arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.01211astro-ph.HE
收藏

黑洞X射线双星中不同谱态的谱相关和时间相关相似吗?

Are spectral and timing correlations similar in different spectral states in black hole X-ray binaries?

M. Kalamkar, M. T. Reynolds, M. van der Klis, D. Altamirano, J. M. Miller

摘要:

利用Swift X射线望远镜研究了黑洞X射线双星MAXI J1659-152、Swift J1753.5- 0127和GX 339-4的爆发。X射线望远镜的带通可以接收到来自吸积流两个组成部分的辐射:吸积盘和日冕/热流。这使得相关的光谱和可变性的研究,从吸积流的两个组件的可变性。我们提出的第一次,在不同的光谱状态的所有功率谱分量的光谱参数(磁盘温度和半径)和时间参数(频率和强度)的演变的联合研究。不同谱态下的相关性比较表明,功率谱分量的频率和强度对磁盘温度的依赖性在(低)硬态和硬-中间态下是不同的;大多数在硬中间态中可以清楚地观察到的相关性(在MAXI J1659-152和GX 339-4中)在(低)硬态(在GX 339-4和SWIFT J1753.5-0127中)中未观察到。此外,各个频率分量对磁盘温度变化的响应从一个分量到下一个分量明显不同。因此,频谱定时演变不能用跨越这两个频谱状态的单个相关性来解释。我们讨论我们的研究结果的背景下,现有的模型提出解释的起源的变异性。

英文摘要:

We study the outbursts of the black hole X-ray binaries MAXI J1659-152, SWIFT J1753.5--0127 and GX 339-4 with the Swift X-ray Telescope. The bandpass of the X-ray Telescope has access to emission from both components of the accretion flow: the accretion disk and the corona/hot flow. This allows a correlated spectral and variability study, with variability from both components of the accretion flow. We present for the first time, a combined study of the evolution of spectral parameters (disk temperature and radius) and timing parameters (frequency and strength) of all power spectral components in different spectral states. Comparison of the correlations in different spectral states shows that the frequency and strength of the power spectral components exhibit dependencies on the disk temperature that are different in the (low-)hard and the hard-intermediate states; most of these correlations that are clearly observed in the hard-intermediate state (in MAXI J1659-152 and GX 339-4) are not seen in the (low-)hard state (in GX 339-4 and SWIFT J1753.5-0127). Also, the responses of the individual frequency components to changes in the disk temperature are markedly different from one component to the next. Hence, the spectral-timing evolution cannot be explained by a single correlation that spans both these spectral states. We discuss our findings in the context of the existing models proposed to explain the origin of variability.

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。

↑