Title: Nuclear Activity in Low Luminosity Spiral Galaxies

Speaker: Dr. Mousumi Das (Institute of Astronomy, Bangalore, India)

Time: 13:30, Friday, October 21, 2011

Location: Room 620, Physics Building, NTHU

Abstract: Low Luminosity spiral galaxies are generally dark matter dominated systems that that have extended gas disks but show little star formation. They are thus poorly evolved galaxies and do not show much nuclear activity. However, in our recent studies of these galaxies we find that a significant fraction do have active galactic nuclei (AGN) that are associated with low mass nuclear black holes. Most of these galaxies either have large bulges or are in the process of forming a bulge. In some cases radio lobes or jets are also seen with the AGN activity. This presentation will focus on multi-frequency studies of this nuclear activity and its implications for studies of galaxy evolution.