The XMM-Newton and BeppoSAX view of the Ultra Luminous Infrared Galaxy MKN 231

被引：98

作者：

Braito, V ^{[1
]}

Della Ceca, R

Piconcelli, E

Severgnini, P

Bassani, L

Cappi, M

Franceschini, A

Iwasawa, K

Malaguti, G

Marziani, P

Palumbo, GGC

Persic, M

Risaliti, G

Salvati, M

机构：

[1] Osserv Astron Brera, INAF, Milan, Italy

[2] Univ Padua, Dipartimento Astron, I-35100 Padua, Italy

[3] CNR, IASF, I-40126 Bologna, Italy

[4] ESA, VILSPA, SOC, XMM, Madrid, Spain

[5] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[6] Osserv Astron Padova, INAF, I-35122 Padua, Italy

[7] Univ Bologna, Dipartimento Astron, I-40126 Bologna, Italy

[8] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy

[9] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[10] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 420卷 / 01期

关键词：

X-rays : galaxies; galaxies : individual : Markarian 231;

D O I：

10.1051/0004-6361:20040061

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss XMM-Newton and BeppoSAX observations of MKN 231, the lowest-redshift Broad Absorption Line (BAL) QSO known so far and one of the best-studied Ultra Luminous Infrared Galaxies. By combining the XMM-Newton spectral resolution and the high-energy bandpass of BeppoSAX we have been able to Study in more detail than previously possible its 0.2-50 keV spectral properties. The BeppoSAX PDS data unveiled, for the first time, a highly absorbed (NHsimilar to2x10(24) cm(-2)) power-law component. We find that: a) below 10 keV we are seeing only reprocessed radiation through reflection and/or scattering; b) the intrinsic 2-10 keV luminosity of MKN 231 is 1(-0.5)(+1.0)x10(44) erg s(-1), i.e. more than an order of magnitude greater than previous measurements; c) the starburst activity significantly contributes to the soft (E<2 keV) X-ray emission.

引用

页码：79 / 88

页数：10

共 45 条

[1] BeppoSAX, the wide band mission for X-ray astronomy [J].