Testing of the dwarf galaxy content and the evolutionary status of nearby groups of galaxies

TL;DR

This study investigates the dwarf galaxy populations and evolutionary stages of five nearby galaxy groups through morphological searches and spectroscopy, revealing varied dynamical states among the groups.

Contribution

It provides new observational data on dwarf galaxy content and assesses the evolutionary status of different galaxy groups using combined visual, parametric, and spectroscopic methods.

Findings

50% success rate in morphological selection of dwarf galaxies

Different evolutionary states identified among the groups

Some groups are relaxed, others are still assembling

Abstract

We carried out visual and parametric searches for dwarf galaxies in five loose groups of galaxies. Follow-up spectroscopy with the HET has shown a 50% success rate of morphological selection. The evolutionary status of the studied groups differs: while the NGC 6962 group has a partially relaxed core, surrounded by an infall region, the NGC 5005/5033 group and the IC 65 group, which consist only of late-type galaxies, are probably still assembling.