Seven years with the Swift Supergiant Fast X-ray Transients project

被引：25

作者：

Romano, P. ^{[1
]}

机构：

[1] INAF, IASF Palermo, Via U La Malfa 153, I-90146 Palermo, Italy

来源：

JOURNAL OF HIGH ENERGY ASTROPHYSICS | 2015年 / 7卷

关键词：

X-rays: binaries; X-rays: individual (IGRJ16493-4348, AXJ1845.0,0433);

D O I：

10.1016/j.jheap.2015.04.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Supergiant Fast X-ray Transients (SFXTs) are HMXBs with OB supergiant companions. I review the results of the Swift SFXT project, which since 2007 has been exploiting Swift's capabilities in a systematic study of SFXTs and supergiant X-ray binaries (SGXBs) by combining follow-ups of outbursts, when detailed broad-band spectroscopy is possible, with long-term monitoring campaigns, when the out-of-outburst fainter states can be observed. This strategy has led us to measure their duty cycles as a function of luminosity, to extract their differential luminosity distributions in the soft X-ray domain, and to compare, with unprecedented detail, the X-ray variability in these different classes of sources. I also discuss the "seventh year crisis", the challenges that the recent Swift observations are making to the prevailing models attempting to explain the SFXT behavior. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：126 / 136

页数：11

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