This is a talk held during the regular colloquium series (usually Tuesdays at 4pm).
Over the past 15 years it has become increasingly clear that supermassive black holes are essential components of galaxies, as demonstrated by the correlations connecting black hole masses and galaxy bulge properties.
Galactic winds are an important ingredient in galaxy evolution, but the physics of the ubiquitous outflowing high velocity gas seen from rapidly star-forming galaxies remains unknown.
Anomalous X-ray Pulsars and Soft Gamma-Ray Repeaters (SGRs) are young neutron stars characterized by high X-ray quiescent luminosities, outbursts, and, in the case of SGRs, sporadic giant flares. They are believed to be magnetars, that is neutron stars powered by ultra-strong magnetic fields.
When and how the intergalactic medium (IGM) became reionized carries fundamental implications for the formation of the first galaxies. Several lines of evidence now suggest that hydrogen reionization ended just before z=6. Though not yet conclusive, part of the argument relates to rapid changes