New Research in Physics

The Mass-Size Relation of Galaxies in Varied Environments

Authors

mohammadreza shojaei
parsa ghafour

Faculty of physics, Kharazmi University

https://doi.org/10.61882/jmrph.7.1.61
Abstract
We investigate the stellar mass-size relation of galaxies and their specific star formation rate (sSFR) in both high-density and low-density environments. The study is based on data obtained from the Millennium simulation in z=0. According to our research, the size of massive elliptical and spiral galaxies is unaffected by their environment. These studies show that low-mass spiral galaxies are larger in voids than in dense environments. Also, among the elliptical galaxies, we observed a group of low-mass galaxies that were more compact despite the same mass. Due to the effects of ram pressure stripping and gravitational interaction, massive spiral galaxies tend to have lower star formation rates. The size of low-mass spiral galaxies is affected by dense environments, resulting in larger sizes in voids. Our analysis indicates that the abundance of cold gas has a greater impact on star formation rate than the halo mass of galaxies in all environments.
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New Research in Physics
Volume 7, Issue 1 - Serial Number 12
September 2022
Pages 61-70

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