Galaxies Caught in Transition: The Role of Group Environment in Shaping the Mass–Size Relation in the Local Universe

The Astrophysical Journal 2026 Open access

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Authors: Gissel P. Montaguth, Claudia Mendes de Oliveira, Círia Lima-Dias, Antonela Monachesi, S. Torres-Flores, Eduardo Telles, Fábio R. Herpich, Yolanda Jiménez-Teja, Antonio Kanaan, Tiago Nery Ribeiro, W. Schoenell
DOI: 10.3847/1538-4357/ae42ca
Cited by: 1
References: 75

Abstract

Abstract The stellar mass–size relation is a sensitive probe of how environment shapes galaxy structure. We analyse this relation in the local Universe for galaxies in compact groups (CGs), low-mass groups ( M vir ≤ 10 13 M ⊙ ), and high-mass groups, comparing them to field galaxies using data from the Southern Photometric Local Universe Survey. Galaxies are classified as early-type galaxies (ETGs; n ≥ 2.5, ( u − r ) 0 ≥ 2.2), late-type galaxies (LTGs; n < 2.5, ( u − r ) 0

Fields of Study & Subjects

Galaxies: Formation Evolution Phenomena Astronomy and Astrophysical Research Stellar planetary and galactic studies

Publication details

Journal / source
The Astrophysical Journal
Publisher
American Astronomical Society
Volume
999
Issue
2
Pages
160–160
Publication date
2 March 2026
Language
EN