Astrophysics Seminars

I examine the accretion disks which power outbursts in two types of white dwarf binary systems: dwarf novae (DNe) and AM CVns. Accretion disks in these systems are thermally unstable, causing some of the observed variations. The source of "normal...

In this talk, I will discuss several analytic methods for chaotic gravitational dynamics, applied to dense stellar systems. I begin with a statistical mechanics approach to the chaotic four-body problem, which yields distribution functions for the...

NOTE SPECIAL DAY OF WEEK - Protoplanetary disks of gas and dust around young stars are the birth cradles of planets. The study of these disks was for a long time based on unresolved observations, limiting our understanding of planet formation. Of...

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...