Astrophysics Seminars

In dilute plasmas, the electron mean free path is significantly larger than the electron Larmor radius. As a result, heat is transported primarily along (not across) magnetic field lines. The physics of buoyancy instabilities ("convection") is...

Galaxy cluster merger statistics are an important component in understanding the formation of large-scale structure. Recent studies suggest a merger bias, that mergers are more highly clustered than other objects of their mass. Cluster mergers are...

I will summarize our understanding of the climate of Titan based on observations, theory, and modeling. The nature of observed phenomena, such as summer-hemisphere methane clouds, the vertical profile of methane in the lower atmosphere, high...

The OWLS project aims to study the formation of galaxies and the evolution of the intergalactic medium using a large suite of cosmological gas-dynamical simulations. The simulations are repeated many times using different physical and numerical...

Hypervelocity stars leaving the Galaxy at ~1000 km/s are a natural consequence of a massive black hole in a dense stellar environment. In 2005 we discovered the first such hypervelocity star (HVS): a 3 solar mass B star, similar to stars seen in...

I will discuss recent hydrodynamic and emission models for the shock transition zone in Balmer-dominated SNRs. I will emphasize the role of atomic interactions in producing distinct populations of hot neutral hydrogen atoms, which emit the observed...

I will present various results based upon a synergistic methodology whose primary objective encompasses probing discrete gamma-ray burst (GRB) high-energy particle astrophysics via a broad-band, multi-messenger paradigm. The interface between...