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
    de Vries, CP
    den Herder, JW
    Kaastra, JS
    Paerels, FB
    den Boggende, AJ
    Rasmussen, AP
    [J]. ASTRONOMY & ASTROPHYSICS, 2003, 404 (03): : 959 - 967
  • [3] Chandra detection of O VIII Lyα absorption from an overdense region in the intergalactic medium
    Fang, TT
    Marshall, HL
    Lee, JC
    Davis, DS
    Canizares, CR
    [J]. ASTROPHYSICAL JOURNAL, 2002, 572 (02) : L127 - L130
  • [4] On the physical origin of OVI absorption-line systems
    Heckman, TM
    Norman, CA
    Strickland, DK
    Sembach, KR
    [J]. ASTROPHYSICAL JOURNAL, 2002, 577 (02) : 691 - 700
  • [5] The X-ray forest:: A new prediction of hierarchical structure formation models
    Hellsten, U
    Gnedin, NY
    Miralda-Escudé, J
    [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
    LOCKMAN, FJ
    SAVAGE, BD
    [J]. 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
    McLaughlin, BM
    Kirby, KP
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1998, 31 (22) : 4991 - 5002
  • [10] INTERSTELLAR PHOTOELECTRIC ABSORPTION CROSS-SECTIONS, 0.03-10 KEV
    MORRISON, R
    MCCAMMON, D
    [J]. ASTROPHYSICAL JOURNAL, 1983, 270 (01) : 119 - 122
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