Broadband spectrum of the X-ray nova SWIFT J174510.8-262411 at the decaying phase of its outburst

被引：4
|
作者：
Grebenev, S. A. [1 ]
Prosvetov, A. V. [1 ]
Burenin, R. A. [1 ]
机构：
[1] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia
来源：
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2014年 / 40卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
X-ray sources; transients; black holes; spectral states; disk accretion; ACCRETING BLACK-HOLES; GX; 339-4; GRS; 1124-68; XTE-J1118+480; VARIABILITY; ULTRAVIOLET; TELESCOPE; MISSION; STATE; BAT;
D O I：
10.1134/S106377371404001X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Results of quasi-simultaneous SWIFT and RTT-150 observations for the X-ray nova SWIFT J174510.8-262411 in May-June 2013 at the decaying phase of its outburst are presented. It is shown that the nova spectrum can be fitted in a very wide energy range (from the infrared z and i bands to hard X-rays) by a single power law attenuated due to absorption but without any traces of the presence of a soft (blackbody) component. The presence of such a component is suggested by the generally accepted models of disk accretion onto a black hole in a binary system. The observation of a single power-law spectrum may imply that synchrotron radiation from the source's relativistic jets makes a major contribution to its flux or that the accretion disk is everywhere hot, optically thin, and radiates nonthermally.
引用
收藏
页码：171 / 176
页数：6
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