Sistemas de Galaxias Pares en Vacíos Cósmicos

MARCOS ROCA; ALONSO, MA. SOL; LAURA CECCARELLI; MESA, VALERIA

Buenos Aires

Congreso; Reunión Anual Asociación Argentina de Astronomía; 2022

Asociación Argentina de Astronomía

We present a catalogue of galaxy pair systems inhabiting the interior of cosmic voids. The galaxy sample consists of a population of 72 pairs with projected separation rp< 100 h-1 kpc and relative radial velocities \bigtriangleup V < 500 s-1 km classified according to their morphological type. We performed comparative statistical analyzes with adjusted control samples in redshif (z), concentration index (C) and absolute magnitude (Mr) of galaxy pairs found in environments of higher density. We analyze different properties from the parameters Dn(4000), specific star formation rate (SFR/M*) and colour index (u-r) and (g-r), concluding that the galaxy pairs that inhabit voids have younger stellar populations, a higher rate of star formation and a bluer color index, with respect to paired galaxies in environments of higher local density.