1.9k citations · 4k across the 79 of their papers we have counts for
86 papers
Enabling Polyspectra via Stochastic Realizations of Inverse Decay Curvature Perturbations in Axion Inflation
Matthew A. Reinhard, Zachary Slepian, Atsushi Taruya
Current and upcoming galaxy-redshift surveys offer a promising path for constraining inflationary physics. These constraints are often imposed by relating correlations of the primo…
Testing the 4-Point Correlation Function as a Probe of Parity Violation with the Quijote-Odd Simulations
William Ortolá Leonard, Zachary Slepian, Alex Krolewski +1
We investigate parity violation searches with the 4-Point Correlation Function (4PCF) using the Quijote and Quijote-Odd halo catalogs. Specifically, we explore the auto- and cross-…
A Finely-Binned Measurement of the Connected Even-Parity Galaxy 4-Point Correlation Function of DESI Year 1 Luminous Red Galaxies
William Ortolá Leonard, Alex Krolewski, Zachary Slepian +46
We present the connected even-parity galaxy 4-Point Correlation Function (4PCF) of DESI Year 1 (Y1) Luminous Red Galaxies (LRGs). This is one of the first measurements of the conne…
A Two-Dimensional Test of Cosmological Parity Violation with the 3-Point Correlation Function
William Ortolá Leonard, Zachary Slepian
Searches for parity violation (PV) in the Universe's large-scale structure have recently been carried out using parity-odd modes of the galaxy 4-Point Correlation Function (4PCF).…
A Path to an All-Sky Survey with Roman
Jiwon Jesse Han, Anirudh Chiti, Kai-Feng Chen +93
A deep, space-based, all-sky near-infrared survey carried out with the Nancy Grace Roman Space Telescope would constitute a foundational astronomical infrastructure for decades to…
First Detection of the Baryon Acoustic Oscillation (BAO) Feature in the 3-Point Correlation Function of DESI DR1 Luminous Red Galaxies
Farshad Kamalinejad, Zachary Slepian, Alex Krolewski +55
We present the first detection of the 3-Point Correlation Function (3PCF) Baryon Acoustic Oscillation (BAO) signal from the DESI Data Release 1 (DR1) sample of Luminous Red Galaxie…
Illuminating the Physics of Cosmic Origin and Evolution: A UK Space Frontiers 2035 White Paper
Florian Beutler, Eva-Maria Mueller, Seshadri Nadathur +61
Understanding the Universe's origins and evolution remains one of the most fundamental challenges in modern cosmology. This white paper explores three key science priorities in thi…
Can the CMB be Odd? Effect of a Parity-Violating Matter 4-Point Function on the Low- CMB Trispectrum
Zachary Slepian, Matthew Reinhard, Michael Bartlett
Here we explore from a theoretical perspective the sensitivity of the primary CMB anisotropy trispectrum to parity violation (PV) in large-scale structure (LSS). We focus on the Sa…
Analytical Template for the 4-Point Correlation Function Covariance Beyond the Gaussian Random Field : 1-Loop Corrections with Third-Order Densities
William Ortolá Leonard, Zachary Slepian
Analytical templates for the 4-Point Correlation Function (4PCF) covariance matrix have been developed in the past assuming a Gaussian Random Field (GRF). In this work, we present…
Analytical Template for the 4-Point Correlation Function Covariance Beyond the Gaussian Random Field : 1-Loop Corrections involving Second-Order Densities
William Ortolá Leonard, Zachary Slepian
Analytical templates for the covariance matrix of the 4-Point Correlation Function (4PCF) have been developed in the past assuming a Gaussian Random Field (GRF). In this work, we p…
Study of the Connected Four-Point Correlation Function of Galaxies from DESI Data Release 1 Luminous Red Galaxy Sample
J. Hou, R. N. Cahn, J. Aguilar +43
We present a measurement of the non-Gaussian four-point correlation function (4PCF) from the DESI DR1 Luminous Red Galaxy (LRG) sample. For the gravitationally induced parity-even…
Measurement of Parity-Violating Modes of the Dark Energy Spectroscopic Instrument (DESI) Year 1 Luminous Red Galaxies' 4-Point Correlation Function
Zachary Slepian, Alex Krolewski, Alessandro Greco +38
Here we report the first measurement of the parity-violating (PV) 4-Point Correlation Function (4PCF) of the Dark Energy Spectroscopic Instrument's Year 1 Luminous Red Galaxy (DESI…
Power Spectrum, Bispectrum, 2- and 3-Point Correlation Function, and Beyond
Zachary Slepian, Farshad Kamalinejad, Alessandro Greco
N-Point Correlation Functions, usually with N = 2, 3, and their Fourier-space analogs power spectrum and bispectrum, are major tools used in cosmology to capture the clustering of…
From Theory to Forecast: Neutrino Mass Effects on Mode-Coupling Kernels and Their Observational Implications
Farshad Kamalinejad, Zachary Slepian
We present an analytical expression that gives both the matter and tracer (halo or galaxy) power spectrum with 1-loop corrections that include the neutrino effects on the mode coup…
CMB Lensing Trispectrum as a Probe of Parity Violation in LSS
Alessandro Greco, Zachary Slepian, Jiamin Hou +1
We show that the Cosmic Microwave Background (CMB) lensing trispectrum is sensitive to parity violation in Large-Scale Structure (LSS). We obtain a compact expression for the reduc…
Analytic Model for Covariance Matrices of the 2-, 3-, and 4-Point Correlation Functions in the Gaussian Random Field Approximation
Jessica Chellino, Alessandro Greco, Simon May +1
Analyses of the galaxy N-Point Correlation Functions (NPCFs) have a large number of degrees of freedom, meaning one cannot directly estimate an invertible covariance matrix purely…
First Measurements of the 4-Point Correlation Function of Magnetohydrodynamic Turbulence as a Novel Probe of the Interstellar Medium
Victoria Williamson, James Sunseri, Zachary Slepian +2
In the Interstellar Medium (ISM), gas and dust evolve under magnetohydrodynamic (MHD) turbulence. This produces dense, non-linear structures that then seed star formation. Observat…
Full Parity-Violating Trispectrum in Axion Inflation: Reduction to Low-D Integrals
Matthew Reinhard, Zachary Slepian, Jiamin Hou +1
Recent measurements of the galaxy 4-Point Correlation Function (4PCF) have seemingly detected non-zero parity-odd modes at high significance. Since gravity, the primary driver of g…
An automated method to detect and characterise semi-resolved star clusters
Amy E. Miller, Zachary Slepian, Elizabeth A. Lada +8
We present a novel method for automatically detecting and characterising semi-resolved star clusters: clusters where the observational point-spread function (PSF) is smaller than t…
Can Baryon Acoustic Oscillations Illuminate the Parity-Violating Galaxy 4PCF?
Jiamin Hou, Zachary Slepian, Drew Jamieson
Measurements of the galaxy 4-Point Correlation Function (4PCF) from theSloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey (SDSS BOSS) have recently found strong stati…
Parity-Odd Power Spectra: Concise Statistics for Cosmological Parity Violation
Drew Jamieson, Angelo Caravano, Jiamin Hou +2
We introduce the Parity-Odd Power (POP) spectra, a novel set of observables for probing parity violation in cosmological -point statistics. POP spectra are derived from composit…
On a Generating Function for the Isotropic Basis Functions and Other Connected Results
Zachary Slepian, Jessica Chellino, Jiamin Hou
Recently isotropic basis functions of unit vector arguments were presented; these are of significant use in measuring the N-Point Correlation Functions (NPCFs) of galaxy cluste…
A Model for the Redshift-Space Galaxy 4-Point Correlation Function
William Ortolá Leonard, Zachary Slepian, Jiamin Hou
The field of cosmology is entering an epoch of unparalleled wealth of observational data thanks to galaxy surveys such as DESI, Euclid, and Roman. Therefore, it is essential to hav…
Triple-Spherical Bessel Function Integrals with Exponential and Gaussian Damping: Towards an Analytic N-Point Correlation Function Covariance Model
Jessica Chellino, Zachary Slepian
Spherical Bessel functions appear commonly in many areas of physics wherein there is both translation and rotation invariance, and often integrals over products of several arise. T…