Showing 2025 · astro-ph.COShow all

45 papers · 2 filters

astro-ph.CO2025

Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample

J. Hou, R. N. Cahn, J. Aguilar +33

The parity-odd four-point function provides a unique probe of fundamental symmetries and potential new physics in the large-scale structure of the Universe. We present measurements…

astro-ph.CO2025

Constraining primordial non-Gaussianity from DESI DR1 quasars and Planck PR4 CMB Lensing

Sofia Chiarenza, Alex Krolewski, Marco Bonici +54

We present the first measurement of local-type primordial non-Gaussianity from the cross-correlation between million spectroscopically confirmed quasars from the first data r…

astro-ph.CO2025

A high-significance detection of primordial tidal torque imprints

Ming-Jie Sheng, Hao-Ran Yu, Min Bao +8

Tidal-torque theory predicts that galaxy angular momenta are imprinted by the primordial tidal field acting on proto-structures and that they can retain information about the early…

astro-ph.CO2025★ 5 cited

Dynamical Dark Energy and the Unresolved Hubble Tension: Multi-model Constraints from DESI 2025 and Other Probes

Zhuoming Zhang, Tengpeng Xu, Yun Chen

We present a Bayesian comparative analysis of five cosmological models: CDM, CDM, CDM, CDM (with scalar-field dark energy), and an interacting dark energy scenario…

astro-ph.CO2025

A stringent constraint on the fractional change of proton g-factor

Renzhi Su, Stephen J. Curran, Jeremy Darling +5

We report a constraint on the cosmological variation of the proton g-factor, . By comparing the measured redshifts between \mbox{H\,{\sc i}} 21 cm and OH 18 cm lines observed…

astro-ph.CO2025★ 1 cited

Galaxy-Multiplet Clustering from DESI DR2

Hanyue Wang, Daniel J. Eisenstein, Jessica Nicole Aguilar +44

We present an efficient estimator for higher-order galaxy clustering using small groups of nearby galaxies, or multiplets. Using the Luminous Red Galaxy (LRG) sample from the Dark…

astro-ph.CO2025★ 2 cited

CSST Strong Lensing Preparation: Cosmological Constraints Forecast from CSST Galaxy-Scale Strong Lensing

Hengyu Wu, Yun Chen, Tonghua Liu +6

Strong gravitational lensing by galaxies is a powerful tool for studying cosmology and galaxy structure. The China Space Station Telescope (CSST) will revolutionize this field by d…

astro-ph.CO2025

Probing Dark Matter Substructure with Image Number Anomaly in Strong Lensing Systems

Wenlin Hou, Jianxiang Liu, Kai Liao

Gravitational lensing observables, including anomalies in image positions, flux ratios, and time delays, serve as usual probes of dark matter (DM) substructure. When dark matter su…

astro-ph.CO2025

Artificial Precision Polarization Array: Sensitivity for the axion-like dark matter with clock satellites

Hanyu Jiang, Baoyu Xu, Yun-Long Zhang

The approaches to searching for axion-like signals based on pulsars include observations with pulsar timing arrays (PTAs) and pulsar polarization arrays (PPAs). However, these meth…

astro-ph.CO2025

Detecting dark matter substructure with lensed quasars in optical bands

Jianxiang Liu, Kai Liao, Yan Gong

Flux ratios of multiple images in strong gravitational lensing systems provide a powerful probe of dark matter substructure. Optical flux ratios of lensed quasars are typically aff…

astro-ph.CO2025★ 4 cited

CURLING -- II. Improvement on the Inference from Pixelized Cluster Strong Lens Modeling

Yushan Xie, Huanyuan Shan, Yiping Shu +9

Strongly lensed supernovae (glSNe) provide a powerful, independent method to measure the Hubble constant, , through time delays between their multiple images. The accuracy o…

astro-ph.CO2025★ 1 cited

Reproducing Abell 2744 with the HyperMillennium Simulation

Qiao Wang, Ming Li, Liang Gao +11

We present the Hyper Millennium (HM) simulation, an extremely large cosmological simulation designed to support next-generation galaxy surveys. The simulation follows 4.2 trillion…

astro-ph.CO2025★ 4 cited

Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1

E. A. Zaborowski, P. Taylor, K. Honscheid +58

The sound horizon scale is a key source of information for early-time measurements, and is therefore a common target of new physics proposed to solve the Hubble tension…

astro-ph.CO2025

J-PAS: forecast on the primordial power spectrum reconstruction

Guillermo Martínez-Somonte, Airam Marcos-Caballero, Enrique Martínez-González +27

We investigate the capability of the J-PAS survey to constrain the primordial power spectrum using a non-parametric Bayesian method. Specifically, we analyze simulated power spectr…

astro-ph.CO2025

Clustering analysis of medium-band selected high-redshift galaxies

H. Ebina, M. White, A. Raichoor +57

Next-generation large-scale structure spectroscopic surveys will probe cosmology at high redshifts , relying on abundant galaxy tracers such as Ly emitters (LAE…

astro-ph.CO2025

Detection of HI filament: Pair Stacking vs. Filament Stacking

Yuxi Meng, Jie Wang, Yingjie Jing +2

The faint 21 cm signal emitted by neutral hydrogen in cosmic filaments is expected to be detectable. However, due to its weakness, stacking techniques are required. We assessed two…

astro-ph.CO2025

DESI Strong Lens Foundry III: Keck Spectroscopy for Strong Lenses Discovered Using Residual Neural Networks

Shrihan Agarwal, Xiaosheng Huang, William Sheu +49

We present spectroscopic data of strong lenses and their source galaxies using the Keck Near-Infrared Echellette Spectrometer (NIRES) and the Dark Energy Spectroscopic Instrument (…

astro-ph.CO2025

Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis

R. Gsponer, S. Ramirez-Solano, F. Rodríguez-Martínez +65

We assess the impact of the fiducial cosmology choice on cosmological inference from full-shape (FS) fits of the galaxy power spectrum in the DESI 2024 Data Release 1 (DR1). Using…

astro-ph.CO2025★ 1 cited

Exploring HI Galaxy Redshift Survey Strategies for the FAST Core Array Interferometry

Zhenglong Li, Diyang Liu, Chengliang Xu +2

We explore the feasibility of HI galaxy redshift surveys with the Five-hundred-meter Aperture Spherical Telescope (FAST) and its proposed Core Array interferometry. Using semi-anal…

astro-ph.CO2025

Combined tracer analysis for DESI 2024 BAO

D. Valcin, M. Rashkovetskyi, H. Seo +64

This paper demonstrates how the Dark Energy Spectroscopic Instrument (DESI) Data Release 1 (DR1) and future baryon acoustic oscillations (BAO) analyses can optimally combine overla…

astro-ph.CO2025

Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect

M. Rashkovetskyi, D. J. Eisenstein, J. Aguilar +46

The thermal Sunyaev-Zeldovich (tSZ) effect is associated with galaxy clusters - extremely large and dense structures tracing the dark matter with a higher bias than isolated galaxi…

astro-ph.CO2025

Frequentist Cosmological Constraints from Full-Shape Clustering Measurements in DESI DR1

James Morawetz, Hanyu Zhang, Marco Bonici +53

We present a frequentist analysis of clustering measurements from Data Release 1 of the Dark Energy Spectroscopic Instrument (DESI) using the standard profile likelihood method. Wh…

astro-ph.CO2025

Statistical Strong Lensing as a Test of Conformal Gravity

Li-Xue Yue, Da-Ming Chen

As an alternative gravitational theory to General Relativity (GR), Conformal Gravity (CG) can be verified through astronomical observations. Currently, Mannheim and Kazanas have pr…

astro-ph.CO2025★ 2 cited

Evolution of Cluster Alignments as Evidence of Large-scale Structure Formation in the Universe

Michael J. West, Roberto De Propris, Maret Einasto +2

The universe's large-scale structure forms a vast, interconnected network of filaments, sheets, and voids known as the cosmic web. For decades, astronomers have observed that the o…