Astrophysics Seminars

Jan
05
2012

Institute for Advanced Study Informal Astrophysics Seminar

Magnetorotational-Instability-Driven Accretion in Protoplanetary Disks
Xuening Bai
11:00am|Bloomberg Hall, Astrophysics Library
ABSTRACT: Magnetohydrodynamic (MHD) turbulence driven by the magnetorotational instability (MRI) has long been considered as the most promising mechanism for transporting angular momentum in accretion disks. In protoplanetary disks (PPDs), however...
Dec
01
2011

Institute for Advanced Study Informal Astrophysics Seminar - ADDED

Roche Accretion Of Stars Close To Massive Black Holes
Lixin (Jane) Dai
11:00am|Bloomberg Hall Astrophysics Library
ABSTRACT: We consider the Roche accretion in an Extreme Mass-Ratio Inspiral (EMRI) binary system formed by a star orbiting a massive black hole. The ultimate goal is to constrain the mass and spin of the black hole and confirm general relativity...
Nov
22
2011

Institute for Advanced Study Astrophysics Seminar

Galactic-Scale Star Formation Rates: An Efficient Market
Eve Ostriker
11:00am|Bloomberg Hall Astrophysics Library
ABSTRACT: Recent surveys have established increasingly precise correlations between star formation rates (SFRs) and the gas, stellar, and dark matter contents of galaxies. Outer galactic disks are dominated by atomic gas and have steep Kennicutt...
Nov
10
2011

Institute for Advanced Study Informal Astrophysics Seminar

A Physical Mechanism for Deflagration-to-Detonation Transitions (DDTs)
11:00am|Bloomberg Hall Astrophysics Library
ABSTRACT: DDTs are observed in terrestrial combustion flows, and are inferred to occur in supernova explosions of type Ia. The physical mechanism responsible for DDT, in both chemical and nuclear combustion, is a long standing open question. We...