A view of PKS 2155-304 with XMM-Newton reflection grating spectrometers

被引：20

作者：

Cagnoni, I

Nicastro, F

Maraschi, L

Treves, A

Tavecchio, F

机构：

[1] Univ Insubria, Dipartimento Sci, I-22100 Como, Italy

[2] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[3] Osserv Astron Brera, I-20121 Milan, Italy

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 603卷 / 02期

关键词：

BL Lacertae objects : individual (PKS 2155-304); intergalactic medium; large-scale structure of universe; quasars : absorption lines; X-rays : galaxies;

D O I：

10.1086/381698

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the high-resolution X-ray spectrum of the BL Lac object PKS 2155-304 taken with the RGS units on board XMM-Newton in 2000 November. We detect an O VII Kalpha resonant absorption line from warm/hot local gas at 21.59 Angstrom (similar to4.5 sigma detection). The line profile is possibly double peaked. We do not confirm the strong 20.02 Angstrom absorption line seen with Chandra and interpreted as z similar to 0.05 O VIII Kalpha. We set a 3 sigma upper limit of 14 mAngstrom on the equivalent width. We also detect the similar to23.5 Angstrom interstellar O I 1s --> 2p line and derive a factor of less than or equal to1.5 subsolar O/H ratio in the interstellar medium along the PKS 2155-304 line of sight.

引用

页码：449 / 455

页数：7

共 43 条

[1] X-RAY CONSTRAINTS ON THE INTERGALACTIC MEDIUM [J].

ALDCROFT, T ;

ELVIS, M ;

MCDOWELL, J ;

FIORE, F .

ASTROPHYSICAL JOURNAL, 1994, 437 (02) :584-596

[2] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].

ANDERS, E ;

GREVESSE, N .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (01) :197-214

[3] The deuterium abundance toward Q1937-1009 [J].

Burles, S ;

Tytler, D .

ASTROPHYSICAL JOURNAL, 1998, 499 (02) :699-712

[4]

CAGNONI I, 2002, UNPUB APJL

[5] Baryons in the warm-hot intergalactic medium [J].

Davé, R ;

Cen, R ;

Ostriker, JP ;

Bryan, GL ;

Hernquist, L ;

Katz, N ;

Weinberg, DH ;

Norman, ML ;

O'Shea, B .

ASTROPHYSICAL JOURNAL, 2001, 552 (02) :473-483

[6] 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

[7] The reflection grating spectrometer on board XMM-Newton [J].

den Herder, JW ;

Brinkman, AC ;

Kahn, SM ;

Branduardi-Raymont, G ;

Thomsen, K ;

Aarts, H ;

Audard, M ;

Bixler, JV ;

den Boggende, AJ ;

Cottam, J ;

Decker, T ;

Dubbeldam, L ;

Erd, C ;

Goulooze, H ;

Güdel, M ;

Guttridge, P ;

Hailey, CJ ;

Al Janabi, K ;

Kaastra, JS ;

de Korte, PAJ ;

van Leeuwen, BJ ;

Mauche, C ;

McCalden, AJ ;

Mewe, R ;

Naber, A ;

Paerels, FB ;

Peterson, JR ;

Rasmussen, AP ;

Rees, K ;

Sakelliou, I ;

Sako, M ;

Spodek, J ;

Stern, M ;

Tamura, T ;

Tandy, J ;

de Vries, CP ;

Welch, S ;

Zehnder, A .

ASTRONOMY & ASTROPHYSICS, 2001, 365 (01) :L7-L17

[8]

DENHERDER JW, 2002, RGSSRONRPCAL01006

[9] THE ENVIRONMENT OF THE BL LACERTAE OBJECT PKS 2155-304 [J].

FALOMO, R ;

PESCE, JE ;

TREVES, A .

ASTROPHYSICAL JOURNAL, 1993, 411 (02) :L63-L66

[10] Probing cosmology with the X-ray forest [J].

Fang, TT ;

Canizares, CR .

ASTROPHYSICAL JOURNAL, 2000, 539 (02) :532-539

← 1 2 3 4 5 →