XMM-Newton observations of absorption features towards PKS 2155-304

被引：3
作者：
Cagnoni, I
Nicastro, F
Maraschi, L
Treves, A
Tavecchio, F
机构：
[1] Univ Insubria, Dip Sci, I-22100 Como, Italy
[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[3] Osserv Astron Brera, I-20121 Milan, Italy
来源：
NEW ASTRONOMY REVIEWS | 2003年 / 47卷 / 6-7期
关键词：
BL lacertae objects; individual (PKS 2155-304); intergalactic medium; large-scale structure of universe; quasars; absorption lines;
D O I：
10.1016/S1387-6473(03)00093-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present XMM-Newton grating spectra of the bright BL Lac object PKS 2155 - 304 taken in November 2000. Various absorption features are detected in the range 5-38 A. The results are compared with those recently obtained with Chandra gratings [ApJ 573 (2002) 157; Nature, 421 (2003) 719]. We discuss whether the absorption occurs at the source (in the host galaxy or in a jet), in the Galactic halo, or in the intervening cluster. We are not able to confirm the proposal by [ApJL 572 (2002) L127] that a hot medium is responsible for an absorption feature at an intermediate redshift. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：561 / 563
页数：3
相关论文
共 17 条
[1]  
CAGNONI I, 2003, UNPUB
[2]   The interstellar oxygen-K absorption edge as observed by XMM-Newton - Separation of instrumental and interstellar components [J].
de Vries, CP ;
den Herder, JW ;
Kaastra, JS ;
Paerels, FB ;
den Boggende, AJ ;
Rasmussen, AP .
ASTRONOMY & ASTROPHYSICS, 2003, 404 (03) :959-967
[3]   Chandra detection of O VIII Lyα absorption from an overdense region in the intergalactic medium [J].
Fang, TT ;
Marshall, HL ;
Lee, JC ;
Davis, DS ;
Canizares, CR .
ASTROPHYSICAL JOURNAL, 2002, 572 (02) :L127-L130
[4]   On the physical origin of OVI absorption-line systems [J].
Heckman, TM ;
Norman, CA ;
Strickland, DK ;
Sembach, KR .
ASTROPHYSICAL JOURNAL, 2002, 577 (02) :691-700
[5]   The X-ray forest:: A new prediction of hierarchical structure formation models [J].
Hellsten, U ;
Gnedin, NY ;
Miralda-Escudé, J .
ASTROPHYSICAL JOURNAL, 1998, 509 (01) :56-61
[6]  
Kashyap V., 2000, BASI, V28, P475
[7]   THE HUBBLE-SPACE-TELESCOPE QUASAR ABSORPTION-LINE KEY PROJECT .10. GALACTIC H-I-21-CENTIMETER EMISSION TOWARD 143 QUASARS AND ACTIVE GALACTIC NUCLEI [J].
LOCKMAN, FJ ;
SAVAGE, BD .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1995, 97 (01) :1-47
[8]  
MARASCHI L, 2003, P S NEW VIS XRAY UN
[9]   Photoabsorption of atomic oxygen in the vicinity of the K-edge [J].
McLaughlin, BM ;
Kirby, KP .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (22) :4991-5002
[10]   INTERSTELLAR PHOTOELECTRIC ABSORPTION CROSS-SECTIONS, 0.03-10 KEV [J].
MORRISON, R ;
MCCAMMON, D .
ASTROPHYSICAL JOURNAL, 1983, 270 (01) :119-122
12