arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2209.00282astro-ph.HE
收藏

使用Suzaku对LMXB 2S 0921-63进行宽带光谱分析

Broad-band spectral analysis of LMXB 2S 0921-63 with Suzaku

Prince Sharma, Chetana Jain, Anjan Dutta

摘要:

本文利用朱雀星的档案资料,对低质量X射线双星2S 0921-63进行了四次近距离观测,观测范围在0.31 - 1.16之间。这是首次对2S 0921-63进行了高达25 keV的宽带光谱分析。在观察期间,0.5-10 keV XIS计数率在$\sim$ 1和$^{-1}$ 5计数之间变化。在观测期间,观测到了部分X射线食和广泛的食后强度下降。在强度下降期间,X射线发射略微硬化。我们已经模拟的源光谱,同时拟合的XIS和HXD-PIN光谱的四个观测。该源的宽带光谱可以通过一个模型来描述,该模型包括温度为$kT_{\rm BB} \approx$ 1.66 - 2.13 keV的非常热的黑体、高能截止功率定律和$E_{\rm line} \sim$ 6.7 keV的Fe发射线。第二个模型,占康普顿化的热辐射从吸积盘沿铁发射线,描述了宽带光谱的2S 0921-63同样好。

英文摘要:

We present the broad-band spectral analysis of the low-mass X-ray binary 2S 0921-63 by using the Suzaku archival data covering the orbital phase between 0.31 and 1.16 during four close observations. It is the first time that a broad-band spectral analysis of 2S 0921-63 has been done up to 25 keV. The 0.5-10 keV XIS count rate varied between $\sim$ 1 and $\sim$ 5 counts s$^{-1}$ during the observations. A partial X-ray eclipse and broad post-eclipse intensity dip were observed during the observations. The X-ray emission hardened marginally during the intensity dip. We have modelled the source spectra by simultaneously fitting the XIS and HXD-PIN spectra for each of the four observations. The broad-band spectra of the source can be described by a model comprising a very hot blackbody having temperature, $kT_{\rm BB} \approx$ 1.66 - 2.13 keV, a high-energy cutoff power law, and an Fe emission line at $E_{\rm line} \sim$ 6.7 keV. A second model, accounting for the Comptonization of the thermal emission from accretion disc along with an Fe emission line, describes the broad-band spectra of 2S 0921-63 equally 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。

↑