Influence of interactions on properties of central galaxies and satellites in SDSS

COLDWELL, GEORGINA V; ALONSO, MA. SOL; JOSE LUIS NILO CASTELLON; MESA, VALERIA; GARCÍA LAMBAS, DIEGO

Online (Via Zoom Platform)

Congreso; XVI SOCHIAS Annual Meeting; 2020

SOCHIAS

In this work, a sample of galaxy systems is presented, consisting of a central object and two satellites, obtained from the Sloan Digital Sky Survey (SDSS-DR14).The sample was obtained by adopting criteria of projected distance (rp<150h −1 kpc) and radial velocity difference (∆V<500 km s −1 ) restricting objects of at least 1.5 magnitudes weaker than their central galaxy. In addition, an isolation criterion was used to avoid belonging to larger structures, considering that within a radius of 500h −1 kpc and ∆V<1000 km s −1 there is no other bright galaxy. The interactionbetween the members of each system was also classified through visualinspection. We have considered samples of satellites and central galaxiesseparately, and each of these samples is compared with suitable control samples to analyze the results. The objective of this study consists in the analysis of the different scenarios in which these systems are found and their influence on the properties of the galaxies that compose them.