Gas condensation in Brightest Group Galaxies unveiled with MUSE
Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, KY 40506, USA
Published online: 7 September 2022
How central galaxies in groups acquired their cold gas is still not fully understood. To unfold this unknown, we map the kinematics and distribution of the optical emission-line gas using MUSE observations of 18 optically selected local brightest group galaxies (BGGs). The observations reveal a distribution of gas morphologies, including complex networks of filaments extending up to ∼10 kpc to compact (<3 kpc) and extended (>5 kpc) disk-dominated structures. By exploring the thermodynamical properties of the X-ray atmospheres, we find most of the filaments and compact have are likely cooled out from the intragroup medium (IGrM).
© The Authors, Published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).