Iron K emission line time-lags in MCG-6-30-15

被引：7

作者：

Negoro, H ^{[1
]}

Matsuoka, M

Mihara, T

Otani, C

Wang, TG

Awaki, H

机构：

[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[2] Univ Sci & Technol China, Ctr Astrophys, Hefei, Anhui, Peoples R China

[3] Kyoto Univ, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan

来源：

BROAD BAND X-RAY SPECTRA OF COSMIC SOURCES | 2000年 / 25卷 / 3-4期

关键词：

D O I：

10.1016/S0273-1177(99)00783-8

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We investigate spectral variations dependent on short timescale variations in the Seyfert galaxy MCG -6-30-15 using data obtained with ASCA in 1994. Spectral hardening of the continuum spectrum during a large flare lasting for similar to 5 x 10(4) sec was observed. Such spectral hardening is commonly observed in stellar black hole candidates. This and other similarities in X-rays between these objects suggest their time variations have the same origin. We have also found that the narrow iron K alpha line is more prominent in the decay phase of the flare than in the rise phase. This implies time lags of the narrow iron-line component behind the continuum component, which indicate that the narrow iron K alpha line is present in the outer region (similar to 1000 r(s)) of the accretion disk. (C) 2000 COSPAR. Published by Elsevier Science Ltd.

引用

页码：481 / 484

页数：4

共 17 条

[1]

BAO G, 1992, ASTRON ASTROPHYS, V257, P594

[2] UNIFIED DESCRIPTION OF ACCRETION FLOWS AROUND BLACK-HOLES [J].

CHEN, XM ;

ABRAMOWICZ, MA ;

LASOTA, JP ;

NARAYAN, R ;

YI, I .

ASTROPHYSICAL JOURNAL, 1995, 443 (02) :L61-L64

[3] ASCA observations of the iron line structure in Cygnus X-1 [J].

Ebisawa, K ;

Ueda, Y ;

Inoue, H ;

Tanaka, Y ;

White, NE .

ASTROPHYSICAL JOURNAL, 1996, 467 (01) :419-434

[4] Central black hole masses in active galactic nuclei inferred from X-ray variability [J].

Hayashida, K ;

Miyamoto, S ;

Kitamoto, S ;

Negoro, H ;

Inoue, H .

ASTROPHYSICAL JOURNAL, 1998, 500 (02) :642-659

[5]

INOUE H, 1989, ESA SP PUBL, V296, P783

[6] The variable iron K emission line in MCG-6-30-15 [J].

Iwasawa, K ;

Fabian, AC ;

Reynolds, CS ;

Nandra, K ;

Otani, C ;

Inoue, H ;

Hayashida, G ;

Brandt, WN ;

Dotani, T ;

Kunieda, H ;

Matsuoka, M ;

Tanaka, Y .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 282 (03) :1038-1048

[7]

LEIGHLY C, 1998, UNPUB

[8] X-ray fluctuations from locally unstable advection-dominated disks [J].

Manmoto, T ;

Takeuchi, M ;

Mineshige, S ;

Matsumoto, R ;

Negoro, H .

ASTROPHYSICAL JOURNAL, 1996, 464 (02) :L135-L138

[9]

MATSUMOTO C, UNPUB

[10] X-RAY SPECTRAL VARIABILITY AND COMPLEX ABSORPTION IN THE SEYFERT-1 GALAXIES NGC-4051 AND MCG-6-30-15 [J].

MATSUOKA, M ;

PIRO, L ;

YAMAUCHI, M ;

MURAKAMI, T .

ASTROPHYSICAL JOURNAL, 1990, 361 (02) :440-458

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