98 citations · 687 across the 22 of their papers we have counts for
22 papers
Unraveling emission line galaxy conformity at z~1 with DESI early data
Sihan Yuan, Risa H. Wechsler, Yunchong Wang +32
Emission line galaxies (ELGs) are now the preeminent tracers of large-scale structure at z>0.8 due to their high density and strong emission lines, which enable accurate redshift m…
PROVABGS: The Probabilistic Stellar Mass Function of the BGS One-Percent Survey
ChangHoon Hahn, Jessica Nicole Aguilar, Shadab Alam +33
We present the probabilistic stellar mass function (pSMF) of galaxies in the DESI Bright Galaxy Survey (BGS), observed during the One-Percent Survey. The One-Percent Survey was one…
The DESI One-Percent Survey: Exploring the Halo Occupation Distribution of Luminous Red Galaxies and Quasi-Stellar Objects with AbacusSummit
Sihan Yuan, Hanyu Zhang, Ashley J. Ross +39
We present the first comprehensive Halo Occupation Distribution (HOD) analysis of the DESI One-Percent survey Luminous Red Galaxy (LRG) and Quasi-Stellar Object (QSO) samples. We c…
The DESI One-Percent Survey: Modelling the clustering and halo occupation of all four DESI tracers with Uchuu
F. Prada, J. Ereza, A. Smith +44
We present results from a set of mock lightcones for the DESI One-Percent Survey, created from the Uchuu simulation. This This 8 (Gpc/h)^3 N-body simulation comprises 2.1 trillion…
The DESI One-Percent Survey: Exploring A Generalized SHAM for Multiple Tracers with the UNIT Simulation
Jiaxi Yu, Cheng Zhao, Violeta Gonzalez-Perez +40
We perform SubHalo Abundance Matching (SHAM) studies on UNIT simulations with \{\}-SHAM and \{\}-SHAM. They are designe…
Synthetic light cone catalogues of modern redshift and weak lensing surveys with AbacusSummit
Boryana Hadzhiyska, Sihan Yuan, Chris Blake +32
The joint analysis of different cosmological probes, such as galaxy clustering and weak lensing, can potentially yield invaluable insights into the nature of the primordial Univers…
2D k-th nearest neighbor statistics: a highly informative probe of galaxy clustering
Sihan Yuan, Alvaro Zamora, Tom Abel
Beyond standard summary statistics are necessary to summarize the rich information on non-linear scales in the era of precision galaxy clustering measurements. For the first time,…
First Detection of the BAO Signal from Early DESI Data
Jeongin Moon, David Valcin, Michael Rashkovetskyi +65
We present the first detection of the baryon acoustic oscillations (BAO) signal obtained using unblinded data collected during the initial two months of operations of the Stage-IV…
Full forward model of galaxy clustering statistics with AbacusSummit lightcones
Sihan Yuan, Boryana Hadzhiyska, Tom Abel
Novel summary statistics beyond the standard 2-point correlation function (2PCF) are necessary to capture the full astrophysical and cosmological information from the small-scale (…
Illustrating galaxy-halo connection in the DESI era with IllustrisTNG
Sihan Yuan, Boryana Hadzhiyska, Sownak Bose +1
We employ the hydrodynamical simulation IllustrisTNG to inform the galaxy-halo connection of the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples of the Dark Energy…
Stringent constraints from small-scale galaxy clustering using a hybrid MCMC+emulator framework
Sihan Yuan, Lehman H. Garrison, Daniel J. Eisenstein +1
We present a novel simulation-based hybrid emulator approach that maximally derives cosmological and Halo Occupation Distribution (HOD) information from non-linear galaxy clusterin…
AbacusHOD: A highly efficient extended multi-tracer HOD framework and its application to BOSS and eBOSS data
Sihan Yuan, Lehman H. Garrison, Boryana Hadzhiyska +2
We introduce the AbacusHOD model and present two applications of AbacusHOD and the AbacusSummit simulations to observations. AbacusHOD is an HOD framework written in Python that is…
Constructing high-fidelity halo merger trees in AbacusSummit
Sownak Bose, Daniel J. Eisenstein, Boryana Hadzhiyska +2
Tracking the formation and evolution of dark matter haloes is a critical aspect of any analysis of cosmological -body simulations. In particular, the mass assembly of a halo and…
Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function
Sihan Yuan, Boryana Hadzhiyska, Sownak Bose +2
Building accurate and flexible galaxy-halo connection models is crucial in modeling galaxy clustering on non-linear scales. Recent studies have found that halo concentration by its…
A Hybrid Deep Learning Approach to Cosmological Constraints From Galaxy Redshift Surveys
Michelle Ntampaka, Daniel J. Eisenstein, Sihan Yuan +1
We present a deep machine learning (ML)-based technique for accurately determining and from mock 3D galaxy surveys. The mock surveys are built from the AbacusCosmos sui…
Can Assembly Bias Explain the Lensing Amplitude of the BOSS CMASS Sample in a Planck Cosmology?
Sihan Yuan, Daniel J. Eisenstein, Alexie Leauthaud
In this paper, we investigate whether galaxy assembly bias can reconcile the 20-40% disagreement between the observed galaxy projected clustering signal and the galaxy-galaxy lensi…
Decorrelating the errors of the galaxy correlation function with compact transformation matrices
Sihan Yuan, Daniel J. Eisenstein
Covariance matrix estimation is a persistent challenge for cosmology, often requiring a large number of synthetic mock catalogues. The off-diagonal components of the covariance mat…
Exploring the squeezed three-point galaxy correlation function with generalized halo occupation distribution models
Sihan Yuan, Daniel J. Eisenstein, Lehman H. Garrison
We present the GeneRalized ANd Differentiable Halo Occupation Distribution (GRAND-HOD) routine that generalizes the standard 5 parameter halo occupation distribution model (HOD) wi…
Using galaxy pairs to investigate the three-point correlation function in the squeezed limit
Sihan Yuan, Daniel J. Eisenstein, Lehman H. Garrison
We investigate the three-point correlation function (3PCF) in the squeezed limit by considering galaxy pairs as discrete objects and cross-correlating them with the galaxy field. W…
Spectroscopic Identification of Type 2 Quasars at Z < 1 in SDSS-III/BOSS
Sihan Yuan, Michael A. Strauss, Nadia L. Zakamska
The physics and demographics of type 2 quasars remain poorly understood, and new samples of such objects selected in a variety of ways can give insight into their physical properti…
The Physical Nature of the Most Metal-Poor Damped Lyman Alpha Systems
Sihan Yuan, Renyue Cen
Utilizing the high-resolution, large-scale LAOZI cosmological simulations we investigate the nature of the metal-poor () damped Lyman alpha systems (mpDLA) at …
A new light on 21 cm intensity fluctuations from the dark ages
Yacine Ali-Haïmoud, P. Daniel Meerburg, Sihan Yuan
Fluctuations of the 21 cm brightness temperature before the formation of the first stars hold the promise of becoming a high-precision cosmological probe in the future. The growth…