GM
Gustavo E. Medina
astro-ph.GAastro-ph.COastro-ph.SRastro-ph.HEastro-ph.IM
On Valency
published · living versionsW_mmcqn6vq·v1 · currentpublished
Exploring the interaction between the MW and LMC with a large sample of blue horizontal branch stars from the DESI survey
with Amanda Byström, Sergey E. Koposov, Sophia Lilleengen, Ting S. Li +40
1 version
W_7gcvn3gd·v1published
W_caq2h6g4·v1published
W_an52ar5m·v1published
Preprints & journals
74 papers in the corpus · 2016–2026Discovery, Characterization, and Potential Origins of a Stream in the Stellar Halo of Nearby LMC-Mass Galaxy NGC 552609.22071v1 · Benjamin N. Velguth, Burcin Mutlu-Pakdil, Erik Tollerud et al.2026 · 0 citationsarXiv
Discovery of the Distant, Ultra-Faint Milky Way Satellite Aquarius IV with the Vera C. Rubin Observatory Early Data Preview 22608.02601v1 · William Cerny, Aashay Pai, Alex Drlica-Wagner et al.2026 · 0 citationsarXiv
Characterizing the disruption of Böotes III: a missing link in the Galactic halo?2607.28594v1 · Jaclyn Jensen, Daniel A. Boyea, Alan W. McConnachie et al.2026 · 0 citationsarXiv
Boötes III is a Tidally Disrupting Ultra-Faint Dwarf Galaxy on an Eccentric Polar Orbit2607.07803v1 · Ting S. Li, Denis Erkal, Andrew B. Pace et al.2026 · 0 citationsarXiv
Deep Imaging of Grus II and Horologium II: Structure and Extent of Two Ultra-Faint Milky Way Satellites2606.25058v1 · Deepthi S. Prabhu, David J. Sand, Anirudh Chiti et al.2026 · 0 citationsarXiv
Discovery and Spectroscopic Characterization of a Distant, Compact Milky Way Satellite in Gemini2606.09975v1 · K. Overdeck, W. Cerny, C. Y. Tan et al.2026 · 0 citationsarXiv
The DECam MAGIC Survey Mapping the Ancient Galaxy in CaHK: Overview and Summary of Early Science2605.26581v1 · A. Chiti, A. Drlica-Wagner, A. B. Pace et al.2026 · 1 citationarXiv
Constraining the Galactic bar using the M92 stellar stream2605.07918v1 · Amanda Bystrom, Sergey E. Koposov, Ting. S. Li et al.2026 · 0 citationsarXiv
Characterizing the GD-1 Stream with DESI DR2 Data: Thin Stream and Hot Cocoon2604.20958v1 · Emma Jarvis, Ting S. Li, Sergey E. Koposov et al.2026 · 0 citationsarXiv
The DECam MAGIC Survey: Investigating the Jet Stellar Stream with Photometric Metallicities2604.13374v2 · H. Q. Do, A. Chiti, P. S. Ferguson et al.2026 · 0 citationsarXiv
The velocity field of our Milky Way outer stellar halo based on DESI DR22604.01628v1 · Songting Li, Wenting Wang, Sergey E. Koposov et al.2026 · 1 citationarXiv
Epicyclic Density Variations in the Indus Stellar Stream2603.09305v1 · Yong Yang, Geraint F. Lewis, Ting S. Li et al.2026 · 0 citationsarXiv
The DECam MAGIC Survey: Uncovering the Tidal Tails of the Crater II Dwarf Galaxy2602.21283v2 · Kaia R. Atzberger, Andrew B. Pace, Nitya Kallivayalil et al.2026 · 0 citationsarXiv
Signatures of a Tidally Induced Spiral Arm at the Anticenter of the Milky Way and a Kinematically Extended Anticenter Stream Using DESI DR22601.14562v2 · Mika Lambert, Constance M. Rockosi, Sergey E. Koposov et al.2026 · 0 citationsarXiv
Detailed Chemical Abundance Analysis of the Brightest Stars in the Turranburra and Willka Yaku Stellar Streams2512.10003v1 · Kaitlin B. Webber, Terese T. Hansen, Jennifer L. Marshall et al.2025 · 0 citationsarXiv
The Milky Way stellar halo is twisted and doubly broken: insights from DESI DR2 Milky Way Survey observation2512.01350v3 · Songting Li, Wenting Wang, Sergey E. Koposov et al.2025 · 7 citationsarXiv
Ultra-Faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 32510.11684v2 · C. Y. Tan, W. Cerny, A. B. Pace et al.2025 · 3 citationsApJ 1000, 46 (2026)
The Draco Dwarf Spheroidal Galaxy in the First Year of DESI Data2509.21822v2 · J. Ding, C. Rockosi, Ting S. Li et al.2025 · 2 citationsarXiv
A DECADE of dwarfs: first detection of weak lensing around spectroscopically confirmed low-mass galaxies2509.20458v1 · Chun-Hao To, Chihway Chang, Dhayaa Anbajagane et al.2025 · 0 citationsarXiv
DELVE Milky Way Satellite Galaxy Census I: Satellite Population and Survey Selection Function in DES, DELVE, and Pan-STARRS2509.12313v2 · C. Y. Tan, A. Drlica-Wagner, A. B. Pace et al.2025 · 5 citationsApJ 1000, 87 (2026)
DECADE+DES Y3 Weak Lensing Mass Map: A 13,000 deg View of Cosmic Structure from 270 Million Galaxies2509.03798v1 · M. Gatti, D. Anbajagane, C. Chang et al.2025 · 2 citationsarXiv
The Dark Energy Camera All Data Everywhere cosmic shear project V: Constraints on cosmology and astrophysics from 270 million galaxies across 13,000 deg of the sky2509.03582v3 · D. Anbajagane, C. Chang, A. Drlica-Wagner et al.2025 · 2 citationsarXiv
Chemodynamics of BoötesI with : Revised Velocity Gradient, Dark Matter Density, and Galactic Chemical Evolution Constraints2509.02546v1 · Nathan R. Sandford, Ting S. Li, Sergey E. Koposov et al.2025 · 1 citationarXiv
The mass of the Milky Way from outer halo stars measured by DESI DR12508.19351v1 · Gustavo E. Medina, Ting S. Li, Gwendolyn M. Eadie et al.2025 · 1 citationarXiv
Not-so-heavy metal(s): Chemical Abundances in the Ultra-faint Dwarf Galaxies Eridanus IV and Centaurus I2508.11012v1 · Mair'ead E Heiger, Alexander P Ji, Ting S Li et al.2025 · 0 citationsarXiv
A second-generation star in a relic dwarf galaxy2508.04053v2 · Anirudh Chiti, Vinicius M. Placco, Andrew B. Pace et al.2025 · 4 citationsarXiv
DELVE-ing into the Milky Way's Globular Clusters: Assessing extra-tidal features in NGC 5897, NGC 7492, and testing detectability with deeper photometry2507.11629v2 · A. Chiti, K. Tavangar, P. S. Ferguson et al.2025 · 2 citationsAstronomical Journal, 170 (2025), 294
The dark matter content of Milky Way dwarf spheroidal galaxies: Draco, Sextans and Ursa Minor2507.02284v3 · Hao Yang, Wenting Wang, Ling Zhu et al.2025 · 5 citationsarXiv
Spectroscopic Analysis of Pictor II: a very low metallicity ultra-faint dwarf galaxy bound to the Large Magellanic Cloud2506.21841v2 · A. B. Pace, T. S. Li, A. P. Ji et al.2025 · 9 citationsarXiv
The DECam MAGIC Survey: Spectroscopic Follow-up of the Most Metal-Poor Stars in the Distant Milky Way Halo2506.19163v1 · Vinicius M. Placco, Guilherme Limberg, Anirudh Chiti et al.2025 · 13 citationsarXiv
DESI Data Release 1: Stellar Catalogue2505.14787v4 · Sergey E. Koposov, Ting S. Li, C. Allende Prieto et al.2025 · 15 citationsOpen Journal Of Astrophysics, Vol 9 (2026)
The DESI Y1 RR Lyrae catalog II: The metallicity dependency of pulsational properties, the shape of the RR Lyrae instability strip, and metal rich RR Lyrae2505.10614v2 · Gustavo E. Medina, Ting S. Li, C. Allende Prieto et al.2025 · 1 citationarXiv
The NGC3109 Satellite System: The First Systematic Resolved Search for Dwarf Galaxies Around a SMC-mass Host2505.05570v1 · Amandine Doliva-Dolinsky, Burcin Mutlu-Pakdil, Denija Crnojevi'c et al.2025 · 0 citationsarXiv
Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release2504.20327v2 · Bokyoung Kim, Sergey E. Koposov, Ting S. Li et al.2025 · 5 citationsMon. Not. R. Astron. Soc. 540 (2025) 264-288
DELVE-DEEP Survey: The Faint Satellite System of NGC 552504.18645v2 · Jonah Medoff, Burcin Mutlu-Pakdil, Jeffrey L. Carlin et al.2025 · 5 citationsApJ 990, 108 (2025)
The Cocytos Stream: A Disrupted Globular Cluster from our Last Major Merger?2504.11687v2 · Christian Aganze, Vedant Chandra, Risa H. Wechsler et al.2025 · 1 citationarXiv
The DECam MAGIC Survey: A Wide-field Photometric Metallicity Study of the Sculptor Dwarf Spheroidal Galaxy2504.03593v2 · Fabr'icia O. Barbosa, Anirudh Chiti, Guilherme Limberg et al.2025 · 5 citationsarXiv
The DESI Y1 RR Lyrae catalog I: Empirical modeling of the cyclic variation of spectroscopic properties and a chemodynamical analysis of the outer halo2504.02924v2 · Gustavo E. Medina, Ting S. Li, Sergey E. Koposov et al.2025 · 1 citationarXiv
UNIONS: The Ultraviolet Near-Infrared Optical Northern Survey2503.13783v1 · Stephen Gwyn, Alan W. McConnachie, Jean-Charles Cuillandre et al.2025 · 24 citationsarXiv
Data Release 1 of the Dark Energy Spectroscopic Instrument2503.14745v2 · M. Abdul Karim, A. G. Adame, D. Aguado et al.2025 · 155 citationsarXivon Valency
A Pristine-UNIONS view on the Galaxy: Kinematics of the distant spur feature of the Sagittarius stream traced by Blue Horizontal Branch stars2502.17319v1 · M. Bayer, E. Starkenburg, G. F. Thomas et al.2025 · 7 citationsA&A 701, A117 (2025)
The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies2502.17674v2 · D. Anbajagane, C. Chang, Z. Zhang et al.2025 · 9 citationsarXiv
The DECADE cosmic shear project II: photometric redshift calibration of the source galaxy sample2502.17675v2 · D. Anbajagane, A. Alarcon, R. Teixeira et al.2025 · 5 citationsarXiv
The DECADE cosmic shear project III: validation of analysis pipeline using spatially inhomogeneous data2502.17676v2 · D. Anbajagane, C. Chang, N. Chicoine et al.2025 · 2 citationsarXiv
The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg of the sky2502.17677v2 · D. Anbajagane, C. Chang, A. Drlica-Wagner et al.2025 · 7 citationsarXiv
Deep Photometric Observations of Ultra-Faint Milky Way Satellites Centaurus I and Eridanus IV2501.04772v2 · Quinn O. Casey, Burcin Mutlu-Pakdil, David J. Sand et al.2025 · 2 citationsarXiv
Exploring the interaction between the MW and LMC with a large sample of blue horizontal branch stars from the DESI survey2410.09149v3 · Amanda Bystrom, Sergey E. Koposov, Sophia Lilleengen et al.2024 · 24 citationsMon Not R Astron Soc (2025) 560-582on Valency
Merian: A Wide-Field Imaging Survey of Dwarf Galaxies at z~0.06-0.102410.01884v2 · Shany Danieli, Erin Kado-Fong, Song Huang et al.2024 · 0 citationsarXiv
Discovery and Spectroscopic Confirmation of Aquarius III: A Low-Mass Milky Way Satellite Galaxy2410.00981v1 · W. Cerny, A. Chiti, M. Geha et al.2024 · 13 citationsarXiv
A Pride of Satellites in the Constellation Leo? Discovery of the Leo VI Milky Way Satellite Galaxy with DELVE Early Data Release 32408.00865v3 · C. Y. Tan, W. Cerny, A. Drlica-Wagner et al.2024 · 21 citationsarXiv
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