X-RAY CONTINUUM AND IRON-K EMISSION-LINE FROM THE RADIO GALAXY 3C 390.3

被引：23

作者：

INDA, M

MAKISHIMA, K

KOHMURA, Y

TASHIRO, M

OHASHI, T

BARR, P

HAYASHIDA, K

PALUMBO, GGC

TRINCHIERI, G

ELVIS, M

FABBIANO, G

机构：

[1] TOKYO METROPOLITAN UNIV,DEPT PHYS,HACHIOJI,TOKYO 19203,JAPAN

[2] EXOSAT OBSERV,ESTEC,DEPT SPACE SCI,DIV ASTROPHYS,2200 AG NOORDWIJK,NETHERLANDS

[3] OSAKA UNIV,DEPT EARTH & SPACE SCI,TOYONAKA,OSAKA 560,JAPAN

[4] UNIV BOLOGNA,DIPARTIMENTO ASTRON,I-40126 BOLOGNA,ITALY

[5] OSSERVATORIO ASTROFISICO ARCETRI,I-50125 FLORENCE,ITALY

[6] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

ASTROPHYSICAL JOURNAL | 1994年 / 420卷 / 01期

关键词：

GALAXIES; INDIVIDUAL; (3C; 390.3); ACTIVE; X-RAYS;

D O I：

10.1086/173547

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

X-ray properties of the radio galaxy 3C 390.3 were investigated using the EXOSAT and Ginga satellites. Long-term, large-amplitude X-ray intensity changes were detected over a period extending from 1984 through 1991, and high-quality X-ray spectra were obtained especially with Ginga. The X-ray continuum spectra were described with power-law model with photon slope in the range 1.5-1.8, and the slope flattened as the 2-20 keV luminosity decreased by 40%. There was a first detection of the iron emission line from this source at the 90% confidence level. An upper limit was derived on the thermal X-ray component. X-ray emission mechanisms and possible origins of the long-term variation are discussed.

引用

页码：143 / 151

页数：9

共 57 条

[1]

ALEF W, 1988, ASTRON ASTROPHYS, V192, P53

[2] THE VARIABILITY OF 3C-390.3 [J].