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arXiv 1012.3190astro-ph.HE
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朱雀捕捉到了IGR J16207-5129中可能的日食,并确定了IGR J17391-3021中的弱耀斑状态

Suzaku captures a possible eclipse in IGR J16207-5129 and identifies a weak-flaring state in IGR J17391-3021

A. Bodaghee, J. A. Tomsick, J. Rodriguez, S. Chaty, K. Pottschmidt, R. Walter, P. Romano

摘要:

本文介绍了超巨星X射线双星IGR J16207-5129和IGR J17391-3021的朱雀观测结果。对于IGR J16207-5129,我们提供了第一个宽带(0.5- 60 keV)谱,从中我们确认了大的本征柱密度(nH = 16 e ~(22)/cm ~ 2),并首次限制了截止能量(Ec = 19 keV)。我们观察到X射线通量的长时间(> 30 ks)衰减,我们暂时将其归因于可能的中子星被其大质量伴星所食。对于IGR J17391-3021,我们看到了一个从静止到低活动阶段的过渡,其间有微弱的耀斑,其峰值亮度在0.5- 10 keV波段,只有耀斑前的5倍。微弱的燃烧伴随着吸收柱的增加,这表明了模糊风团的增加。将这一观察结果放在最近的雨燕监测活动的背景下,我们现在认识到,这些低活动时期构成了该系统最常见的排放阶段,也许在其他SFXTs中也是如此。

英文摘要:

We present the results from analyses of Suzaku observations of the supergiant X-ray binaries IGR J16207-5129 and IGR J17391-3021. For IGR J16207-5129, we provide the first broadband (0.5--60 keV) spectrum from which we confirm a large intrinsic column density (nH = 16e22 /cm2), and constrain the cutoff energy for the first time (Ec = 19 keV). We observed a prolonged (> 30 ks) attenuation of the X-ray flux which we tentatively attribute to an eclipse of the probable neutron star by its massive companion. For IGR J17391-3021, we witnessed a transition from quiescence to a low-activity phase punctuated by weak flares whose peak luminosities in the 0.5--10 keV band are only a factor of 5 times that of the pre-flare emission. The weak flaring is accompanied by an increase in the absorbing column which suggests the accretion of obscuring clumps of wind. Placing this observation in the context of the recent Swift monitoring campaign, we now recognize that these low-activity epochs constitute the most common emission phase for this system, and perhaps in other SFXTs as well.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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