Astrophysics Seminars

Seven years ago, while surveying the high-energy sky, the Large Area Telescope (LAT) on the Fermi satellite unexpectedly detected gamma-rays from a nova explosion. Four years later, after several more such detections, the Fermi/LAT team reported...

In this talk I will discuss the non-linear infrared effects that plagues Standard Perturbation Theory for Large Scale Structure. Understanding and resumming these contributions is essential to achieve a detailed description of the correlation...

Accurate cluster masses are a key component in deriving cosmological constraints from galaxy cluster abundance. Weak lensing (WL) provides a direct measure of the cluster mass, both baryonic and dark, regardless of the underlying nature of the mass...

Coalescing binary neutron stars are among the most promising sources for ground-based gravitational wave detectors such as advanced LIGO. Tidal interactions in such systems extract energy from the orbit and, at some level, modify the gravitational...

The ongoing search for intergalactic magnetic fields using blazar observations suggests field strength in the 10^(-14) to 10^{-17} G range on tens of Mpc length scales. Such fields can have important implications for the early universe and also...

Fluctuations in a stellar system's gravitational field cause the orbits of stars to evolve. These fluctuations can either originate from external perturbers (e.g. flybys), or from the intrinsic discreteness of the system (e.g. giant molecular clouds...