Jason Cullen, PASA, 17 (1), 48.
Next Section: Introduction
Comptonization and Time-lags in Multi-Temperature Plasmas Surrounding Compact Objects
Jason Cullen 1,2
1 Special Research Centre for Theoretical Astrophysics, School of Physics,
University of Sydney, Sydney, NSW 2006
cullen@physics.usyd.edu.au
2 Sir Frank Packer Department of Theoretical Physics, School of Physics,
University of Sydney, Sydney, NSW 2006
Abstract:
This paper investigates a recent model proposed by Moskalenko, Collmar and SchÓÆnfelder (1998) for the plasma surrounding galactic black hole candidates. Using a linear Monte Carlo code, the spectral and temporal behavior 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 physics Òš--Òš X-rays: stars Òš--Òš plasmas Òš--Òš gamma-rays: theory Òš--Òš radiative transfer Òš--Òš accretion
- Introduction
- Algorithm of the MONTE CARLO Simulation
- Spectra
- Time-lags
- Conclusion
- Acknowledgements
- References
Ò? Copyright Astronomical Society of Australia 1997