The unique rapid variabilities of the iron Kα line profiles in NGC 4151

被引：27
作者：
Wang, JX [1 ]
Wang, TG
Zhou, YY
机构：
[1] Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
[2] Chinese Acad Sci, Natl Astron Observ, Beijing 100080, Peoples R China
[3] Beijing Astrophys Ctr, Beijing 100080, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2001年 / 549卷 / 02期
关键词：
black hole physics; galaxies : active; galaxies : individual (NGC 4151); line : profiles; X-rays : galaxies;
D O I：
10.1086/319471
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a detailed analysis of iron K alpha line variabilities in NGC 4151 using long ASCA observation data obtained in 1995 May. Despite the relatively small amplitude variations in the continuum flux, the iron K alpha line flux and profile show dramatic variations. Particularly, the line profile changes from a single peak to what appears to be double peaks and back in timescales of a few times 10(4) s. The apparently double-peaked profiles can be well interpreted as line emission from a Keplerian ring around a massive black hole. An absorption line at around 5.9 keV is also marginally detected. We discuss current Fe K line models, but none of them can well explain the observed line and continuum variations.
引用
收藏
页码：891 / 895
页数：5
相关论文
共 23 条
[1]  
FABIAN AC, 1995, MON NOT R ASTRON SOC, V277, pL11
[2]   Broad iron lines in active Galactic nuclei [J].
Fabian, AC ;
Iwasawa, K ;
Reynolds, CS ;
Young, AJ .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2000, 112 (775) :1145-1161
[3]   X-RAY-FLUORESCENCE FROM THE INNER DISK IN CYGNUS X-1 [J].
FABIAN, AC ;
REES, MJ ;
STELLA, L ;
WHITE, NE .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1989, 238 (02) :729-736
[4]  
FABIAN AC, 1997, XRAY IMAGING SPECTRO, P201
[5]   DETECTION OF X-RAYS FROM SEYFERT GALAXIES NGC-1275 AND NGC-4151 BY UHURU SATELLITE [J].
GURSKY, H ;
KELLOGG, EM ;
LEONG, C ;
TANANBAUM, H ;
GIACCONI, R .
ASTROPHYSICAL JOURNAL, 1971, 165 (02) :L43-+
[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]   Variation of the broad X-ray iron line in MCG-6-30-15 during a flare [J].
Iwasawa, K ;
Fabian, AC ;
Young, AJ ;
Inoue, H ;
Matsumoto, C .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 306 (01) :L19-L24
[8]   LINE-PROFILES FROM A DISK AROUND A ROTATING BLACK-HOLE [J].
LAOR, A .
ASTROPHYSICAL JOURNAL, 1991, 376 (01) :90-94
[9]   REPEATED X-RAY FLARING IN NGC-4151 [J].
LAWRENCE, A .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1980, 192 (01) :83-94
[10]  
LEIGHLY KM, 1997, XRAY IMAGING SPECTRO, P291
123