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

Publications of the Astronomical Society of Australia

Jason Cullen¹ 

关键词: black hole physics;    X-rays: stars;    plasmas;    gamma-rays: theory;    radiative transfer;    accretion;   

DOI  :  10.1071/AS00048

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

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.

【 授权许可】

Unknown