Astrophysics

Weak gravitational lensing imprints a coherent distortion onto the observed shapes of distant galaxies. At the image level, this gravitational shear is degenerate with the intrinsic shape of galaxies, and the weak lensing signal-to-noise from an...

The death of massive stars in extraordinary explosions known as core collapse supernovae is directly or indirectly responsible for the origin of the lion’s share of the elements in the periodic table. Nearly sixty years of effort have been devoted...

The Bahcall Lunch follows the astrophysics colloquium lecture. 

The centers of massive galaxies are special in many ways, not least because apparently all of them host supermassive black holes. Since the discovery of a number of relations linking the mass of this central black hole to the large scale properties...

Abstract: This talk will concern the interaction problem in General Relativity in a specific setting. More precisely, we will describe a research program aimed at a rigorous understanding of the interaction of gravitational waves originating from...

Each week, we hold a relatively informal seminar/discussion series with an emphasis on extra-galactic and large-scale structure astrophysics.

During Galread a leader/visitor presents a recent paper to the discussion group. The PDF of the paper is...

The astronomer Carl Sagan once said “We are made of stardust.” What exactly did he mean? And how, in fact, did we come to be in the Universe? Today, we will take a journey from the Big Bang to the present to answer these questions. Of course, many...