Showing 2025 · astro-ph.GAShow all

12 papers · 2 filters

astro-ph.GA2025

The DESI Single Fiber Lens Search. I. Four Thousand Spectroscopically Selected Galaxy-Galaxy Gravitational Lens Candidates

Juliana S. M. Karp, David J. Schlegel, Xiaosheng Huang +47

We present 4,110 strong gravitational lens candidates, 3,887 of which are new discoveries, selected from a sample of 5,837,154 luminous red galaxies (LRGs) observed with the Dark E…

astro-ph.GA2025★ 2 cited

DELVE Milky Way Satellite Galaxy Census I: Satellite Population and Survey Selection Function in DES, DELVE, and Pan-STARRS

C. Y. Tan, A. Drlica-Wagner, A. B. Pace +84

The properties of Milky Way satellite galaxies have important implications for galaxy formation, reionization, and the fundamental physics of dark matter. However, the population o…

astro-ph.GA2025★ 6 cited

Mapping the Distant and Metal-Poor Milky Way with SDSS-V

Vedant Chandra, Phillip A. Cargile, Alexander P. Ji +28

The fifth-generation Sloan Digital Sky Survey (SDSS-V) is conducting the first all-sky low-resolution spectroscopic survey of the Milky Way's stellar halo. We describe the stellar…

astro-ph.GA2025★ 5 cited

Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release

Bokyoung Kim, Sergey E. Koposov, Ting S. Li +41

We report five nearby ( kpc) stellar substructures in the Galactic halo from a subset of 138,661 stars in the Dark Energy Spectroscopic Instrument (DESI) Mi…

astro-ph.GA2025★ 2 cited

DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [OII] Luminosity

T. Hagen, K. S. Dawson, Z. Zheng +49

We measure the projected two-point correlation functions of emission-line galaxies (ELGs) from the Dark Energy Spectroscopic Instrument (DESI) One-Percent Survey and model their de…

astro-ph.GA2025★ 4 cited

Polarization Studies in Different Blazar Types. Part I: Correlation between Optical Brightness and Polarization Degree

E. A. Shkodkina, S. S. Savchenko, D. A. Morozova +11

We present an analysis of the cross-correlation between optical brightness and polarization degree in different types of blazars. The aim is to identify objects with simultaneous a…

astro-ph.GA2025★ 1 cited

The Cocytos Stream: A Disrupted Globular Cluster from our Last Major Merger?

Christian Aganze, Vedant Chandra, Risa H. Wechsler +48

The census of stellar streams and dwarf galaxies in the Milky Way provides direct constraints on galaxy formation models and the nature of dark matter. The DESI Milky Way survey --…

astro-ph.GA2025★ 1 cited

The DESI Y1 RR Lyrae catalog I: Empirical modeling of the cyclic variation of spectroscopic properties and a chemodynamical analysis of the outer halo

Gustavo E. Medina, Ting S. Li, Sergey E. Koposov +44

We present the catalog of RR Lyrae stars (RRLs) observed in the first year of operations of the Dark Energy Spectroscopic Instrument (DESI) survey. This catalog contains 6,240 RRLs…

astro-ph.GA2025★ 3 cited

HST Grism Observations of a z~1.8 Cluster Candidate from the Clusters Occupied by Bent Radio AGN (COBRA) Survey

Courtney B. Watson, Elizabeth L. Blanton, Emmet Golden-Marx +4

We present new Hubble Space Telescope/Wide Field Camera 3 G141 grism observations for COBRA1411+3415, originally identified as a high-redshift cluster candidate in the Clusters Occ…

astro-ph.GA2025

Measuring Scaling Relationships: Fitting Technique Matters

Bryanne McDonough, Olivia Curtis, Tereasa Brainerd

Scaling relationships, both integrated and spatially resolved, arise due to the physical processes that govern galaxy evolution and are frequently measured in both observed and sim…

astro-ph.GA2025★ 8 cited

PAC in DESI. I. Galaxy Stellar Mass Function into the Frontier

Kun Xu, Y. P. Jing, Shaun Cole +34

The Photometric Objects Around Cosmic Webs (PAC) method integrates cosmological photometric and spectroscopic surveys, offering valuable insights into galaxy formation. PAC measure…

astro-ph.GA2025★ 7 cited

The Solar System's passage through the Radcliffe wave during the middle Miocene

E. Maconi, J. Alves, C. Swiggum +14

Context. As the Solar System orbits the Milky Way, it encounters various Galactic environments, including dense regions of the interstellar medium (ISM). These encounters can compr…