Research

Theory Group

Cosmology

Cosmic Reionization

Early Universe

First Stars & Galaxies

Fundamental Physics

Structure Formation

Extragalactic Astrophysics

Clusters of Galaxies

Theoretical & Computational Astrophysics

Galactic Evolution

ISM and Star Formation

Milky Way Evolution

Planetary Sciences

Astrobiology

Planet Formation

Stellar Astrophysics

Asteroseismology

Gamma-ray Bursts

Neutron Stars & Magnetars

Supernovae

White Dwarfs

Theory Group : Stellar Astrophysics : Gamma-ray Bursts

Patrick Crumley, Pawan Kumar, Milos Milosavljevic, Rodolfo Santana


ADS | astro-ph

Pawan Kumar  

Professor

website

Research Interests

Gamma-ray bursts; helioseismology; binary stars; tidal interaction; accretion disks; cosmology.

Group Areas

Theory, Asteroseismology, Gamma-ray Bursts


ADS | astro-ph

Milos Milosavljevic  

Associate Professor

website

Research Interests

Massive black holes; the Galactic center; galaxy formation; galaxy clusters; plasma astrophysics.

Group Areas

Theory, Gamma-ray Bursts, Clusters of Galaxies, Theoretical & Computational Astrophysics, Black Holes & AGN


ADS | astro-ph

Patrick Crumley  

Graduate Student

Group Areas

Theory, Gamma-ray Bursts


ADS | astro-ph

Rodolfo Santana  

Graduate Student

Group Areas

Theory, Gamma-ray Bursts

The formation of a thick accretion disk around the black hole at the center of a collapsing star. A parcel of gas which has a circular orbit about the axis of rotation of the star at a radius r before core collapse (red dashed line), goes into free-fall after core collapse (solid red line), colliding with its counterpart from the opposite side of the equatorial plane (blue dashed and solid lines) at a distance req and forming a disk in the equatorial (x-y) plane (light gray). After the parcels of gas collide, they fall further toward the black hole (black) until their angular momentum allows them to become centrifugally supported in an accretion disk (dark gray). The set of axes is shown for orientation; in our calculations, the origin of this coordinate system is at the center of the star.

from

Mass Fall-back and Accretion in the Central Engine of Gamma-Ray Bursts astro-ph