Measuring satellite galaxy subhalo masses in redMaPPer clusters with UNIONS weak lensing data

arXiv:2607.14207 · astro-ph.CO, astro-ph.GA · Submitted 2026-07-15 · Read on arXiv

Roman Akhmetshyn, Jack Elvin-Poole, Michael J. Hudson, Isaac Cheng, Thomas de Boer, Sébastien Fabbro, Sam Farrens, Sacha Guerrini, Axel Guinot, Stephen Gwyn, Hendrik Hildebrandt, Martin Kilbinger, Charlie T. Mpetha, Calum Murray, Ludovic Van Waerbeke, Anna Wittje

astro-ph.CO, astro-ph.GA

Submitted: 2026-07-15

Comments: Accepted for publication to MNRAS as of July 13, 2026. Pending for proofs. DOI: 10.1093/mnras/stag1318

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Weak Lensing — 9× in this paper · explained in 2 episodes
• Accuracy — 2× in this paper · explained in 1 episode
• Brightest Central Galaxy — 2× in this paper
• Calibration — 2× in this paper · explained in 7 episodes
• Dark Energy Spectroscopic Instrument — 2× in this paper
• Gravitational Lensing — 2× in this paper · explained in 2 episodes
• Ultraviolet Near-Infrared Optical Northern Survey — 2× in this paper
• Abundance — 1× in this paper · explained in 1 episode
• Canada-France-Hawaii Telescope — 1× in this paper
• Core — 1× in this paper · explained in 2 episodes
• Selection Bias — 1× in this paper · explained in 4 episodes

Sources

• The Pan-STARRS1 Surveys
• Unions with UNIONS: Using galaxy-galaxy lensing to probe galaxy mergers
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• UNIONS: The Ultraviolet Near-Infrared Optical Northern Survey
• Cross-correlation Weak Lensing of SDSS galaxy Clusters II: Cluster Density Profiles and the Mass--Richness Relation
• Environmental dependence on galaxy-halo connections for satellites using HSC weak lensing

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