AXJ1749+684: a narrow-emission-line galaxy with a flat X-ray spectrum

被引：16

作者：

Iwasawa, K ^{[1
]}

Fabian, AC ^{[1
]}

Brandt, WN ^{[1
]}

Crawford, CS ^{[1
]}

Almaini, O ^{[1
]}

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1997年 / 291卷 / 01期

关键词：

galaxies: active; galaxies: individual: AXJ1749+684; X-rays: galaxies;

D O I：

10.1093/mnras/291.1.L17

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the serendipitous detection of an X-ray source, AX J1749+684, with the ASCA Gas Imaging Spectrometer. AXJ1749+684 is identified with a LINER/starburst-type spiral galaxy KUG 1750+683A at a redshift z = 0.05. It has a hard X-ray spectrum, consistent with that of the X-ray background (XRB) in the 1-10 keV band. Despite the optical classification, the X-ray luminosity cannot be explained by starburst activity. Combined with spatial variations in the optical emission-line ratios, this suggests the presence of an obscured Seyfert nucleus embedded within a star-forming galaxy. Similar behaviour could explain the ambiguous properties of the faint narrow-line X-ray galaxies (NLXGs) emerging from deep X-ray surveys.

引用

页码：L17 / L22

页数：6

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