Discovery of hard X-ray delays in the X-ray emission of the Seyfert 1 galaxy Markarian 110: Possible evidence of comptonization

被引：19

作者：

Dasgupta, Surajit ^{[1
]}

Rao, A. R. ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 651卷 / 01期

基金：

美国国家航空航天局;

关键词：

accretion; accretion disks; galaxies : active; galaxies : individual (Markarian 110); radiation mechanisms : general; Xrays : galaxies;

D O I：

10.1086/509117

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of hard X-ray delays in the X-ray emission of the Seyfert 1 galaxy Mrk 110, based on a long XMM-Newton observation. Cross-correlation between the X-ray light curves of different energy bands reveals an energy-dependent delay ranging from a few minutes to an hour. We find that the energy spectrum can be modeled by Comptonization of disk blackbody photons. The energy-dependent delay can be modeled as due to the effect of Comptonization in a hot plasma confined within 10 Schwarzschild radii of the black hole. We discuss our results in the context of inverse Comptonization of the soft photons by highly energetic plasma.

引用

页码：L13 / L16

页数：4

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