toward a model independent understanding of cosmic microwave background (CMB) anisotropies and their significance, we undertake a comprehensive and self-contained study of scalar perturbation...
Anisotropies in the Cosmic Microwave Background: An Analytic Approach (1994)
We introduce a simple yet powerful {\it analytic} method which obtains the structure of cosmic microwave background anisotropies to better than 5-10\% in temperature fluctuations on {\it all} scales....
The Nature versus Nurture of Anisotropies (1994)
With the rapidly growing number of cosmic microwave background measurements on various scales, there is real hope that the number of acceptable models for structure formation will be limited to a...
Thermal History Constraints on the Isocurvature Baryon Model (1994)
We present a thorough and detailed investigation of baryon isocurvature models including realistic thermal histories, \ie, late or partial reionization of the universe and compact object formation...
Power Spectrum Constraints from Spectral Distortions in the Cosmic Microwave Background (1994)
Hu, Wayne, Scott, Douglas, Silk, Joseph
%The content of this replacement paper is identical to the original. %We have attempted to fix the postscript so that it will print out on %a larger number of printers. Using recent experimental...
Power Spectrum Independent Constraints on Cosmological Models (1993)
Tegmark, Max, Bunn, Emory, Hu, Wayne
A formalism is presented that allows cosmological experiments to be tested for consistency, and allows a simple frequentist interpretation of the resulting significance levels. As an example of an...
The Small Scale Integrated Sachs-Wolfe Effect (1993)
The integrated Sachs-Wolfe effect (ISW) can be an important factor in the generation of Cosmic Microwave Background anisotropies on all scales, especially in a reionized curvature or lambda dominated...
Hu, Wayne, Scott, Douglas, Silk, Joseph
The ionization history of the universe provides a major source of ambiguity in constraining cosmological models using small angular scale microwave background anisotropies. To clarify these issues,...
The Curious Quantum Mechanics of Pre- and Post-Selected Ensembles (1989)
Despite claims to the contrary, the curious statistical properties of pre- and post-selected ensembles are neither #npossible nor surprising. The properties of weak measurements on such ensembles are...
The Colloquial Landscape (1000)
Wayne Hu, Christopher Gordon, Matt Hedman, Gil Holder, Manoj Kaplinghat, Kendrick Smith, ...
gravitational waves