X-Ray Time Variability Across the Atoll Source States of 4U 1636–53
X-Ray Time Variability Across the Atoll Source States of 4U 1636–53
复制标题
DOI：
10.1086/590897
复制
发表时间：
2008-06
期刊：
影响因子：
--
通讯作者：
D. Altamirano;M. van der Klis;M. M'endez;P. Jonker;M. Klein-Wolt;W. Lewin
中科院分区：
文献类型：
--
作者：
D. Altamirano;M. van der Klis;M. M'endez;P. Jonker;M. Klein-Wolt;W. Lewin
我们使用 Rossi X 射线计时探测器 (RXTE) 的比例计数器阵列对香蕉州的环礁源 4U 1636-53 进行了 149 个点观测，研究了快速 X 射线时间变化，并且首次使用 RXTE 在岛屿州进行了观测。我们将 4U 1636-53 的变率分量的频率与其他环礁和 Z 源中的频率进行比较，发现 4U 1636-53 遵循先前在（有时）较低光度的其他环礁源中发现的通用相关方案。我们对百赫兹 QPO 的结果表明，设置其频率的机制与其他组件的机制不同，而幅度设置机制是常见的。我们的数据或其他来源的先前数据均不支持先前提出的对不同源中窄低频 QPO 频率在谐波模式切换方面的解释，并且发现该 QPO 覆盖的频率范围与自旋、角动量或光度无关。
We have studied the rapid X-ray time variability in 149 pointed observations with the Rossi X-Ray Timing Explorer (RXTE)’s Proportional Counter Array of the atoll source 4U 1636–53 in the banana state and, for the first time with RXTE, in the island state. We compare the frequencies of the variability components of 4U 1636–53 with those in other atoll and Z sources and find that 4U 1636–53 follows the universal scheme of correlations previously found for other atoll sources at (sometimes much) lower luminosities. Our results on the hectohertz QPO suggest that the mechanism that sets its frequency differs from that for the other components, while the amplitude-setting mechanism is common. A previously proposed interpretation of the narrow low-frequency QPO frequencies in different sources in terms of harmonic mode switching is not supported by our data or by previous data on other sources, and the frequency range that this QPO covers is found to be unrelated to spin, angular momentum, or luminosity.