1.2k citations · 3.9k across the 39 of their papers we have counts for
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The Squeezed Bispectrum from CHIME HI Emission and Planck CMB Lensing: Current Sensitivity and Forecasts
CHIME Collaboration, Arnab Chakraborty, Matt Dobbs +18
Line intensity mapping using atomic hydrogen (HI) has the potential to efficiently map large volumes of the universe if the signal can be successfully separated from overwhelmingly…
Control variates from Eulerian and Lagrangian perturbation theory: Application to the bispectrum
Nickolas Kokron, Shi-Fan Chen
Control variates have seen recent interest as a powerful technique to reduce the variance of summary statistics measured from costly cosmological -body simulations. Of particula…
Direct correlation of line intensity mapping and CMB lensing from evolution along the lightcone
Delon Shen, Nickolas Kokron, Emmanuel Schaan
Line intensity mapping (LIM) promises to probe previously inaccessible corners of the faint and high-redshift universe. However, confusion with bright foregrounds is a major challe…
Local primordial non-Gaussianity from 'zero-bias' 21cm radiation during reionization
Nickolas Kokron
We revisit the potential of 21cm radiation fluctuations, during the epoch of reionization, in constraining the amplitude of local primordial non-Gaussianity (PNG) $f_{\rm NL}^{\rm…
How do uncertainties in galaxy formation physics impact field-level galaxy bias?
Mahlet Shiferaw, Nickolas Kokron, Risa H. Wechsler
Our ability to extract cosmological information from galaxy surveys is limited by uncertainties in the galaxy-dark matter halo relationship for a given galaxy population, which are…
Aemulus : Precision halo mass functions in wCDM cosmologies
Delon Shen, Nickolas Kokron, Joseph DeRose +4
Precise and accurate predictions of the halo mass function for cluster mass scales in cosmologies are crucial for extracting robust and unbiased cosmological informat…
Dynamics-based halo model for large scale structure
Edgar M. Salazar, Eduardo Rozo, Rafael García +4
Accurate modelling of the one-to-two halo transition has long been difficult to achieve. We demonstrate that physically motivated halo definitions that respect the bimodal phase-sp…
On the contributions of extragalactic CO emission lines to ground-based CMB observations
Nickolas Kokron, José Luis Bernal, Jo Dunkley
We investigate the potential of CO rotational lines at redshifts being an appreciable source of extragalactic foreground anisotropies in the cosmic microwave background…
A Lagrangian theory for galaxy shape statistics
Shi-Fan Chen, Nickolas Kokron
We formulate the Lagrangian perturbation theory of galaxy intrinsic alignments and compute the resulting auto and cross power spectra of galaxy shapes, densities and matter to 1-lo…
Beyond the 3rd moment: A practical study of using lensing convergence CDFs for cosmology with DES Y3
D. Anbajagane, C. Chang, A. Banerjee +95
Widefield surveys of the sky probe many clustered scalar fields -- such as galaxy counts, lensing potential, gas pressure, etc. -- that are sensitive to different cosmological and…
Galaxy bias in the era of LSST: perturbative bias expansions
Andrina Nicola, Boryana Hadzhiyska, Nathan Findlay +14
Upcoming imaging surveys will allow for high signal-to-noise measurements of galaxy clustering at small scales. In this work, we present the results of the LSST bias challenge, the…
Aemulus : Precise Predictions for Matter and Biased Tracer Power Spectra in the Presence of Neutrinos
Joseph DeRose, Nickolas Kokron, Arka Banerjee +6
We present the Aemulus simulations: a suite of 150 -body simulations with a mass resolution of $3.51\times 10^{10} \frac{Ω_{cb}}{0.3} ~ h^{-1} M_{\o…
A multi-tracer empirically-driven approach to line-intensity mapping lightcones
Gabriela Sato-Polito, Nickolas Kokron, José Luis Bernal
Line-intensity mapping (LIM) is an emerging technique to probe the large-scale structure of the Universe. By targeting the integrated intensity of specific spectral lines, it captu…
Precision Redshift-Space Galaxy Power Spectra using Zel'dovich Control Variates
Joseph DeRose, Shi-Fan Chen, Nickolas Kokron +1
Numerical simulations in cosmology require trade-offs between volume, resolution and run-time that limit the volume of the Universe that can be simulated, leading to sample varianc…
Accurate predictions from small boxes: variance suppression via the Zel'dovich approximation
Nickolas Kokron, Shi-Fan Chen, Martin White +2
Simulations have become an indispensable tool for accurate modelling of observables measured in galaxy surveys, but can be expensive if very large dynamic range in scale is require…
Cosmological Analysis of Three-Dimensional BOSS Galaxy Clustering and Planck CMB Lensing Cross Correlations via Lagrangian Perturbation Theory
Shi-Fan Chen, Martin White, Joseph DeRose +1
We present a formalism for jointly fitting pre- and post-reconstruction redshift-space clustering (RSD) and baryon acoustic oscillations (BAO) plus gravitational lensing (of the CM…
Neural Network Acceleration of Large-scale Structure Theory Calculations
Joseph DeRose, Shi-Fan Chen, Martin White +1
We make use of neural networks to accelerate the calculation of power spectra required for the analysis of galaxy clustering and weak gravitational lensing data. For modern perturb…
Priors on red galaxy stochasticity from hybrid effective field theory
Nickolas Kokron, Joseph DeRose, Shi-Fan Chen +2
We investigate the stochastic properties of typical red galaxy samples in a controlled numerical environment. We use Halo Occupation Distribution (HOD) modelling to create mock rea…
Cosmological constraints from the tomographic cross-correlation of DESI Luminous Red Galaxies and Planck CMB lensing
Martin White, Rongpu Zhou, Joseph DeRose +15
We use luminous red galaxies selected from the imaging surveys that are being used for targeting by the Dark Energy Spectroscopic Instrument (DESI) in combination with CMB lensing…
Modeling Nearest Neighbor distributions of biased tracers using Hybrid Effective Field Theory
Arka Banerjee, Nickolas Kokron, Tom Abel
We investigate the application of Hybrid Effective Field Theory (HEFT) -- which combines a Lagrangian bias expansion with subsequent particle dynamics from -body simulations --…
Dark Energy Survey Year 3 Results: A 2.7% measurement of Baryon Acoustic Oscillation distance scale at redshift 0.835
DES Collaboration, T. M. C. Abbott, M. Aguena +108
We present angular diameter measurements obtained by measuring the position of Baryon Acoustic Oscillations (BAO) in an optimised sample of galaxies from the first three years of D…
Galaxy Clustering in Harmonic Space from the Dark Energy Survey Year 1 Data: Compatibility with Real-Space Results
F. Andrade-Oliveira, H. Camacho, L. Faga +70
We perform an analysis in harmonic space of the Dark Energy Survey Year 1 Data (DES-Y1) galaxy clustering data using products obtained for the real-space analysis. We test our pipe…
The cosmology dependence of galaxy clustering and lensing from a hybrid -body-perturbation theory model
Nickolas Kokron, Joseph DeRose, Shi-Fan Chen +2
We implement a model for the two-point statistics of biased tracers that combines dark matter dynamics from -body simulations with an analytic Lagrangian bias expansion. Using A…
Dark Energy Survey Year 3 Results: Deep Field Optical + Near-Infrared Images and Catalogue
W. G. Hartley, A. Choi, A. Amon +115
We describe the Dark Energy Survey (DES) Deep Fields, a set of images and associated multi-wavelength catalogue () built from Dark Energy Camera (DECam) and Visible and…