AGN X射线时间序列的小波分析：3C 273中的QPO
Wavelet Analysis of AGN X-Ray Time Series: A QPO in 3C 273?
摘要：
准周期信号产生了重要的约束质量的黑洞在银河系X射线双星，在这里，我们将其扩展到活动星系核（AGN）。我们采用小波技术分析了19个观测的10个活动星系核获得的XMM-牛顿EPIC pn相机。我们报告的候选人3.3 KS准周期3C 273的检测。如果这个周期代表一个起源于最后一个稳定轨道3Rs附近的轨道时间尺度，那么它意味着中心黑洞的质量为7.3 × 10^6 Msun。对于最后稳定轨道为0.6 Rs的最大旋转黑洞，中心黑洞质量为8.1 × 10^7 Msun。这两个估计值都大大低于先前的混响映射结果，后者将3C 273的中心黑洞质量定为约2.35 × 10^8 Msun。假设这个反射质量是正确的，则X射线准周期是由吸积盘的高阶振荡模式引起的。
英文摘要：
Quasi-periodic signals have yielded important constraints on the masses of black holes in galactic X-ray binaries, and here we extend this to active galactic nuclei (AGNs). We employ a wavelet technique to analyze 19 observations of 10 AGNs obtained with the XMM-Newton EPIC pn camera. We report the detection of a candidate 3.3 ks quasi period in 3C 273. If this period represents an orbital timescale originating near a last stable orbit of 3Rs, it implies a central black hole mass of 7.3x10^6 Msun. For a maximally rotating black hole with a last stable orbit of 0.6Rs, a central black hole mass of 8.1x10^7 Msun is implied. Both of these estimates are substantially lower than previous reverberation-mapping results, which place the central black hole mass of 3C 273 at about 2.35 x10^8 Msun. Assuming that this reverberation mass is correct, the X-ray quasi period would be caused by a higher order oscillatory mode of the accretion disk.
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。
