Variation of the broad X-ray iron line in MCG-6-30-15 during a flare

被引:57
作者
Iwasawa, K
Fabian, AC
Young, AJ
Inoue, H
Matsumoto, C
机构
[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[2] Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan
关键词
galaxies : individual : MCG-6-30-15; galaxies : Seyfert; X-rays : galaxies;
D O I
10.1046/j.1365-8711.1999.02671.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report results on the broad iron emission line of the Seyfert galaxy MCG-6-30-15, obtained from the second long ASCA observation in 1997. The time-averaged profile of the broad line is very similar to that seen with ASCA in 1994, so confirming the detailed model fit then obtained. A bright flare is seen in the light curve, during which the continuum was soft. At that time the emission line peaks around 5 keV and most of its emission is shifted below 6 keV with no component detected at 6.4 keV (EW < 60 eV), This can be interpreted as the result of an extraordinarily large gravitational redshift owing to a dominant flare occurring very close to the black hole at a radius of less than or similar to 5r(g).
引用
收藏
页码:L19 / L24
页数:6
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