A reflection-dominated X-ray spectrum discovered by ASCA in the Circinus galaxy

被引：71

作者：

Matt, G

Fiore, F

Perola, GC

Piro, L

Fink, HH

Grandi, P

Matsuoka, M

Oliva, E

Salvati, M

机构：

[1] CNR, IAS, I-00044 FRASCATI, ITALY

[2] OSSERV ASTRON ROMA, I-00044 MONTEPORZIO CATON, ITALY

[3] SAX SCI DATA CTR, I-00131 ROME, ITALY

[4] MAX PLANCK INST EXTRATERR PHYS, D-37075 GARCHING, GERMANY

[5] RIKEN, INST PHYS & CHEM RES, WAKO, SAITAMA 35101, JAPAN

[6] OSSERV ASTROFIS ARCETRI, I-52015 FLORENCE, ITALY

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1996年 / 281卷 / 04期

关键词：

line; formation; identification; galaxies; individual; Circinus; Seyfert; X-rays;

D O I：

10.1093/mnras/281.4.L69

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first pointed X-ray observation, made by ASCA, of the nearby Seyfert 2 galaxy in Circinus. The spectrum consists of a very prominent (EW similar to 2 keV) fluorescent 6.4-keV iron line, a very flat continuum (photon spectral index less than 1) and other lines, including one at similar to 7 keV that is probably due, at least in part, to iron K beta fluorescent emission. The spectrum is consistent with Compton scattering and fluorescent emission from cold matter illuminated by an obscured active nucleus.

引用

页码：L69 / L73

页数：5

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