Propiedades astrofísicas de galaxias en los entornos de vacíos cosmológicos

RODRÍGUEZ MEDRANO, A. M.; STASYSZYN, FEDERICO; PAZ, DANTE JAVIER; RUIZ, ANDRÉS N

Boletín de la Asociación Argentina de Astronomía

Asociación Argentina de Astronomía

Año: 2022 vol. 63 p. 199 - 201

1669-9521

Using a sample of galaxies from the Sloan Digital Sky Server Data Release 16 we identify cosmicvoids and study star formation in galaxies. Based on the well understood dichotomy of voids (some are expandingand some are contracting) we study how these dynamics segregate galaxies into passive and active star-forminggalaxies. We report that expanding voids have a larger population of higher specific star formation rate (sSFR)and bluer galaxies in their walls than those galaxies in the walls of contracting voids. At the same time, we findthat the larger the radius of the voids, the more blue galaxies in their walls have larger sSFRs. In this work wecan confirm that this segregation is purely related to the different evolutionary states of voids, which correlateswith the size of the voids.