Astrophysics Seminars

The X-ray flux of accreting black holes occasionally shows a pair of quasi-periodic oscillations with frequencies in a 3:2 ratio having values comparable to the orbital frequency at the innermost stable circular orbit. The cause and nature of...

Note: This talk is orthogonal to the one he gave at the symposium "The Variable Universe: A Celebration of Bohdan Paczyski" held at Princeton University this September. So this new talk would be of interest even if people saw the symposium talk...

I describe three methods to quantify dark matter clustering, making full use of precision measurements of galaxy clustering and weak lensing from recent galaxy redshift surveys. First, using galaxy clustering measurements on small scales, I infer...

The abundance of heavy elements in the ISM of star-forming galaxies represents a fundamental metric of the galaxy formation process. This metallicity reflects the gas reprocessed by stars, and the metals returned to the ISM by supernova explosions...