Galaxy evolution with galaxy mergers
Speaker: Takanobu Kirihara (Kitami Institute of Technology)
Abstract:
In the framework of hierarchical structure formation based on cold dark matter, galaxies like the Milky Way grow up through numerous interactions and mergers of many less massive galaxies. These signatures are mainly imprinted in the halo region. In recent years, the Gaia project and the Subaru HSC survey have revealed many tidal remnants in the haloes of the Milky Way and Andromeda galaxy, respectively. In this talk, I will provide an overview of the halo formation process revealed by a combination of observations and numerical simulations, referring to recent observational progress. I also focus on the interaction between massive galaxies. I will introduce the relationship between AGN activity, galaxy density, and interaction of galaxies based on our recent observations and numerical simulations.