Simulating the Emission and Outflows from Accretion Disks

Details Simulating the Emission and Outflows from Accretion Disks Simulating the Emission and Outflows from Accretion Disks

2007-01-26

arxiv.org/abs/astro-ph/0701778v1

Class.Quant.Grav.24:S259-S274,2007

Astronomy and Astrophysics

Astrophysics

17 pages, 6 color Postscript figures, uses IOP style files, to be published in the special issue of Classical and Quantum Grav

Scientific paper

10.1088/0264-9381/24/12/S17

The radio source Sagittarius A* (Sgr A*) is believed to be a hot, inhomogeneous, magnetized plasma flowing near the event horizon of the 3 million solar mass black hole at the galactic center. At a distance of 8000 parsecs the black hole would be among the largest black holes as judged by angular size. Recent observations are consistent with the idea that the millimeter and sub-millimeter photons are dominated by optically thin, thermal synchrotron emission. Anticipating future Very Long Baseline Interferometry (VLBI) observations of Sgr A* at these wavelengths, we present here the first dynamically self-consistent models of millimeter and sub-millimeter emission from Sgr A* based on general relativistic numerical simulations of the accretion flow. Angle-dependent spectra are calculated assuming a thermal distribution of electrons at the baryonic temperature dictated by the simulation and the accretion rate, which acts as a free parameter in our model. The effects of varying model parameters (black hole spin and inclination of the spin to the line of sight) and source variability on the spectrum are shown. We find that the accretion rate value needed to match our calculated millimeter flux to the observed flux is consistent with constraints on the accretion rate inferred from detections of the rotation measure. We also describe the relativistic jet that is launched along the black hole spin axis by the accretion disk and evolves to scales of 1000 gravitational radii.

Affiliated with

Also associated with

No associations

Rating

Simulating the Emission and Outflows from Accretion Disks 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 Simulating the Emission and Outflows from Accretion Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulating the Emission and Outflows from Accretion Disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-567986