XMM-NEWTON OBSERVATIONS OF THE SEYFERT 2 GALAXY NGC 7590: THE NATURE OF X-RAY ABSORPTION

被引：10
作者：
Shu, X. W. [1 ]
Liu, T. [1 ]
Wang, J. X. [1 ]
机构：
[1] Univ Sci & Technol China, CAS Key Lab Res Galaxies & Cosmol, Dept Astron, Hefei 230026, Anhui, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2010年 / 722卷 / 01期
关键词：
galaxies: active; galaxies: individual (NGC 7590); galaxies: nuclei; X-rays: galaxies; ACTIVE GALACTIC NUCLEI; BROAD-LINE REGIONS; CHANDRA OBSERVATIONS; EMISSION-LINE; NO ABSORPTION; OBSCURATION; SAMPLE; OBJECTS; AGN;
D O I：
10.1088/0004-637X/722/1/96
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the analysis of three XMM-Newton observations of the Seyfert 2 galaxy NGC 7590. The source was found to have no X-ray absorption in the low spatial resolution ASCA data. The XMM-Newton observations provide a factor of similar to 10 better spatial resolution than previous ASCA data. We find that the X-ray emission of NGC 7590 is dominated by an off-nuclear ultra-luminous X-ray source and an extended emission from the host galaxy. The nuclear X-ray emission is rather weak compared with the host galaxy. Based on its very low X-ray luminosity as well as the small ratio between the 2-10 keV and the [OIII] fluxes, we interpret NGC 7590 as Compton-thick rather than being an "unobscured" Seyfert 2 galaxy. Future higher resolution observations such as Chandra are crucial to shed light on the nature of the NGC 7590 nucleus.
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页码：96 / 101
页数：6
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