Journal Article

Monte Carlo simulations of the broad-band spectra of Sagittarius A* through the use of general relativistic magnetohydrodynamics

Guy Hilburn, Edison Liang, Siming Liu and Hui Li

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 3, pages 1620-1627
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15787.x
Monte Carlo simulations of the broad-band spectra of Sagittarius A* through the use of general relativistic magnetohydrodynamics

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We present results of simulations of the spectrum of the accretion flow on to the supermassive black hole in our Galactic Centre, Sagittarius A*, generated with a coupling of Monte Carlo (MC) radiation and general relativistic magnetohydrodynamic codes. In our modelling, we use the two-dimensional harm grmhd code to first model the physical parameters of the disc, then feed its results into our two-dimensional MC photon transport code. We will discuss results obtained which fit radio, infrared and Chandra-obtained flaring or quiescent X-ray data points, as well as the validity of the amount of scaling of input parameters (density, temperature and magnetic field) required to fit these points. harm output will be used to suggest whether the scaling is within reasonable limits.

Keywords: accretion, accretion discs; MHD; Galaxy: centre

Journal Article.  5559 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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