报告人：Cosimo Bambi 教授(复旦大学)

时间：2016年3月29日下午4：00

地点：东区理化大楼18层天文台报告厅

报告摘要：The X-ray reflection component of a thin accretion disk around a black hole can be conveniently calculated with the approach of the transfer function. The advantage of this method is that the problem is split in two blocks: one is the calculation of the transfer function, which takes into account all the relativistic effects (Doppler boosting, gravitational redshift, light bending) and only depends on the background metric, and the other part is the calculation of the spectrum at the emission point, which is only determined by the microphysics and requires to solve radiative transfer equations. In this talk, I will discuss the calculations of the transfer function. In the Kerr metric, one has to solve some elliptic integrals. In the more general case, one has to solve the geodesic equations and then use some interpolation techniques.