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Comptonisation and Time-lags in Multi-temperature Plasmas Surrounding Compact Objects

Published online by Cambridge University Press:  05 March 2013

Jason Cullen
Jason Cullen*
Affiliation:
Special Research Centre for Theoretical Astrophysics, School of Physics, University of Sydney, Sydney, NSW 2006, Australia; [email protected] Sir Frank Packer Department of Theoretical Physics, School of Physics, University of Sydney, Sydney, NSW 2006, Australia
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Abstract

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This paper investigates a recent model proposed by Moskalenko, Collmar & Schönfelder (1998) for the plasma surrounding galactic black hole candidates. Using a linear Monte Carlo code, the spectral and temporal behaviour of the model is found for the case where the plasma geometry consists of a hot shell surrounding a cooler spherical core. The spectrum produced by this model at X-ray and gamma-ray energies is obtained numerically. Also found for the first time in this geometry are the photon time-lags between two energy bands due to rapid aperiodic variability. It is argued that the time-lag information may be able to determine whether this particular geometry is a realistic model for the material surrounding galactic black hole candidates.

Keywords

black hole physicsX-rays: starsplasmasgamma-rays: theoryradiative transferaccretion
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 17 , Issue 1 , 2000 , pp. 48 - 55
Copyright
Copyright © Astronomical Society of Australia 2000

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