论文标题
XTE J1650-500在其2001年爆发期间的时间域变异性能：圆盘射流的证据
Time-domain variability properties of XTE J1650-500 during its 2001 outburst: Evidence of disc-jet connection
论文作者
论文摘要
银河瞬态源的可变性特性的演变是一种诊断工具，可以理解积聚流的各种机制及其靠近中央黑洞的动力学。在本文中，我们集中于X射线瞬态XTE XTE J1650-500的可变性，并研究了粘性延迟，时间滞后，QPO，QPO频率及其能量依赖性在2001年爆发过程中观察到的整个上升阶段的能量依赖性。 RXTE/ASM观察到的光曲线； （2）在较低的能量（4-8 KEV）范围内观察到具有高RMS值的QPO； （3）在上升阶段的最初几天，QPO频率和相关时间滞后是抗相关的，后来发现它们是相关的； （4）在硬状态的最初几天，铁线光子相对于硬和软光子的时间滞后几乎保持恒定，并且在状态过渡期间的滞后幅度增加。我们对GX 339-4和XTE J1550-564的爆发进行了比较研究。我们发现爆发期间与QPO特征相关的时间滞后的演变 - 低能时QPO较强，而宽Fe线光子的恒定滞后呈现出XTE J1650-500中爆发曲线的独特性质。通过考虑更接近中央黑洞的磁盘喷射几何形状来解释这种变异性的可能原因。
Evolution of variability properties of Galactic transient sources is a diagnostic tool to understand various regimes of the accretion flow and its dynamics close to the central black hole. In this paper, we concentrate on the variability properties of the X-ray transient XTE J1650-500 and investigate the evolution of viscous delay, time lag, QPO frequency, and their energy dependence throughout the rising phase as observed by RXTE during its outburst in 2001. Our analysis reveals (1) a delay of 12 \pm 1 days between one day averaged hard (5-12 keV) and soft (1.5-3 keV) photon light-curves as observed by RXTE/ASM; (2) QPOs with high rms values are observed in lower energy (4-8 keV) range; (3) the QPO frequencies and associated time lags were anti-correlated during the initial days of the rising phase, and later on, they were found to be correlated; (4) the time lags of iron line photons with respect to hard and soft photons remained almost constant during the initial days of hard state and the lag magnitude increased during the state transition. We perform comparative studies with outbursts of GX 339-4 and XTE J1550-564. We find the evolution of time lags associated with the QPO characteristics during the outburst - stronger QPOs at low energy, and constant lags of broad Fe-line photons present a unique nature of outburst profile in XTE J1650-500. The possible cause of such variabilities is explained by considering disk-jet geometry closer to the central black hole.
