Astronomy and astrophysics

Stellar Collisions in the Galactic Centre

by Jim Dale (Lund Observatory)

Europe/Stockholm
FA 31

FA 31

Description
The Galactic Centre cluster is unusual and interesting for many reasons - it is dominated by the presence of the suppermassive black hole Sag A*, it is the densest stellar cluster known, and it has an unusal stellar population, wiht very young stars in a region where star formation appears to be very unlikley, and a deficit of old giant stars. I will present work in which we investigate the influence of collisions between giant and main sequence stars with stellar-mass black holes in the Galactic Centre. I will focus on the question of whether such encounters can explain the missing red giants in the Galactic Centre and on what clues this might give us about the population of black holes there.