arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1207.0682astro-ph.HE
收藏

黑洞候选者XTE J1652-453的XMM-牛顿谱的重新检验

Re-examining the XMM-Newton Spectrum of the Black Hole Candidate XTE J1652-453

Chia-Ying Chiang, R. C. Reis, D. J. Walton, A. C. Fabian

摘要:

黑洞候选者XTE J1652-453的XMM-牛顿光谱显示出一条宽而强的Fe K-α发射线,通常认为是源于内部吸积盘的反射。Hiemstra等人(2011年)使用各种现象学模型分析了这些数据。我们用自洽的相对论反射模型重新研究了光谱。一个狭窄的吸收线接近7.2千电子伏可能存在,如果真的是可能的Fe XXVI吸收线所产生的高度电离,迅速外流盘风。这一特征的蓝移对应于大约11100 km/s的速度,这比在恒星质量黑洞中看到的典型值要大得多。考虑到我们还发现源具有低倾角(i < 32度;接近正面),因此我们将通过流出的底部看到。这可能是异常高速度的一个可能解释。我们使用的反射模型结合相对论卷积内核,它允许两个反时针和逆行黑洞自旋,和治疗潜在的吸收功能与光电离等离子体的物理模型。通过这种方式,假设圆盘没有被截断,我们只能将XTE J1652-453中黑洞的自旋限制在90%置信限下小于~ 0.5 Jc/GM^{2}。

英文摘要:

The XMM-Newton spectrum of the black hole candidate XTE J1652-453 shows a broad and strong Fe K-alpha emission line, generally believed to originate from reflection of the inner accretion disc. These data have been analysed by Hiemstra et al. (2011) using a variety of phenomenological models. We re-examine the spectrum with a self-consistent relativistic reflection model. A narrow absorption line near 7.2 keV may be present, which if real is likely the Fe XXVI absorption line arising from highly ionised, rapidly outflowing disc wind. The blue shift of this feature corresponds to a velocity of about 11100 km/s, which is much larger than the typical values seen in stellar-mass black holes. Given that we also find the source to have a low inclination (i < 32 degrees; close to face-on), we would therefore be seeing through the very base of outflow. This could be a possible explanation for the unusually high velocity. We use a reflection model combined with a relativistic convolution kernel which allows for both prograde and retrograde black hole spin, and treat the potential absorption feature with a physical model for a photo-ionised plasma. In this manner, assuming the disc is not truncated, we could only constrain the spin of the black hole in XTE J1652-453 to be less than ~ 0.5 Jc/GM^{2} at the 90% confidence limit.

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。

↑