Bustos-Espinoza, Roy Omar Edgar
Bolivia Instituto de Astrofísica – Pontificia Universidad Católica de Chile (IA-PUC)
Perturbation effects and the evolution of giant Low Surface Brightness Galaxies: the case of Malin 1
Low surface brightness galaxies (LSBGs) dominate the volume density of galaxies in the universe; however, given their low surface brightness, they are difficult to detect, introducing biases in the statistical analysis of galaxy populations. A correct and complete theory of galaxy formation and evolution should include them. Giant low surface brightness disk galaxies (gLSBGs), on the other hand, have extended neutral Hydrogen. One of the most impressive gLSBGs is Malin 1, given its 200 kpc stellar disk with giant spiral arms, a flat rotation curve, low star formation, low dust, and a possible giant dark matter halo. Its environment shows at least three possible interacting galaxies, exo-Malin 1, Malin 1A and Malin 1B. Also, it is apparent a giant stellar stream extending from Malin 1 centre to a galaxy located to the NE, the so-called galaxy exo-Malin 1. Finally, a possible hole or cavity within its disk is observed at the south of the disk of Malin 1. These features could be evidence of past or current perturbations in Malin 1. In this work, we are proposing to study perturbation effects and their impact on the evolution of this type of galaxies, all focused on Malin 1. To do that, we will use N -body simulations constrained by observations. This will allow us to model the internal and orbital evolutionary histories of Malin 1 and its satellite candidates, which will in turn allow us to improve the galaxy formation and evolution models for gLSB galaxies in general.