Uros Seljak

Constraints on local primordial non-Gaussianity from large scale structure (2008)

Non-gaussianity in the initial conditions of the universe is one of the most powerful mechanisms to discriminate among the competing theories of the early universe. Measurements using bispectrum of...

Slosar, Anze, Hirata, Christopher, Seljak, Uros, Ho, Shirley, Padmanabhan, Nikhil

Recent work has shown that the local non-Gaussianity parameter f_NL induces a scale-dependent bias, whose amplitude is growing with scale. Here we first rederive this result within the context of...

Halo mass - concentration relation from weak lensing (2008)

Mandelbaum, Rachel, Seljak, Uros, Hirata, Christopher M.

We perform a statistical weak lensing analysis of dark matter profiles around tracers of halo mass from galactic- to cluster-size halos. In this analysis we use 170,640 isolated ~L* galaxies split...

Improved optical mass tracer for galaxy clusters calibrated using weak lensing measurements (2008)

Reyes, Reinabelle, Mandelbaum, Rachel, Hirata, Christopher M., Bahcall, Neta, Seljak, Uros

We develop an improved mass tracer for clusters of galaxies from optically observed parameters, and calibrate the mass relation using weak gravitational lensing measurements. We employ a sample of ~...

Correlation of CMB with large-scale structure: I. ISW Tomography and Cosmological Implications (2008)

Ho, Shirley, Hirata, Christopher M., Padmanabhan, Nikhil, Seljak, Uros, Bahcall, Neta

We cross-correlate large scale structure (LSS) observations from a number of surveys with CMB anisotropies from WMAP to investigate the Integrated Sachs-Wolfe (ISW) effect as a function of redshift,...

Correlation of CMB with large-scale structure: II. Weak lensing (2008)

Hirata, Christopher M., Ho, Shirley, Padmanabhan, Nikhil, Seljak, Uros, Bahcall, Neta

We investigate the correlation of gravitational lensing of the cosmic microwave background (CMB) with several tracers of large-scale structure, including luminous red galaxies (LRGs), quasars, and...

The sixth data release of the Sloan Digital Sky Survey (2008)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...

This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...

The sixth data release of the Sloan Digital Sky Survey (2008)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...

This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...

The sixth data release of the sloan digital sky survey (2008)

Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...

The sixth data release of the Sloan Digital Sky Survey (2008)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...

This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...

The sixth data release of the Sloan Digital Sky Survey (2008)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...

This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...

Simulating Weak Lensing By Large-Scale Structure (2007)

Bhuvnesh Jain, Uros Seljak, Simon White

. We use numerical simulations of ray tracing through N-body simulations to investigate weak lensing by large-scale structure. Here we focus on the reconstruction of statistics of the convergence...

A robust lower limit on the amplitude of matter fluctuations in the universe from cluster abundance and weak lensing (2007)

Mandelbaum, Rachel, Seljak, Uros

Cluster abundance measurements are among the most sensitive probes of the amplitude of matter fluctuations in the universe, which in turn can help constrain other cosmological parameters, like the...

Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys (2007)

Hirata, Christopher M., Mandelbaum, Rachel, Ishak, Mustapha, Seljak, Uros, Nichol, Robert, Pimbblet, Kevin A., ...

Correlations between intrinsic shear and the density field on large scales, a potentially important contaminant for cosmic shear surveys, have been robustly detected at low redshifts with bright...

The fifth data release of the sloan digital sky survey (2007)

Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

The fifth data release of the Sloan Digital Sky Survey (2007)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...

The Fifth Data Release of the Sloan Digital Sky Survey (2007)

Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...

The Fifth Data Release of the Sloan Digital Sky Survey (2007)

Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...

The fifth data release of the Sloan Digital Sky Survey (2007)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...

Cosmological constraints from the SDSS Luminous Red Galaxies (2006)

Tegmark, Max, Eisenstein, Daniel, Strauss, Michael, Weinberg, David, Blanton, Michael, Frieman, Joshua, ...

Also archived in: arXiv:astro-ph/0608632 v2 Oct 30 2006

The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses (2006)

Massey, Richard, Heymans, Catherine, Berge, Joel, Bernstein, Gary, Bridle, Sarah, Clowe, Douglas, ...

The Shear TEsting Programme (STEP) is a collaborative project to improve the accuracy and reliability of weak lensing measurement, in preparation for the next generation of wide-field surveys. We...

Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing (2006)

Mandelbaum, Rachel, Seljak, Uros, Cool, Richard J., Blanton, Michael, Hirata, Christopher M., Brinkmann, Jonathan

We present results of a measurement of the shape of the density profile of galaxy groups and clusters traced by 43 335 Luminous Red Galaxies (LRGs) with spectroscopic redshifts from the Sloan Digital...

Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints (2006)

Seljak, Uros, Slosar, Anze, McDonald, Patrick

We combine the Ly-alpha forest power spectrum (LYA) from the Sloan Digital Sky Survey (SDSS) and high resolution spectra with cosmic microwave background (CMB) including 3-year WMAP, and supernovae...

B polarization of cosmic microwave background as a tracer of strings (2006)

Seljak, Uros, Slosar, Anze

String models can produce successful inflationary scenarios in the context of brane collisions and in many of these models cosmic strings may also be produced. In scenarios such as KKLMMT the string...

Can sterile neutrinos be the dark matter? (2006)

Seljak, Uros, Makarov, Alexey, McDonald, Patrick, Trac, Hy

We use the Ly-alpha forest power spectrum measured by the SDSS and high-resolution spectroscopy observations in combination with cosmic microwave background and galaxy clustering constraints to place...

The fourth data release of the sloan digital sky survey (2006)

Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

The fourth data release of the sloan digital sky survey (2006)

Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

The fourth data release of the sloan digital sky survey (2006)

Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

The fourth data release of the Sloan Digital Sky Survey (2006)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...

The fourth data release of the Sloan Digital Sky Survey (2006)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

The fourth data release of the Sloan Digital Sky Survey (2006)

Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...

This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

Galaxy halo masses and satellite fractions from galaxy-galaxy lensing in the SDSS: stellar mass, luminosity, morphology, and environment dependencies (2005)

Mandelbaum, Rachel, Seljak, Uros, Kauffmann, Guinevere, Hirata, Christopher M., Brinkmann, Jonathan

The relationship between galaxies and dark matter can be characterized by the halo mass of the central galaxy and the fraction of galaxies that are satellites. Here we present observational...

Detection of large scale intrinsic ellipticity-density correlation from the Sloan Digital Sky Survey and implications for weak lensing surveys (2005)

Mandelbaum, Rachel, Hirata, Christopher M., Ishak, Mustapha, Seljak, Uros, Brinkmann, Jonathan

The power spectrum of weak lensing shear caused by large-scale structure is an emerging tool for precision cosmology, in particular for measuring the effects of dark energy on the growth of structure...

Detectability of tensor modes in the presence of foregrounds (2005)

Amarie, Mihail, Hirata, Christopher, Seljak, Uros

In inflationary models, gravitational waves are produced and generate B-type polarization in the CMB. Since B polarization is only generated by gravity waves it does not suffer from the cosmic...

Pairwise velocities in the Halo Model: Luminosity and Scale Dependence (2005)

Slosar, Anze, Seljak, Uros, Tasitsiomi, Argyro

We investigate the properties of the pairwise velocity dispersion as a function of galaxy luminosity in the context of a halo model. We derive the distribution of velocities of pairs at a given...

Ellipticity of dark matter halos with galaxy-galaxy weak lensing (2005)

Mandelbaum, Rachel, Hirata, Christopher M., Broderick, Tamara, Seljak, Uros, Brinkmann, Jonathan

We present the results of attempts to detect the ellipticity of dark matter halos using galaxy-galaxy weak lensing with SDSS data. We use 2,020,256 galaxies brighter than r=19 with photometric...

Can superhorizon cosmological perturbations explain the acceleration of the universe? (2005)

Systematic errors in weak lensing: application to SDSS galaxy-galaxy weak lensing (2005)

We investigate the recent suggestions by Barausse et al. (astro-ph/0501152) and Kolb et al. (hep-th/0503117) that the acceleration of the universe could be explained by large superhorizon...

Mandelbaum, Rachel, Hirata, Christopher M., Seljak, Uros, Guzik, Jacek, Padmanabhan, Nikhil, Blake, Cullen, ...

Weak lensing is emerging as a powerful observational tool to constrain cosmological models, but is at present limited by an incomplete understanding of many sources of systematic error. Many of these...

Galaxy-galaxy Lensing: Dissipationless Simulations Versus the Halo Model (2004)

Mandelbaum, Rachel, Tasitsiomi, Argyro, Seljak, Uros, Kravtsov, Andrey V., Wechsler, Risa H.

Galaxy-galaxy lensing is a powerful probe of the relation between galaxies and dark matter halos, but its theoretical interpretation requires a careful modeling of various contributions, such as the...

Correlating the CMB with Luminous Red Galaxies : The Integrated Sachs-Wolfe Effect (2004)

Padmanabhan, Nikhil, Hirata, Christopher M., Seljak, Uros, Schlegel, David, Brinkmann, Jonathan, Schneider, Donald P.

We present a 2.5 sigma detection of the Integrated Sachs-Wolfe (ISW) effect and discuss the constraints it places on cosmological parameters. We cross-correlate microwave temperature maps from the...

Prospects for ACT: simulations, power spectrum, and non-Gaussian analysis (2004)

Huffenberger, Kevin M., Seljak, Uros

A new generation of instruments will reveal the microwave sky at high resolution. We focus on one of these, the Atacama Cosmology Telescope, which probes scales 1000

Calibrating Photometric Redshifts of Luminous Red Galaxies (2004)

Padmanabhan, Nikhil, Budavari, Tamas, Schlegel, David J., Bridges, Terry, Brinkmann, Jonathan, Cannon, Russell, ...

We discuss the construction of a photometric redshift catalogue of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS), emphasizing the principal steps necessary for constructing...

Intrinsic alignment-lensing interference as a contaminant of cosmic shear (2004)

Cross-correlation of CMB with large-scale structure: weak gravitational lensing (2004)

Cosmic shear surveys have great promise as tools for precision cosmology, but can be subject to systematic errors including intrinsic ellipticity correlations of the source galaxies. The intrinsic...

Hirata, Christopher M., Padmanabhan, Nikhil, Seljak, Uros, Schlegel, David, Brinkmann, Jonathan

We present the results of a search for gravitational lensing of the cosmic microwave background (CMB) in cross-correlation with the projected density of luminous red galaxies (LRGs). The CMB lensing...

The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey (2004)

McDonald, Patrick, Seljak, Uros, Burles, Scott, Schlegel, David J., Weinberg, David H., Shih, David, ...

We measure the power spectrum, P_F(k,z), of the transmitted flux in the Ly-alpha forest using 3035 high redshift quasar spectra from the Sloan Digital Sky Survey. This sample is almost two orders of...

Sunyaev-Zeldovich effect in WMAP and its effect on cosmological parameters (2004)

Huffenberger, Kevin M., Seljak, Uros, Makarov, Alexey

We use multi-frequency information in first year WMAP data to search for the Sunyaev-Zeldovich (SZ) effect. WMAP has sufficiently broad frequency coverage to constrain SZ without the addition of...

Assessing the effects of foregrounds and sky removal in WMAP (2004)

Slosar, Anze, Seljak, Uros

Many recent analyses have indicated that large scale WMAP data display anomalies that appear inconsistent with the standard cosmological paradigm. However, the effects of foreground contamination,...

Large scale bias and stochasticity of halos and dark matter (2004)

Seljak, Uros, Warren, Michael S.

On large scales galaxies and their halos are usually assumed to trace the dark matter with a constant bias and dark matter is assumed to trace the linear density field. We test these assumption using...

Galaxy-galaxy weak lensing in SDSS: intrinsic alignments and shear calibration errors (2004)

Hirata, Christopher M., Mandelbaum, Rachel, Seljak, Uros, Guzik, Jacek, Padmanabhan, Nikhil, Blake, Cullen, ...

Galaxy-galaxy lensing has emerged as a powerful probe of the dark matter halos of galaxies, but is subject to contamination if intrinsically aligned satellites of the lens galaxy are used as part of...

The Second Data Release of the Sloan Digital sky survey (2004)

Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...

Sloan digital sky survey imaging of low galactic latitude fields: technical summary and data release (2004)

Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...

The Second Data Release of the Sloan Digital sky survey (2004)

Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...

Sloan Digital Sky Survey Imaging of Low Galactic Latitude Fields: Technical Summary and Data Release (2004)

Finkbeiner, Douglas P., Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...

The Sloan Digital Sky Survey (SDSS) mosaic camera and telescope have obtained five-band optical-wavelength imaging near the Galactic plane outside of the nominal survey boundaries. These additional...

The second data release of the Sloan Digital Sky Survey (2004)

Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...

The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...

The second data release of the Sloan Digital Sky Survey (2004)

Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...

The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...

Signatures of Relativistic Neutrinos in CMB Anisotropy and Matter Clustering (2003)

Bashinsky, Sergei, Seljak, Uros

We present a detailed analytical study of ultra-relativistic neutrinos in cosmological perturbation theory and of the observable signatures of inhomogeneities in the cosmic neutrino background. We...

Gravitational lensing as a contaminant of the gravity wave signal in CMB (2003)

Seljak, Uros, Hirata, Christopher M.

Gravity waves (GW) in the early universe generate B-type polarization in the cosmic microwave background (CMB), which can be used as a direct way to measure the energy scale of inflation....

Weak Lensing and CMB: Parameter forecasts including a running spectral index (2003)

Ishak, Mustapha, Hirata, Christopher M., McDonald, Patrick, Seljak, Uros

We use statistical inference theory to explore the constraints from future galaxy weak lensing (cosmic shear) surveys combined with the current CMB constraints on cosmological parameters, focusing...

Reconstruction of lensing from the cosmic microwave background polarization (2003)

Cosmological constraints from the CMB and Ly-alpha forest revisited (2003)

Gravitational lensing of the cosmic microwave background (CMB) polarization field has been recognized as a potentially valuable probe of the cosmological density field. We apply likelihood-based...

Seljak, Uros, McDonald, Patrick, Makarov, Alexey

The WMAP team has recently highlighted the usefulness of combining the Ly-alpha forest constraints with those from the cosmic microwave background (CMB). This combination is particularly powerful as...

Halo Concentration and the Dark Matter Power Spectrum (2003)

Huffenberger, Kevin M., Seljak, Uros

We explore the connection between halo concentration and the dark matter power spectrum using the halo model. We fit halo model parameters to non-linear power spectra over a large range of...

Shear calibration biases in weak lensing surveys (2003)

The first data release of the sloan digital sky survey (2003)

We investigate biases induced by the conversion between the observed image shape to shear distortion in current weak lensing analysis methods. Such overall calibration biases cannot be detected by...

Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...

The first data release of the sloan digital sky survey (2003)

Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...

The first data release of the Sloan Digital Sky Survey (2003)

Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...

The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...

The first data release of the Sloan Digital Sky Survey (2003)

Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...

The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...

Constraining the dark energy with Ly-alpha forest (2002)

Seljak, Uros, Mandelbaum, Rachel, McDonald, Patrick

Statistical properties of gas absorption in high redshift quasars such as power spectrum and bispectrum allow one to determine the evolution of structure over the redshift range 22. In combination...

Analyzing weak lensing of the cosmic microwave background using the likelihood function (2002)

The Sunyaev-Zel'dovich angular power spectrum as a probe of cosmological parameters (2002)

Future experiments will produce high-resolution temperature maps of the cosmic microwave background (CMB) and are expected to reveal the signature of gravitational lensing by intervening large-scale...

Komatsu, Eiichiro, Seljak, Uros

The angular power spectrum of the SZ effect, C_l, is a powerful probe of cosmology. It is easier to detect than individual clusters in the field, is insensitive to observational selection effects and...

Cosmological constraints from the masses and abundances of L* galaxies (2002)

Cluster abundance normalization from observed mass-temperature relation (2001)

We place limits on the mean density of the universe and the slope of the linear power spectrum around a megaparsec scale by comparing the universal mass function to the observed luminosity function....

Galaxy Mass and Luminosity Scaling Laws Determined by Weak Gravitational Lensing (2001)

Abundance of rich clusters in local universe is currently believed to provide the most robust normalization of power spectrum at a scale of 10 Mpc. This normalization depends very sensitively on the...

McKay, Timothy A., Sheldon, Erin Scott, Racusin, Judith, Fischer, Philippe, Seljak, Uros, Stebbins, Albert, ...

We present new measurements of scaling laws relating the luminosity of galaxies to the amplitude and shape of their dark matter halos. Early imaging and spectroscopic data from the Sloan Digital Sky...

Universal gas density and temperature profile (2001)

Komatsu, Eiichiro, Seljak, Uros

We present an analytic approach to predict gas density and temperature profiles in dark matter haloes. We assume that the gas density profile traces the dark matter density profile in outer parts of...

Redshift space bias and beta from the halo model (2000)

Correlations in the Lyman alpha forest: testing the gravitational instability paradigm (2000)

We analyze scale dependence of redshift space bias $b$ and $\beta \equiv \Omega_m^{0.6}/b$ in the context of the halo model. We show that linear bias is a good approximation only on large scales, for...

Zaldarriaga, Matias, Seljak, Uros, Hui, Lam

We investigate correlations between the long wavelength fluctuations and the small scale power in the Lyman alpha forest. We show that such correlations can be used to discriminate between...

Galaxy-dark matter correlations applied to galaxy-galaxy lensing: predictions from the semi-analytic galaxy formation models (2000)

Guzik, Jacek, Seljak, Uros

We use semi-analytic models of galaxy formation combined with high resolution N-body simulations to make predictions for galaxy-dark matter correlations and apply them to galaxy-galaxy lensing. We...

Tentative Detection of Galaxy Spin Correlations in the Tully Catalogue (2000)

Pen, Ue-Li, Lee, Jounghun, Seljak, Uros

We report a tentative detection of spin correlations in the Tully catalogue of nearby galaxies. We define a simple but nontrivial spin correlation function, and find an analytic estimate of it in the...

On Estimating the QSO Transmission Power Spectrum (2000)

Hui, Lam, Burles, Scott, Seljak, Uros, Rutledge, Robert E., Magnier, Eugene, Tytler, David

We present new methods to minimize the systematic and random errors for measuring the transmission power spectrum from the Lyman-alpha forest. Sources of systematic errors explored include metal line...

Analytic model for galaxy and dark matter clustering (2000)

Sunyaev-Zeldovich effect from hydrodynamical simulations: maps and low order statistics (2000)

We investigate an analytic model to compute nonlinear power spectrum of dark matter, galaxies and their cross-correlation. The model is based on Press-Schechter halos, which cluster and have...

Seljak, Uros, Burwell, Juan, Pen, Ue-Li

We use moving mesh hydrodynamical simulations to make maps of Sunyaev-Zeldovich effect. We present these maps for several cosmological models and explore their lowest moments. We find that the first...

Lensing effect on polarization in microwave background: extracting convergence power spectrum (1999)

Guzik, Jacek, Seljak, Uros, Zaldarriaga, Matias

Matter inhomogeneities along the line of sight deflect the cosmic microwave background (CMB) photons originating at the last scattering surface at redshift $z \sim 1100$. These distortions modify the...

CMBFAST for spatially closed universes (1999)

Limits on the Density of Compact Objects from High Redshift Supernovae (1999)

We extend the cosmological linear perturbation theory code CMBFAST to closed geometries. This completes the implementation of CMBFAST to all types of geometries and allows the user to perform an...

Seljak, Uros, Holz, Daniel E.

Due to the effects of gravitational lensing, the magnification distribution of high redshift supenovae can be a powerful discriminator between smooth dark matter and dark matter consisting of compact...

Lensing Induced Cluster Signatures in Cosmic Microwave Background (1999)

Simulating Weak Lensing by Clusters and Large-Scale Structure (1999)

We show that clusters of galaxies induce step-like wiggles on top of the cosmic microwave background (CMB). The direction of the wiggle is parallel to the large scale gradient of CMB allowing one to...

Jain, Bhuvnesh, Seljak, Uros, White, Simon

Selected results on estimating cosmological parameters from simulated weak lensing data with noise are presented. Numerical simulations of ray tracing through N-body simulations have been used to...

Ray Tracing Simulations of Weak Lensing by Large-Scale Structure (1999)

Jain, Bhuvnesh, Seljak, Uros, White, Simon

We investigate weak lensing by large-scale structure using ray tracing through N-body simulations. Photon trajectories are followed through high resolution simulations of structure formation to make...

Direct Signature of Evolving Gravitational Potential from Cosmic Microwave Background (1998)

Reconstructing Projected Matter Density from Cosmic Microwave Background (1998)

We show that time dependent gravitational potential can be directly detected from the cosmic microwave background (CMB) anisotropies. The signature can be measured by cross-correlating the CMB with...

Measuring Dark Matter Power Spectrum from Cosmic Microwave Background (1998)

Gravitational lensing distorts the cosmic microwave background (CMB) anisotropies and imprints a characteristic pattern onto it. The distortions depend on the projected matter density between today...

Polarization of Microwave Background: Statistical and Physical Properties (1998)

We propose a method to extract the projected power spectrum of density perturbations from the distortions in the cosmic microwave background (CMB). The distortions are imprinted onto the CMB by the...

Numerical Investigations of Weak Lensing by Large-Scale Structure (1998)

We discuss statistical and physical properties of cosmic microwave background polarization, both in Fourier and in real space. The latter allows for a more intuitive understanding of some of the...

Jain, Bhuvnesh, Seljak, Uros, White, Simon

We use numerical simulations of ray tracing through N-body simulations to investigate weak lensing by large-scale structure. These are needed for testing the analytic predictions of two-point...

Gravitational Lensing Effect on Cosmic Microwave Background Polarization (1998)

Weak Lensing Reconstruction and Power Spectrum Estimation: Minimum Variance Methods (1997)

We investigate the effect of gravitational lensing by matter distribution in the universe on the cosmic microwave background (CMB) polarization power spectra and temperature-polarization...

Cosmography and Power Spectrum Estimation: a Unified Approach (1997)

Large-scale structure distorts the images of background galaxies, which allows one to measure directly the projected distribution of dark matter in the universe and determine its power spectrum. Here...

A Complete Treatment of CMB Anisotropies in a FRW Universe (1997)

We present a unified approach to the problems of reconstruction of large-scale structure distribution in the universe and determination of the underlying power spectrum. These have often been treated...

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...

The Scalar, Vector and Tensor Contributions to CMB anisotropies from Cosmic Defects (1997)

Turok, Neil, Pen, Ue-Li, Seljak, Uros

Recent work has emphasised the importance of vector and tensor contributions to the large scale microwave anisotropy fluctuations produced by cosmic defects. In this paper we provide a general...

Integral Solution for the Microwave Background Anisotropies in Non-fl at Universes (1997)

Zaldarriaga, Matias, Seljak, Uros, Bertschinger, Edmund

We present an efficient method to compute CMB anisotropies in non-flat universes. First we derive the Boltzmann equation for cosmic microwave background temperature and polarization fluctuations...

Polarization of the Microwave Background in Defect Models (1997)

Seljak, Uros, Pen, Ue-Li, Turok, Neil

We compute the polarization power spectra for global strings, monopoles, textures and nontopological textures, and compare them to inflationary models. We find that topological defect models predict...

Power Spectra in Global Defect Theories of Cosmic Structure Formation (1997)

Pen, Ue-Li, Seljak, Uros, Turok, Neil

An efficient technique for computing perturbation power spectra in field ordering theories of cosmic structure formation is introduced, enabling computations to be carried out with unprecedented...

Cosmological Model Predictions for Weak Lensing: Linear and Nonlinear Regimes (1996)

Jain, Bhuvnesh, Seljak, Uros

Weak lensing by large scale structure induces correlated ellipticities in the images of distant galaxies. The two-point correlation is determined by the matter power spectrum along the line of sight....

An All-Sky Analysis of Polarization in the Microwave Background (1996)

Signature of Gravity Waves in Polarization of the Microwave Background (1996)

Using the formalism of spin-weighted functions we present an all-sky analysis of polarization in the Cosmic Microwave Background (CMB). Linear polarization is a second-rank symmetric and traceless...

Measuring Polarization In Cosmic Microwave Background (1996)

Using spin-weighted decomposition of polarization in the Cosmic Microwave Background (CMB) we show that a particular combination of Stokes $Q$ and $U$ parameters vanishes for primordial fluctuations...

A Line of Sight Approach to Cosmic Microwave Background Anisotropies (1996)

Polarization induced by cosmological scalar perturbations leads to a typical anisotropy pattern, which can best be analyzed in Fourier domain. This allows one to unambiguously distinguish...

Rees-Sciama Effect in a CDM Universe (1995)

We present a new method for calculating linear cosmic microwave background (CMB) anisotropy spectra based on integration over sources along the photon past light cone. In this approach the...

GRAVITATIONAL LENSING EFFECT ON COSMIC MICROWAVE BACKGROUND ANISOTROPIES: A POWER SPECTRUM APPROACH (1995)

The Rees-Sciama (RS) effect produces fluctuations in the cosmic microwave background (CMB) through the time-dependent gravitational potential in the nonlinear stages of evolution. I investigate the...

A Two-Fluid Approximation for Calculating the Cosmic Microwave Background Anisotropies (1994)

The effect of gravitational lensing on cosmic microwave background (CMB) anisotropies is investigated using the power spectrum approach. The lensing effect can be calculated in any cosmological model...

Large Scale Structure Effects on the Gravitational Lens Image Positions and Time Delay (1994)

We present a simple, yet accurate approximation for calculating the cosmic microwave background anisotropy power spectrum in adiabatic models. It consists of solving for the evolution of a two-fluid...