Comptonisation and Time-lags in Multi-temperature Plasmas Surrounding Compact Objects
Abstract
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.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- April 2000
- DOI:
- 10.1071/AS00048
- Bibcode:
- 2000PASA...17...48C
- Keywords:
-
- BLACK HOLES;
- X-RAYS;
- GAMMA-RAYS;
- ACCRETION;
- black hole physics;
- X-rays: stars;
- plasmas;
- gamma-rays: theory;
- radiative transfer;
- accretion