Statistical methods in cosmology (2009)
The advent of large data-set in cosmology has meant that in the past 10 or 20 years our knowledge and understanding of the Universe has changed not only quantitatively but also, and most importantly,...
Robust Neutrino Constraints by Combining Low Redshift Observations with the CMB (2009)
Reid, Beth A., Verde, Licia, Jimenez, Raul, Mena, Olga
We illustrate how recently improved low-redshift cosmological measurements can tighten constraints on neutrino properties. In particular we examine the impact of the assumed cosmological model on the...
Detectability of the effect of Inflationary non-Gaussianity on halo bias (2009)
Verde, Licia, Matarrese, Sabino
We consider the description of the clustering of halos for physically-motivated types of non-Gaussian initial conditions. In particular we include non-Gaussianity of the type arising from single...
The recent weak lensing measurement of the dark matter mass of the high-redshift galaxy cluster XMMUJ2235.3-2557 of (8.5 +- 1.7) x 10^{14} Msun at z=1.4, indicates that, if the cluster is assumed to...
Shang, Cien, Haiman, Zoltan, Verde, Licia
Scaling relations among galaxy cluster observables, which will become available in large future samples of galaxy clusters, could be used to constrain not only cluster structure, but also cosmology....
Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements (2009)
Stern, Daniel, Jimenez, Raul, Verde, Licia, Kamionkowski, Marc, Stanford, S. Adam
We present new determinations of the cosmic expansion history from red-envelope galaxies. We have obtained for this purpose high-quality spectra with the Keck-LRIS spectrograph of red-envelope...
Stern, Daniel, Jimenez, Raul, Verde, Licia, Stanford, S. Adam, Kamionkowski, Marc
We present a spectroscopic catalog of (mostly) red galaxies in 24 galaxy clusters in the redshift range 0.17 < z < 0.92 obtained with the LRIS instrument on the Keck I telescope. Here we describe the...
Reid, Beth A., Percival, Will J., Eisenstein, Daniel J., Verde, Licia, Spergel, David N., Skibba, Ramin A., ...
We present the power spectrum of the reconstructed halo density field derived from a sample of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey Seventh Data Release (DR7). The halo...
We revisit the predictions for the expected Cosmic Microwave Background bispectrum signal from the primordial-lensing-Rees-Sciama correlation; we point out that it can be a significant contaminant to...
Jimenez, Raul, Slosar, Anze, Verde, Licia, Bamford, Steven, Lintott, Chris, Schawinski, Kevin, ...
We report on the finding of a correlation between galaxies' past star formation activity and the degree to which neighbouring galaxies rotation axes are aligned. This is obtained by cross-correlating...
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...
The Case for Deep, Wide-Field Cosmology (2009)
Scranton, Ryan, Albrecht, Andreas, Caldwell, Robert, Cooray, Asantha, Dore, Olivier, Habib, Salman, ...
Much of the science case for the next generation of deep, wide-field optical/infrared surveys has been driven by the further study of dark energy. This is a laudable goal (and the subject of a...
Exploring Dark Energy with Next-Generation Photometric Redshift Surveys (2009)
Zhan, Hu, Albrecht, Andreas, Cooray, Asantha, Habib, Salman, Heavens, Alan, Heitmann, Katrin, ...
The coming decade will be an exciting period for dark energy research, during which astronomers will address the question of what drives the accelerated cosmic expansion as first revealed by type Ia...
Consistency among distance measurements: transparency, BAO scale and accelerated expansion (2009)
Avgoustidis, A., Verde, Licia, Jimenez, Raul
We explore consistency among different distance measures, including Supernovae Type Ia data, measurements of the Hubble parameter, and determination of the Baryon acoustic oscillation scale. We...
The void abundance with non-gaussian primordial perturbations (2009)
Kamionkowski, Marc, Verde, Licia, Jimenez, Raul
We use a Press-Schechter-like calculation to study how the abundance of voids changes in models with non-Gaussian initial conditions. While a positive skewness increases the cluster abundance, a...
The void abundance with non-gaussian primordial perturbations (2009)
Kamionkowski, Marc, Verde, Licia, Jiménez, Raúl
9 pages, 3 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0809.0506
Niemack, Michael D., Jiménez, Raúl, Verde, Licia, Menanteau, Felipe, Panter, Ben, Spergel, David
13 pages, 8 figures.-- Online version published on Dec 1, 2008.-- ArXiv pre-print available at: http://arxiv.org/abs/0803.3221
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
Photo-z optimization for measurements of the BAO radial direction (2008)
Roig, Daniel, Verde, Licia, Miralda-Escude, Jordi, Jimenez, Raul, Pena-Garay, Carlos
Baryon Acoustic Oscillations (BAO) in the radial direction offer a method to directly measure the Universe expansion history, and to set limits to space curvature when combined to the angular BAO...
Delayed Recombination and Standard Rulers (2008)
De Bernardis, Francesco, Bean, Rachel, Galli, Silvia, Melchiorri, Alessandro, Silk, Joseph, Verde, Licia
Measurements of Baryonic Acoustic Oscillations in galaxy surveys have been recognized as a powerful tool for constraining dark energy. However, this method relies on the knowledge of the size of the...
Southern Cosmology Survey III: QSO's from Combined GALEX and Optical Photometry (2008)
Jimenez, Raul, Spergel, David N., Niemack, Michael D., Menanteau, Felipe, Hughes, John P., Verde, Licia, ...
We present catalogs of QSO candidates selected using photometry from GALEX combined with SDSS in the Stripe 82 region and Blanco Cosmology Survey (BCS) near declination -55 degrees. The SDSS region...
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization (2008)
Baumann, Daniel, Jackson, Mark G, Adshead, Peter, Amblard, Alexandre, Ashoorioon, Amjad, Bartolo, Nicola, ...
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measurements to...
CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background (2008)
Zaldarriaga, Matias, Colombo, Loris, Komatsu, Eiichiro, Lidz, Adam, Mortonson, Michael, Oh, S. Peng, ...
We summarize existing constraints on the epoch of reionization and discuss the observational probes that are sensitive to the process. We focus on the role large scale polarization can play....
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization (2008)
Baumann, Daniel, Jackson, Mark G., Adshead, Peter, Amblard, Alexandre, Ashoorioon, Amjad, Bartolo, Nicola, ...
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measurements to...
The Void Abundance with Non-Gaussian Primordial Perturbations (2008)
Kamionkowski, Marc, Verde, Licia, Jimenez, Raul
We use a Press-Schechter-like calculation to study how the abundance of voids changes in models with non-Gaussian initial conditions. While a positive skewness increases the cluster abundance, a...
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
We present first results from the Southern Cosmology Survey, a new multiwavelength survey of the southern sky coordinated with the Atacama Cosmology Telescope (ACT), a recently commissioned...
The improvement on cosmological parameters with H(z) measurements (2008)
García Figueroa, Daniel, Verde, Licia, Jiménez, Raúl
9 pages, 6 figures.
Improved Cosmological Parameter Constraints from CMB and H(z) Data (2008)
Figueroa, Daniel G., Verde, Licia, Jimenez, Raul
We discuss the cosmological degeneracy between the Hubble parameter H(z), the age of the universe and cosmological parameters describing simple variations from the minimal LCDM model. We show that...
Prospects in Constraining the Dark Energy Potential (2008)
Fernandez-Martinez, Enrique, Verde, Licia
We generalize to non-flat geometries the formalism of Simon et al. (2005) to reconstruct the dark energy potential. This formalism makes use of quantities similar to the Horizon-flow parameters in...
Non-Gaussian halo bias and future galaxy surveys (2008)
Carbone, Carmelita, Verde, Licia, Matarrese, Sabino
We forecast constraints on primordial non-Gaussianity achievable from forthcoming surveys by exploiting the scale-dependent halo bias introduced on large scales by non-Gaussian initial conditions. We...
Niemack, Michael D., Jimenez, Raul, Verde, Licia, Menanteau, Felipe, Panter, Ben, Spergel, David
Four large-area Sunyaev-Zeldovich (SZ) experiments -- APEX-SZ, SPT, ACT, and Planck -- promise to detect clusters of galaxies through the distortion of Cosmic Microwave Background photons by hot (>...
Verde, Licia, Peiris, Hiranya V.
The latest cosmological data seem to indicate a significant deviation from scale invariance of the primordial power spectrum when parameterized either by a power law or by a spectral index with...
The effect of primordial non-Gaussianity on halo bias (2008)
Matarrese, Sabino, Verde, Licia
It has long been known how to analytically relate the clustering properties of the collapsed structures (halos) to those of the underlying dark matter distribution for Gaussian initial conditions....
Prospects in Constraining the Dark Energy Potential (2008)
Fernandez-Martinez, Enrique, Verde, Licia
We generalize to non-flat geometries the formalism of Simon et al. (2005) to reconstruct the dark energy potential. This formalism makes use of quantities similar to the Horizon-flow parameters in...
A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology (2007)
This is the summary of 4 Lectures given at the XIX Canary islands winter school of Astrophysics ''The Cosmic Microwave Background, from Quantum Fluctuations to the present Universe''. Lectures were...
Topology from Cosmology (2007)
Balasubramanian, Vijay, Berglund, Per, Jimenez, Raul, Simon, Joan, Verde, Licia
We show that cosmological observables can constrain the topology of the compact additional dimensions predicted by string theory. To do this, we develop a general strategy for relating cosmological...
Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures (2007)
LoVerde, Marilena, Miller, Amber, Shandera, Sarah, Verde, Licia
The detection of primordial non-Gaussianity could provide a powerful means to test various inflationary scenarios. Although scale-invariant non-Gaussianity (often described by the $f_{NL}$ formalism)...
Hernandez-Monteagudo, Carlos, Haiman, Zoltan, Verde, Licia, Jimenez, Raul
At the epoch of reionization, when the high-redshift inter-galactic medium (IGM) is being enriched with metals, the 63.2 micron fine structure line of OI is pumped by the ~ 1300 AA soft UV background...
Observational signatures of Jordan-Brans-Dicke theories of gravity (2007)
Acquaviva, Viviana, Verde, Licia
We analyze the Jordan-Brans-Dicke model (JBD) of gravity, where deviations from General Relativity (GR) are described by a scalar field non-minimally coupled to gravity. The theory is characterized...
The Cosmic Neutrino Background and the Age of the Universe (2007)
De Bernardis, Francesco, Melchiorri, Alessandro, Verde, Licia, Jimenez, Raul
We discuss the cosmological degeneracy between the age of the Universe, the Hubble parameter and the effective number of relativistic particles N_eff. We show that independent determinations of the...
The Kinetic Sunyaev-Zel'dovich Effect Due to the Electrons of Our Galaxy (2007)
Hajian, Amir, Hernandez-Monteagudo, Carlos, Jimenez, Raul, Spergel, David, Verde, Licia
We compute the effect of local electrons on the CMB temperature anisotropies. The number density and distribution of free electrons in our Galaxy has been accurately measured from pulsar dispersion...
Oxygen Pumping: Mapping the Reionization Epoch with the CMB (2006)
Hernandez-Monteagudo, Carlos, Haiman, Zoltan, Jimenez, Raul, Verde, Licia
We consider the pumping of the $63.2 \mu$m fine structure line of neutral OI in the high--redshift intergalactic medium (IGM), in analogy with the Wouthuysen--Field effect for the 21cm line of cosmic...
The thermal Sunyaev-Zel'dovich Signature of Baryons in the Local Universe (2006)
Hernandez-Monteagudo, Carlos, Trac, Hy, Jimenez, Raul, Verde, Licia
Using cosmological hydrodynamical simulations, we investigate the prospects of the thermal Sunyaev-Zel'dovich (tSZ) effect to detect the missing baryons in the local universe. We find that at least...
Using cosmology to constrain the topology of hidden dimensions (2006)
Simon, Joan, Jimenez, Raul, Verde, Licia, Berglund, Per, Balasubramanian, Vijay
A four-dimensional universe, arising from a flux compactification of Type IIB string theory, contains scalar fields with a potential determined by topological and geometric parameters of the internal...
Tomography of the Reionization Epoch with Multifrequency CMB Observations (2006)
Hernandez-Monteagudo, Carlos, Verde, Licia, Jimenez, Raul
We study the constraints that future multifrequency Cosmic Microwave Background (CMB) experiments will be able to set on the metal enrichment history of the Inter Galactic Medium at the epoch of...
Stacking weak lensing signals of SZ clusters to constrain cluster physics (2006)
Sealfon, Carolyn, Verde, Licia, Jimenez, Raul
We show how to place constraints on cluster physics by stacking the weak lensing signals from multiple clusters found through the Sunyaev-Zeldovich (SZ) effect. For a survey that covers about 200 sq....
Smoothing spline primordial power spectrum reconstruction (2005)
Sealfon, Carolyn, Verde, Licia, Jimenez, Raul
We reconstruct the shape of the primordial power spectrum (PPS) using a smoothing spline. Our adapted smoothing spline technique provides a complementary method to existing efforts to search for...
Considerations in optimizing CMB polarization experiments to constrain inflationary physics (2005)
Verde, Licia, Peiris, Hiranya, Jimenez, Raul
We quantify the limiting factors in optimizing current-technology cosmic microwave background (CMB) polarization experiments in order to learn about inflationary physics. We consider space-based,...
Evolution of the density profiles of dark matter haloes (2005)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
Also archived in: arXiv: astro-ph/0312544 v3 1 Apr 2005
Constraints on the redshift dependence of the dark energy potential (2004)
Simon, Joan, Verde, Licia, Jimenez, Raul
We develop a formalism to characterize the redshift evolution of the dark energy potential. Our formalism makes use of quantities similar to the Horizon-flow parameters in inflation and is general...
Jimenez, Raul, Verde, Licia, Peiris, Hiranya, Kosowsky, Arthur
We improve the algorithm of Kosowsky, Milosavljevic, and Jimenez (2002) for computing power spectra of the cosmic microwave background. The present algorithm computes not only the temperature power...
Limits on deviations from the inverse-square law on megaparsec scales (2004)
Sealfon, Carolyn, Verde, Licia, Jimenez, Raul
We present an attempt to constrain deviations from the gravitational inverse-square law on large-scale structure scales. A perturbed law modifies the Poisson equation, which implies a scale-dependent...
Jimenez, Raul, Panter, Benjamin, Heavens, Alan, Verde, Licia
Using the spectroscopic sample of the SDSS DR1 we measure how gas was transformed into stars as a function of time and stellar mass: the baryonic conversion tree (BCT). There is a clear correlation...
Evolution of the Density Profiles of Dark Matter Haloes (2003)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
We use numerical simulations in a Lambda CDM cosmology to model density profiles in a set of 16 dark matter haloes with resolutions of up to 7 million particles within the virial radius. These...
Fourier analysis of luminosity-dependent galaxy clustering (2003)
Percival, Will J., Verde, Licia, Peacock, John A.
We extend the Fourier transform based method for the analysis of galaxy redshift surveys of Feldman, Kaiser & Peacock (1994: FKP) to model luminosity-dependent clustering. In a magnitude limited...
Since this is a meeting on inflation the title of this talk should probably have been ``The cosmos as a lab for inflation''. I will illustrate how, by combining WMAP observations of the cosmic...
Jimenez, Raul, Verde, Licia, Treu, Tommaso, Stern, Daniel
We place tight constraints on the redshift-averaged, effective value of the equation of state of dark energy, w, using only the absolute ages of Galactic stars and the observed position of the first...
Dark matter spikes and annihilation radiation from the galactic center (2002)
Merritt, David, Milosavljevic, Milos, Verde, Licia, Jimenez, Raul
Also archived in: arXiv: astro-ph/0201376 v3 9 May 2002
Dark matter spikes and annihilation radiation from the galactic center (2002)
Merritt, David, Milosavljevic, Milos, Verde, Licia, Jimenez, Raul
Also archived in: arXiv: astro-ph/0201376 v3 9 May 2002
The abundance of dark galaxies (2002)
Verde, Licia, Oh, S. Peng, Jimenez, Raul
We show that gas in a large fraction of low mass dark matter halos may form Toomre stable disks, if angular momentum is conserved when the gas contracts. Such halos would be stable to star formation...
Dark Matter Spikes and Annihilation Radiation from the Galactic Center (2002)
Merritt, David, Milosavljevic, Milos, Verde, Licia, Jimenez, Raul
The annihilation rate of weakly interacting cold dark matter particles at the galactic center could be greatly enhanced by the growth of a density spike around the central supermassive black hole...
Dark halo properties from rotation curves (2002)
Jimenez, Raul, Verde, Licia, Oh, S. Peng
We study a large set of high spatial resolution optical rotation curves of galaxies with the goal of determining the model parameters for a disk embedded within a CDM halo that we model either with a...
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Percival, Will J., Matarrese, Sabino, Baugh, Carlton, Bland-Hawthorn, Joss, ...
We compute the bispectrum of the 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure the bias parameter of the galaxies. This parameter quantifies the strength of clustering of the galaxies...
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Percival, Will J., Matarrese, Sabino, Baugh, Carlton, Bland-Hawthorn, Joss, ...
We compute the bispectrum of the 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure the bias parameter of the galaxies. This parameter quantifies the strength of clustering of the galaxies...
The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe (2002)
Verde, Licia, Heavens, Alan F., Colless, Matthew, Jackson, Carole, Peterson, Bruce A. (et Al.)
not available
The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe (2001)
Verde, Licia, Heavens, Alan F., Percival, Will J., Matarrese, Sabino, Baugh, C. M., Bland-Hawthorn, J., ...
We compute the bispectrum of the 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure the bias parameter of the galaxies. This parameter quantifies the strength of clustering of the galaxies...
Dark energy and cosmic microwave background bispectrum (2001)
Verde, Licia, Spergel, David N.
We compute the cosmic microwave background bispectrum arising from the cross-correlation of primordial, lensing and Rees-Sciama signals. The amplitude of the bispectrum signal is sensitive to the...
Verde, Licia, Haiman, Zoltan, Spergel, David N.
An extensive sample of galaxy clusters will be available in the coming years, detected through their Sunyaev-Zeldovich effect (SZE). We use a semi-analytic model to study the scientific yield of...
On the trispectrum as a gaussian test for cosmology (2001)
Verde, Licia, Heavens, Alan F.
In the standard model for structure formation, bound objects originate from the gravitational collapse of small perturbations arising from quantum fluctuations with random phases. In other scenarios,...
Tests for primordial non-Gaussianity (2000)
Verde, Licia, Jimenez, Raul, Kamionkowski, Marc, Matarrese, Sabino
We investigate the relative sensitivities of several tests for deviations from Gaussianity in the primordial distribution of density perturbations. We consider models for non-Gaussianity that mimic...
On Galaxy-Cluster Sizes and Temperatures (2000)
Verde, Licia, Kamionkowski, Marc, Mohr, Joseph J., Benson, Andrew J.
We show that the distribution of the sizes and temperatures of clusters can be used to constrain cosmological models. The size-temperature (ST) distribution predicted in a flat Gaussian...
Non-Gaussianity vs. non-linearity of cosmological perturbations (2000)
Following the discovery of the CMB, the hot big-bang model has become the standard cosmological model. In this theory, small primordial fluctuations are subsequently amplified by gravity to form the...
Projected bispectrum in spherical harmonics and its application to angular galaxy catalogues (2000)
Verde, Licia, Heavens, Alan F., Matarrese, Sabino
We present a theoretical and exact analysis of the bispectrum of projected galaxy catalogues. The result can be generalized to evaluate the projection in spherical harmonics of any 3D bispectrum and...
The abundance of high-redshift objects as a probe of non-Gaussian initial conditions (2000)
Matarrese, Sabino, Verde, Licia, Jimenez, Raul
The observed abundance of high-redshift galaxies and clusters contains precious information about the properties of the initial perturbations. We present a method to compute analytically the number...
Large-scale structure, the cosmic microwave background, and primordial non-gaussianity (1999)
Verde, Licia, Wang, Limin, Heavens, Alan, Kamionkowski, Marc
Since cosmic-microwave-background (CMB) and large-scale-structure (LSS) data will shortly improve dramatically with the Microwave Anisotropy Probe (MAP) and Planck Surveyor, and the Anglo-Australian...
Large-scale bias in the Universe II: redshift space bispectrum (1998)
Verde, Licia, Heavens, Alan F., Matarrese, Sabino, Moscardini, Lauro
The determination of the density parameter $\Omega_0$ from the large-scale distribution of galaxies is one of the major goals of modern cosmology. However, if galaxies are biased tracers of the...
Bias and primordial non-gaussianity : cosmology with future data sets /
Thesis (Ph. D.)--University of Edinburgh, 2001.