Low density environments and galaxy evolution

MARÍA LAURA CECCARELLI

Buenos Aires

Workshop; SAN 2023 Workshop; 2023

IAFE

The evolution and properties of galaxies are strongly affected by the local environment. But the large-scale region also has effects on galaxies—for example, galaxies in low-density regions are bluer and more actively star-forming than corresponding galaxies in average environments. The extremely low-dense environment typical of cosmic voids, where merger and interaction expectations are lower than in the field or in groups, and where galaxies live in a region filled with pristine gas, provides an exceptional scenario for examining galaxy evolution. Then, the study of the galaxy population in large voids is crucial to understand the processes involved in the formation and evolution of galaxies. The aim of this work is to examine the effects of underdense environments on galaxy properties compared to other environments. We explore the dependencies of optical colors of galaxies, star formation activity, concentration index, age of the stellar population of galaxies on its relative position with respect to void centers for different void sizes and global environments, using galaxy samples having similar local density and mangitud.