In the shadows of bright neighbors: The case of CGCG014-074 and NGC4546

GUEVARA, NATALIA; ESCUDERO, CARLOS G.; FAIFER, FAVIO R.

Montevideo

Congreso; XVII Reunión Regional Latinoamericana de la UAI; 2023

Unión Astronómica Internacional

Early-type dwarf galaxies (ellipticals and lenticulars) represent the numerically dominant population of galaxies in the central regions of rich groups and clusters in the local Universe. As for their origin, several authors postulate that they are the result of the transformation of disk galaxies that fall into these groups and clusters and that this transformation is due to the interaction with the intracluster medium and the other surrounding galaxies. However, the presence of low-luminosity early-type galaxies in low-density environments poses a challenge to this scenario, and the origin of these galaxies in such environments remains unclear. It is therefore crucial to study these stellar systems in poor groups and the field, focusing on exploring their morphology, dynamics, stellar populations, and observational properties, all of which can help trace their evolutionary history. In this context, we present a comprehensive photometric and spectroscopic analysis of the lenticular dwarf galaxy CGCG014-074, located at a distance of 14 Mpc, using excellent quality data obtained by the Gemini Observatory. Our study en-tails an exploration of the photometric properties, stellar formation history, and internal kinematics of CGCG014-074 in order to discuss the evolutionary past of the galaxy and the possible genetic link it shares with its neighbour, the massive lenticular galaxy NGC 4546.