Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case

Details Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924703g&link_type=abstract

American Astronomical Society, AAS Meeting #219, #247.03

Physics

Scientific paper

Modeling the radiation generated by accreting matter is an important step towards realistic simulations of black hole accretion disks, especially at high accretion rates. To this end, we have recently added radiation transport to the existing general relativistic magnetohydrodynamic code, Cosmos++. However, before attempting to model radiative accretion disks, we have tested the new code using a series of shock tube and Bondi (spherical inflow) problems. The four radiative shock tube tests, first presented by Farris et al. (2008), have known analytic solutions, allowing us to calculate errors and convergence rates for our code. The Bondi problem only has an analytic solution when radiative processes are ignored, but is interesting because it is closer to the physics we are ultimately interested in. In our simulations, we include Thomson scattering and thermal bremsstrahlung in the opacity, focusing mostly on the super-Eddington regime. Unlike accretion onto bodies with solid surfaces, super-Eddington accretion onto black holes does not produce super-Eddington luminosity. In our examples, despite accreting at up to one hundred times the Eddington rate, our measured luminosity is always several orders of magnitude below Eddington.

Affiliated with

Also associated with

No associations

Rating

Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical Simulations of Optically Thick Accretion onto a Black Hole - Spherical Case will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1579542