Low surface brightness galaxies in Pegasus I

GONZÁLEZ, N.; SMITH CASTELLI, A. V.; CELLONE, S.; FAIFER, F.; ESCUDERO, C.

La Serena

Congreso; Galaxies Groups and Clusters III: Laboratories to study galaxy evolution; 2023

Universidad de La Serena y Universidad de Talca

Low surface brightness (LSB) galaxies are observationally challenging objects as their surface brightnesses can be 2-3 magnitudes fainter than that of the night sky. Thanks to the access to space and 8-m class telescopes, the study of these objects has experienced a significant progress in the last decade. Although spectroscopy provides relevant information, like radial velocities, ages and abundances, it is still technically unreachable for most LSBs, while photometry is capable of providing a valuable census of their number, projected spatial distribution, luminosities, colors and structural parameters. In this poster we present the progress on a Doctoral Thesis developed at Facultad de Ciencias Astronómicas y Geofísicas of Universidad Nacional de La Plata (Argentina) which studies LSB galaxies in the group Pegasus I using Gemini-GMOS imaging data. We analyze the photometric properties and projected distribution within the virial radius of likely LSB members, selected according to morphological criteria, as well as those of a set of candidates to be Andromeda satellites-like galaxies. From this analysis we expect to get some preliminary clues about the evolutionary path of these challenging objects in groups of galaxies.