Astrophysics Seminars

Understanding whether Helium can sediment to the core of galaxy clusters is important for a number of problems in cosmology and astrophysics. For example, our ignorance in the distribution of Helium leads to systematic uncertainties in estimating...

The expansion history of the Universe prior to Big Bang nucleosynthesis is unknown. This ignorance profoundly limits our understanding of dark matter: we cannot calculate its relic abundance without knowing when the Universe became radiation...

The new era of exoplanetary discovery has begun to allow a statistical understanding of planetary distributions to inform our knowledge of planet formation and migration. These data now allow us to start inferring the relative importance of various...

POLARBEAR is a millimeter wave polarimeter operating from 5,200 meters in the Atacama Desert of northern Chile. The instrument's 3.5 arcminute beam enables measurements of the polarized cosmic microwave background (CMB) lensing signal. After briefly...

Binary black hole mergers in the presence of gaseous accretion flows are prime candidates for simultaneous observations of both gravitational waves and electromagnetic signals. I will present the results of 2D hydrodynamical simulations of...