The BeppoSAX X-ray view of reflection-dominated Seyfert galaxies

被引:1
作者
Guainazzi, M
Matt, G
Fiore, F
机构
[1] ESTEC SA, ESA, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, Netherlands
[2] Univ Roma Tre, Dipartimento Fis E Amaldi, I-00146 Rome, Italy
[3] Osserv Astron Roma, I-00144 Monte Porzio Catone, Italy
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)00844-3
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
We present new results from BeppoSAX observations of reflection-dominated Seyfert galaxies, and namely: 1) the Compton-thick Seyfert 2 NGC 1068 and Circinus Galaxy; 2) the Seyfert 1 NGC 4051, whose nucleus was observed on May 1998 to have switched off, leaving only a residual reflection component as an echo of its past activity. Our main focus in this paper is on the soft X-ray continuum properties and on the X-ray line spectroscopy. (C) 2000 COSPAR. Published by Elsevier Science Ltd.
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收藏
页码:803 / 808
页数:6
相关论文
共 34 条
[1]   UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].
ANTONUCCI, R .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 :473-521
[2]   SPECTROPOLARIMETRY AND THE NATURE OF NGC-1068 [J].
ANTONUCCI, RRJ ;
MILLER, JS .
ASTROPHYSICAL JOURNAL, 1985, 297 (02) :621-632
[3]  
AWAKI H, 1991, PUBL ASTRON SOC JPN, V43, P195
[4]   BeppoSAX, the wide band mission for X-ray astronomy [J].
Boella, G ;
Butler, RC ;
Perola, GC ;
Piro, L ;
Scarsi, L ;
Bleeker, JAM .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :299-307
[5]   X-RAY-PROPERTIES OF BRIGHT FAR-INFRARED GALAXIES [J].
DAVID, LP ;
JONES, C ;
FORMAN, W .
ASTROPHYSICAL JOURNAL, 1992, 388 (01) :82-92
[6]  
FABBIANO G, 1989, ANNU REV ASTRON ASTR, V27, P87
[7]   ASCA observations of Seyfert 1 galaxies. III. The evidence for absorption and emission due to photoionized gas [J].
George, IM ;
Turner, TJ ;
Netzer, H ;
Nandra, K ;
Mushotzky, RF ;
Yaqoob, T .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1998, 114 (01) :73-120
[8]   Thick tori around active galactic nuclei: The case for extended tori and consequences for their X-ray and infrared emission [J].
Granato, GL ;
Danese, L ;
Franceschini, A .
ASTROPHYSICAL JOURNAL, 1997, 486 (01) :147-159
[9]   VLBI imaging of water maser emission from the nuclear torus of NGC 1068 [J].
Greenhill, LJ ;
Gwinn, CR ;
Antonucci, R ;
Barvainis, R .
ASTROPHYSICAL JOURNAL, 1996, 472 (01) :L21-&
[10]   A swan song: the disappearance of the nucleus of NGC 4051 and the echo of its past glory [J].
Guainazzi, M ;
Nicastro, F ;
Fiore, F ;
Matt, G ;
McHardy, I ;
Orr, A ;
Barr, P ;
Fruscione, A ;
Papadakis, I ;
Parmar, AN ;
Uttley, P ;
Perola, GC ;
Piro, L .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 301 (01) :L1-L4