Abstract

Contributed Talk - Splinter jungeAG   (MW-0337)

The "Environmental Impact" on the Star Formation History of Dwarf Galaxies

Malte Przybyl, Prof. Christopher J. Riseley
Ruhr University Bochum

Groups of galaxies have shown to be an exciting environment to study galaxies in. This comes as a result of the different evolution that member galaxies of groups go through compared to field galaxies. Whereas field galaxies tend to evolve largely in isolation, group member galaxies interact with their neighboring galaxies e. g. via interactions or mergers and with the surrounding intragroup medium through processes like ram pressure stripping. While studying the star formation history (SFH) of a single galaxy can give insight into that galaxy’s evolution, studying the SFHs of multiple galaxies inside a group can yield additional information on the evolution of the group. Dwarf galaxies deserve special attention regarding this matter given that they are more easily influenced by neighboring galaxies due to their lower mass and thus lesser gravitational potential. Other notable differences like the lack of large-scale magnetic fields or the commonly more burst-like star formation (SF) in dwarfs justify this focus. Here, I present results from my ongoing Master thesis work based on analyzing DESI DR1 spectra of group galaxies using stellar population synthesis software with a focus on dwarf galaxies. The preliminary results show that dwarfs in some groups undergo bursts of SF at common points in their history unlike their more massive counterparts in the same groups.