Propiedades observacionales de la vecindad galáctica de las galaxias anfitrionas de GRBs largos y cortos.

Abstract

In the present work, we performed a clustering analysis for a group of neighboring galaxies of GRB's host galaxies. The data of the host galaxies is obtained from the GHosts catalog, where all the GRB hosts identified were identified until 2018. A total of 30 host galaxies from this catalog is our sample. The neighboring galaxies were obtained from the Sloan Digital Sky Survey (SDSS) catalog, which has a lot of astronomical objects. The 16th data release from SDSS expanded the fields of observation, number of objects, among others. From the SDSS catalog a total of 1322 neighboring galaxies were obtained. Neighboring galaxies are chosen within a radius of 10 h$^{-1}$Mpc of the hostgalaxy of the GRB. On this wide variety of data, a cluster analysis allows to characterize and find groups, where the number of short GRB neighbors are more likely. The cluster analysis uses the color indices between the g, u, and r channels. This also uses the inverse concentration index (ICI), which is the relationship between the Petrosian flow radiation at 50\% and 90\%. The result of this cluster analysis allows us to find similar observational properties within them. In this way, it is found a relationship between the property of each group with respect to the abundance of GRB host galaxy neighbors.