YCAA Seminar - Sukanya Chakrabarti
Tuesday, October 24, 2017 - 2:30am
- Sukanya Chakrabarti
"Outer HI Disks: Probes of dark matter sub-structure to LIGO sources"
The outer gas disks of spiral galaxies extend far beyond the stellar disk, are cold, have low metal content and a low level of star formation. Because they are cold and extended, they can serve as ideal “detectors” of the gravitational signatures
of dark-matter dominated dwarf galaxies. I will first review our work in analyzing disturbances
in outer gas disks to characterize galactic companions. Since low-metallicity star formation
can produce more detectable compact binaries than typical star formation, outer HI disks
may be conducive to producing a rich population of binary black holes. I will also discuss
our preliminary work on the contribution of outer HI disks to LIGO’s observable population of
binary black holes.
Watson Center A-51
60 Sachem StreetNew Haven, CT 06511