Modelling the black hole silhouette in Sgr A* with ion tori

Details Modelling the black hole silhouette in Sgr A* with ion tori Modelling the black hole silhouette in Sgr A* with ion tori

2012-03-12

arxiv.org/abs/1203.2618v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

11 pages, 10 figures, submitted to A & A

Scientific paper

We calculate the "observed at infinity" image and spectrum of the accretion structure in Sgr A*, by modelling it as an optically thin, constant angular momentum ion torus in hydrodynamic equilibrium. The physics we consider includes a two-temperature plasma, a toroidal magnetic field, as well as radiative cooling by bremsstrahlung, synchrotron and inverse Compton processes. Our relativistic model has the virtue of being fully analytic and very simple, depending only on eight tunable parameters: the black hole spin and the inclination of the spin axis to our line of sight, the torus angular momentum, the polytropic index, the magnetic to total pressure ratio, the central values of density and electron temperature and the ratio of electron to ion temperatures. The observed image and spectrum are calculated numerically using the ray-tracing code GYOTO. Our results demonstrate that the ion torus model is able to account for the main features of the accretion structure surrounding Sgr A*.

Affiliated with

Also associated with

No associations

Rating

Modelling the black hole silhouette in Sgr A* with ion tori 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 Modelling the black hole silhouette in Sgr A* with ion tori, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling the black hole silhouette in Sgr A* with ion tori will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-142111