The narrow-line quasar NAB 0205+024 observed with XMM-Newton

被引：7

作者：

Gallo, LC

Boller, T

Brandt, WN

Fabian, AC

Vaughan, S

机构：

[1] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

[2] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

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

[4] Univ Leicester, Dept Phys & Astron, Xray & Observ Astron Grp, Leicester LE1 7RH, Leics, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 355卷 / 02期

关键词：

galaxies : active; galaxies : individual : NAB 0205+024; galaxies : nuclei; X-rays : galaxies;

D O I：

10.1111/j.1365-2966.2004.08357.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The XMM-Newton observation of the narrow-line quasar NAB0205+024 reveals three striking differences since it was last observed in X-rays with ASCA. First, the 2-10 keV power law is notably steeper. Secondly, a hard X-ray flare is detected, very similar to that seen in I Zw 1. Thirdly, a strong and broad emission feature is detected with the bulk of its emission redward of 6.4 keV, and extending down to similar to5 keV in the rest frame. The most likely explanation for the broad feature is neutral iron emission emitted from a narrow annulus of an accretion disc close to the black hole. The hard X-ray flare could be the mechanism that illuminates this region of the disc, allowing for the emission line to be detected. The combination of effects can be understood in terms of the `thunder-cloud' model proposed by Merloni Fabian.

引用

页码：330 / 335

页数：6

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