295 citations · 1.5k across the 38 of their papers we have counts for
33 papers · 1 filter
Measuring using DESI Legacy Imaging Surveys Emission-Line Galaxies and Planck CMB Lensing and the Impact of Dust on Parameter Inference
Tanveer Karim, Sukhdeep Singh, Mehdi Rezaie +39
Measuring the growth of structure is a powerful probe for studying the dark sector, especially in light of the tension between primary CMB anisotropy and low-redshift surveys…
Third-order intrinsic alignment of SDSS BOSS LOWZ galaxies
Laila Linke, Susan Pyne, Benjamin Joachimi +4
Cosmic shear is a powerful probe of cosmology, but it is affected by the intrinsic alignment (IA) of galaxy shapes with the large-scale structure. Upcoming surveys like Euclid and…
Matching Cosmic Shear Analysis in Harmonic and Real Space
Andy Park, Sukhdeep Singh, Xiangchong Li +2
Recent cosmic shear analyses have exhibited discrepancies of up to between the inferred cosmological parameters when analyzing summary statistics in real space versus harmonic…
Increasing the power of weak lensing survey data with multipole-based intrinsic alignment estimators
Sukhdeep Singh, Ali Shakir, Yesukhei Jagvaral +1
It has long been known that galaxy shapes align coherently with the large-scale density field. Characterizing this effect is essential to interpreting measurements of weak gravitat…
On the impact of the galaxy window function on cosmological parameter estimation
Tanveer Karim, Mehdi Rezaie, Sukhdeep Singh +1
One important source of systematics in galaxy redshift surveys comes from the estimation of the galaxy window function. Up until now, the impact of the uncertainty in estimating th…
RSD measurements from BOSS galaxy power spectrum using the halo perturbation theory model
Byeonghee Yu, Uros Seljak, Yin Li +1
We present growth of structure constraints from the cosmological analysis of the power spectrum multipoles of SDSS-III BOSS DR12 galaxies. We use the galaxy power spectrum model of…
Snowmass2021 Cosmic Frontier White Paper: Enabling Flagship Dark Energy Experiments to Reach their Full Potential
Jonathan A. Blazek, Doug Clowe, Thomas E. Collett +25
A new generation of powerful dark energy experiments will open new vistas for cosmology in the next decade. However, these projects cannot reach their utmost potential without data…
Intrinsic alignments of galaxies around cosmic voids
William d'Assignies D., Nora Elisa Chisari, Nico Hamaus +1
The intrinsic alignments of galaxies, i.e., the correlation between galaxy shapes and their environment, are a major source of contamination for weak gravitational lensing surveys.…
A fast estimator for quantifying the shape dependence of the 3D bispectrum
Abinash Kumar Shaw, Somnath Bharadwaj, Debanjan Sarkar +3
The dependence of the bispectrum on the size and shape of the triangle contains a wealth of cosmological information. Here we consider a triangle parameterization which allows us t…
Improved Master for the LSS: Fast and accurate analysis of the two point power spectra and correlation functions
Sukhdeep Singh
We review the methodology for measurements of two point functions of the cosmological observables, both power spectra and correlation functions. For pseudo- estimators, we…
An Analytic Hybrid Halo + Perturbation Theory Model for Small-scale Correlators: Baryons, Halos, and Galaxies
James M. Sullivan, Uros Seljak, Sukhdeep Singh
We update Halo Zeldovich Perturbation Theory (HZPT), an analytic model for the two-point statistics of dark matter, to describe halo and galaxy clustering, and galaxy-matter cross-…
Does Concentration Drive the Scatter in the Stellar-to-Halo Mass Relation of Galaxy Clusters?
Ying Zu, Huanyuan Shan, Jun Zhang +10
Concentration is one of the key dark matter halo properties that could drive the scatter in the stellar-to-halo mass relation of massive clusters. We derive robust photometric stel…
On the halo-mass and radial scale dependence of the lensing is low effect
Johannes U. Lange, Alexie Leauthaud, Sukhdeep Singh +4
The canonical CDM cosmological model makes precise predictions for the clustering and lensing properties of galaxies. It has been shown that the lensing amplitude of galaxies in…
Dark Energy Survey Year 1 Results: Constraining Baryonic Physics in the Universe
Hung-Jin Huang, Tim Eifler, Rachel Mandelbaum +74
Measurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the f…
Testing General Relativity on cosmological scales at redshift z ~ 1.5 with quasar and CMB lensing
Yucheng Zhang, Anthony R. Pullen, Shadab Alam +10
We test general relativity (GR) at the effective redshift by estimating the statistic , a probe of gravity, on cosmological scales $19 - 190\,h^{-1}{\rm Mpc…
Fundamental Plane of BOSS galaxies: Correlations with galaxy properties, density field and impact on RSD measurements
Sukhdeep Singh, Byeonghee Yu, Uroš Seljak
Fundamental plane of elliptical galaxies can be used to predict the intrinsic size of galaxies and has a number of plausible application to study cosmology and galaxy physics. We p…
High mass and halo resolution from fast low resolution simulations
Biwei Dai, Yu Feng, Uros Seljak +1
Generating mocks for future sky surveys requires large volumes and high resolutions, which is computationally expensive even for fast simulations. In this work we try to develop nu…
Cosmology with galaxy-galaxy lensing on non-perturbative scales: Emulation method and application to BOSS LOWZ
Benjamin D. Wibking, David H. Weinberg, Andrés N. Salcedo +5
We describe our nonlinear emulation (i.e., interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias model with -body simulations of nonlinear st…
Deep+Wide Lensing Surveys will Provide Exquisite Measurements of the Dark Matter Halos of Dwarf Galaxies
Alexie Leauthaud, Sukhdeep Singh, Yifei Luo +5
The advent of new deep+wide photometric lensing surveys will open up the possibility of direct measurements of the dark matter halos of dwarf galaxies. The HSC wide survey will be…
Non-Gaussianity in the Weak Lensing Correlation Function Likelihood -- Implications for Cosmological Parameter Biases
Chien-Hao Lin, Joachim Harnois-Déraps, Tim Eifler +4
We study the significance of non-Gaussianity in the likelihood of weak lensing shear two-point correlation functions, detecting significantly non-zero skewness and kurtosis in one-…
Deep Multi-object Spectroscopy to Enhance Dark Energy Science from LSST
Jeffrey A. Newman, Jonathan Blazek, Nora Elisa Chisari +14
Community access to deep (i ~ 25), highly-multiplexed optical and near-infrared multi-object spectroscopy (MOS) on 8-40m telescopes would greatly improve measurements of cosmologic…
Wide-field Multi-object Spectroscopy to Enhance Dark Energy Science from LSST
Rachel Mandelbaum, Jonathan Blazek, Nora Elisa Chisari +12
LSST will open new vistas for cosmology in the next decade, but it cannot reach its full potential without data from other telescopes. Cosmological constraints can be greatly enhan…
Core Cosmology Library: Precision Cosmological Predictions for LSST
Nora Elisa Chisari, David Alonso, Elisabeth Krause +27
The Core Cosmology Library (CCL) provides routines to compute basic cosmological observables to a high degree of accuracy, which have been verified with an extensive suite of valid…
Cosmological constraints from galaxy-lensing cross correlations using BOSS galaxies with SDSS and CMB lensing
Sukhdeep Singh, Rachel Mandelbaum, Uroš Seljak +2
We present cosmological parameter constraints based on a joint modeling of galaxy-lensing cross correlations and galaxy clustering measurements in the SDSS, marginalizing over smal…