类星体MACHO 13.5962.237紫外光学连续亮度起伏中的混响
Reverberation in the UV-Optical Continuum Brightness Fluctuations of MACHO Quasar 13.5962.237
摘要：
我们研究了普通类星体在1993 - 1999年期间进行的881次光学亮度测量的紫外-光学光谱区域的亮度波动的性质。我们发现的证据系统的趋势具有一种模式的混响后的初始扰动的字符。初始脉冲的亮度增加了20%，脉冲宽度为50天，混响的典型幅度为12%，平均脉冲宽度为80天，脉冲间隔为90天。无论初始扰动是变亮还是变暗，重复模式都发生在相同的时间尺度上。脉冲序列的滞后与之前在塞弗特星系亮度扰动后宽蓝移发射线的混响中看到的滞后相当，当时考虑了中心物体的质量。除了突发脉冲序列，我们发现的证据，一个半周期的时间尺度为2年。这些强烈的亮度波动模式表明了一种仅从光度监测中发现类星体的方法，并从Pann-Stars和LSST等大型亮度监测计划中获得预期的数据质量。
英文摘要：
We examine the nature of brightness fluctuations in the UV-Optical spectral region of an ordinary quasar with 881 optical brightness measurements made during the epoch 1993 - 1999. We find evidence for systematic trends having the character of a pattern of reverberations following an initial disturbance. The initial pulses have brightness increases of order 20% and pulse widths of 50 days, and the reverberations have typical amplitudes of 12% with longer mean pulse widths of order 80 days and pulse separations of order 90 days. The repeat pattern occurs over the same time scales whether the initial disturbance is a brightening or fading. The lags of the pulse trains are comparable to the lags seen previously in reverberation of the broad blue-shifted emission lines following brightness disturbances in Seyfert galaxies, when allowance is made for the mass of the central object. In addition to the burst pulse trains, we find evidence for a semi-periodicity with a time scale of 2 years. These strong patterns of brightness fluctuations suggest a method of discovering quasars from photometric monitoring alone, with data of the quality expected from large brightness monitoring programs like Pann-Stars and LSST.
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