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

页码：171 / 176

页数：6

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