Sihan Yuan
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View article: A Unified Photometric Redshift Calibration for Weak Lensing Surveys using the Dark Energy Spectroscopic Instrument
A Unified Photometric Redshift Calibration for Weak Lensing Surveys using the Dark Energy Spectroscopic Instrument Open
The effective redshift distribution $n(z)$ of galaxies is a critical component in the study of weak gravitational lensing. Here, we introduce a new method for determining $n(z)$ for weak lensing surveys based on high-quality redshifts and …
View article: Constraining primordial non-Gaussianity from the large scale structure two-point and three-point correlation functions
Constraining primordial non-Gaussianity from the large scale structure two-point and three-point correlation functions Open
Surveys of cosmological large-scale structure (LSS) are sensitive to the presence of local primordial non-Gaussianity (PNG), and may be used to constrain models of inflation. Local PNG, characterized by $f_{\mathrm{NL}}$, the amplitude of …
View article: A Parameter-masked Mock Data Challenge for Beyond-two-point Galaxy Clustering Statistics*
A Parameter-masked Mock Data Challenge for Beyond-two-point Galaxy Clustering Statistics* Open
The past few years have seen the emergence of a wide array of novel techniques for analyzing high-precision data from upcoming galaxy surveys, which aim to extend the statistical analysis of galaxy clustering data beyond the linear regime …
View article: Dwarf Galaxies at Cosmic Noon: New JWST Constraints on Satellite Models and Subhalo Tidal Evolution
Dwarf Galaxies at Cosmic Noon: New JWST Constraints on Satellite Models and Subhalo Tidal Evolution Open
The advent of JWST has revolutionized the study of faint satellite galaxies at $z \gtrsim 1$, enabling statistical constraints on galaxy evolution and the galaxy$-$halo connection in a previously unexplored mass and redshift regime. We com…
View article: Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1
Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1 Open
We present Galaxy-Galaxy Lensing measurements obtained by cross-correlating spectroscopically observed galaxies from the first data release of the Dark Energy Spectroscopic Instrument (DESI) with source galaxies from the Hyper Suprime-Cam …
View article: Architectural, Geographic, and Interpersonal Space: The Spatial Study of The Remains of the Day
Architectural, Geographic, and Interpersonal Space: The Spatial Study of The Remains of the Day Open
This study is motivated by a particular interest in the spatial dimensions in Kazuo Ishiguro’s novel The Remains of the Day. It focuses on the architectural, geographic, and interpersonal spaces that shape the protagonist’s psychological s…
View article: The DESI One-Percent Survey: Modelling the clustering and halo occupation of all four DESI tracers with UCHUU
The DESI One-Percent Survey: Modelling the clustering and halo occupation of all four DESI tracers with UCHUU Open
We present results from a set of mock lightcones for the DESI One-Percent Survey, created from the U CHUU simulation. This 8 h −3 Gpc 3 N -body simulation comprises 2.1 trillion particles and provides high-resolution dark matter (sub)haloe…
View article: Unraveling emission line galaxy conformity at <i>z</i> ∼ 1 with DESI early data
Unraveling emission line galaxy conformity at <i>z</i> ∼ 1 with DESI early data Open
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 measurements. However, relatively little is known abo…
View article: An analysis of parameter compression and Full-Modeling techniques with Velocileptors for DESI 2024 and beyond
An analysis of parameter compression and Full-Modeling techniques with Velocileptors for DESI 2024 and beyond Open
In anticipation of forthcoming data releases of current and future spectroscopic surveys, we present the validation tests and analysis of systematic effects within velocileptors modeling pipeline when fitting mock data from the AbacusSummi…
View article: Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond
Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond Open
The Dark Energy Spectroscopic Instrument (DESI) will provide unprecedented information about the large-scale structure of our Universe. In this work, we study the robustness of the theoretical modelling of the power spectrum of Folps , a n…
View article: Optimal reconstruction of baryon acoustic oscillations for DESI 2024
Optimal reconstruction of baryon acoustic oscillations for DESI 2024 Open
Baryon acoustic oscillations (BAO) provide a robust standard ruler to measure the expansion history of the Universe through galaxy clustering. Density-field reconstruction is now a widely adopted procedure for increasing the precision and …
View article: A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys Open
In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory mode…
View article: Full Modeling and parameter compression methods in configuration space for DESI 2024 and beyond
Full Modeling and parameter compression methods in configuration space for DESI 2024 and beyond Open
In the contemporary era of high-precision spectroscopic surveys, led by projects like DESI, there is an increasing demand for optimizing the extraction of cosmological information from clustering data. This work conducts a thorough compari…
View article: A comparison between ShapeFit compression and Full-Modelling method with PyBird for DESI 2024 and beyond
A comparison between ShapeFit compression and Full-Modelling method with PyBird for DESI 2024 and beyond Open
DESI aims to provide one of the tightest constraints on cosmological parameters by analysing the clustering of more than thirty million galaxies. However, obtaining such constraints requires special care in validating the methodology and e…
View article: HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis
HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis Open
In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analy…
View article: HOD-dependent systematics in Emission Line Galaxies for the DESI 2024 BAO analysis
HOD-dependent systematics in Emission Line Galaxies for the DESI 2024 BAO analysis Open
The Dark Energy Spectroscopic Instrument (DESI) will provide precise measurements of Baryon Acoustic Oscillations (BAO) to constrain the expansion history of the Universe and set stringent constraints on dark energy. Therefore, precise con…
View article: Extensive analysis of reconstruction algorithms for DESI 2024 baryon acoustic oscillations
Extensive analysis of reconstruction algorithms for DESI 2024 baryon acoustic oscillations Open
Reconstruction of the baryon acoustic oscillation (BAO) signal has been a standard procedure in BAO analyses over the past decade and has helped to improve the BAO parameter precision by a factor of ~2 on average. The Dark Energy Spectrosc…
View article: Baryon acoustic oscillation theory and modelling systematics for the DESI 2024 results
Baryon acoustic oscillation theory and modelling systematics for the DESI 2024 results Open
This paper provides a comprehensive overview of how fitting of baryon acoustic oscillations (BAO) is carried out within the upcoming Dark Energy Spectroscopic Instrument’s (DESI) 2024 results using its DR1 data set, and the associated syst…
View article: Optimizing Task Offloading for Power Line Inspection in Smart Grid Networks with Edge Computing: A Game Theory Approach
Optimizing Task Offloading for Power Line Inspection in Smart Grid Networks with Edge Computing: A Game Theory Approach Open
In the power grid, inspection robots enhance operational efficiency and safety by inspecting power lines for information sharing and interaction. Edge computing improves computational efficiency by positioning resources close to the data s…
View article: Redshift evolution and covariances for joint lensing and clustering studies with DESI Y1
Redshift evolution and covariances for joint lensing and clustering studies with DESI Y1 Open
Galaxy–galaxy lensing (GGL) and clustering measurements from the Dark Energy Spectroscopic Instrument Year 1 (DESI Y1) data set promise to yield unprecedented combined-probe tests of cosmology and the galaxy–halo connection. In such analys…
View article: Systematic Effects in Galaxy-Galaxy Lensing with DESI
Systematic Effects in Galaxy-Galaxy Lensing with DESI Open
The Dark Energy Spectroscopic Instrument (DESI) survey will measure spectroscopic redshifts for millions of galaxies across roughly of the sky. Cross-correlating targets in the DESI survey with complementary imaging surveys allo…
View article: Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey
Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey Open
Supplementary material to DESI's publication "Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey" to comply with the data management plan. This includes the Python scripts and data points required…
View article: Bounds on galaxy stochasticity from halo occupation distribution modeling
Bounds on galaxy stochasticity from halo occupation distribution modeling Open
The joint probability distribution of matter overdensity and galaxy counts in cells is a powerful probe of cosmology, and the extent to which variance in galaxy counts at fixed matter density deviates from Poisson shot noise is not fully u…
View article: Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey
Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey Open
Accurate mock galaxy catalogues are crucial to validate analysis pipelines used to constrain dark energy models. We present a fast HOD-fitting method which we apply to the AbacusSummit simulations to create a set of mock catalogues for the…
View article: <tt>SUNBIRD</tt>: a simulation-based model for full-shape density-split clustering
SUNBIRD: a simulation-based model for full-shape density-split clustering Open
Combining galaxy clustering information from regions of different environmental densities can help break cosmological parameter degeneracies and access non-Gaussian information from the density field that is not readily captured by the sta…
View article: Precise cosmological constraints from BOSS galaxy clustering with a simulation-based emulator of the wavelet scattering transform
Precise cosmological constraints from BOSS galaxy clustering with a simulation-based emulator of the wavelet scattering transform Open
For this study, we perform a reanalysis of the BOSS CMASS DR12 galaxy dataset using a simulation-based emulator for the wavelet scattering transform (WST) coefficients. Moving beyond our previous works, which laid the foundation for the fi…
View article: Cosmological constraints from density-split clustering in the BOSS CMASS galaxy sample
Cosmological constraints from density-split clustering in the BOSS CMASS galaxy sample Open
We present a clustering analysis of the BOSS DR12 CMASS galaxy sample, combining measurements of the galaxy two-point correlation function and density-split clustering down to a scale of $1 \, h^{-1}\, \text{Mpc}$. Our theoretical framewor…
View article: Comparing Compressed and Full-modeling Analyses with FOLPS: Implications for DESI 2024 and beyond
Comparing Compressed and Full-modeling Analyses with FOLPS: Implications for DESI 2024 and beyond Open
The Dark Energy Spectroscopic Instrument (DESI) will provide unprecedented information about the large-scale structure of our Universe. In this work, we study the robustness of the theoretical modelling of the power spectrum of FOLPS, a no…
View article: A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys Open
In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory mode…
View article: A comparison between Shapefit compression and Full-Modelling method with PyBird for DESI 2024 and beyond
A comparison between Shapefit compression and Full-Modelling method with PyBird for DESI 2024 and beyond Open
DESI aims to provide one of the tightest constraints on cosmological parameters by analysing the clustering of more than thirty million galaxies. However, obtaining such constraints requires special care in validating the methodology and e…