Astrophysics Seminars

Evidence has been accumulating for several decades that many galaxies harbor central mass concentrations that may be in the form of black holes with masses between a few million to a few billion time the mass of the Sun. I will discuss measurements...

The Galactic satellite dSph galaxies are the most dark matter dominated, the smallest, and the lowest luminosity galaxies known. They may well be the first bound objects. Recently we have discovered many, and quantified their structure, and...

We discuss the use of gravitational wave sources as probes of cosmology. The inspiral and merger of a binary system, such as a pair of black holes or neutron stars, is extraordinarily bright in gravitational waves. By observing such systems it is...

Magnetization plays an important role in modern theories of the star-formation process. Slippage of neutrals relative to ions tied to magnetic fields in molecular cloud cores leads to a gravomagneto catastrophe in which the central regions formally...