Photometry of three gamma-ray-loud quasars and implications for supermassive black holes
Photometry of three gamma-ray-loud quasars and implications for supermassive black holes
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DOI：
10.1046/j.1365-8711.2002.05528.x
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发表时间：
2002-08
影响因子：
4.8
通讯作者：
G. Xie;G. Xie;E. Liang;E. Liang;S. Zhou;S. Zhou;Kuanyi Li;B. Dai;B. Dai;Li Ma
中科院分区：
文献类型：
--
作者：
G. Xie;G. Xie;E. Liang;E. Liang;S. Zhou;S. Zhou;Kuanyi Li;B. Dai;B. Dai;Li Ma
给出了2001年期间对PKS 1510-089、3C 279和OJ 248三个γ射线巨噪类星体在B、V和R波段的测光结果及其对超大质量黑洞（SMBH）模型的意义。结果表明，在观测过程中，这三颗类星体都有明显的、不规则的快速爆发，爆发的时间尺度约为40-60 min，爆发的振幅约为0.60 -1.26 mag。对于3C 279和OJ 248，SMBH的质量上限是根据观测到的最小光学变化时间尺度估计的，下限也是通过Dermer和Gehrels提出的方法估计的。两种方法得到的质量都是合理的。对于PKS 1510-089，还观察到新的亮度最小值。分析1999年至2001年的观测结果，观察到三个极小值。虽然它们的光变曲线采样很差，但有趣的是，这些最小值的间隔约为43分钟，似乎表明可能存在周期性现象。因此，提出了一个假设来解释这一现象，即中心存在一个双黑洞系统。系统的参数估计是通过一个非常简单的方法。在观测坐标系中，周期约为336 ± 14 d，主黑洞和次黑洞的质量分别为10（8.0）和10（6.2）M圆点，两黑洞之间的距离为10（15.81）cm（主黑洞的378 R（g）），系统的寿命为10（6.0）年。这些结果似乎表明PKS 1510-089是另一个可能的候选双星黑洞系统。今后应进行监测，以获得更多数据，用于进一步分析，以检验假设。
The results of photometry of three gamma-ray-loud quasars, PKS 1510-089, 3C 279 and OJ248, during 2001 in the B, V and R bands and implications for the supermassive black hole (SMBH) model in these objects are presented. The results show that the three quasars had significant, but irregular, rapid outbursts with a typical time-scale of about 40-60 min and a typical amplitude of about Deltam similar or equal to0.60-1.26 mag during the observations. For 3C 279 and OJ248 the upper limits of the masses of SMBHs are estimated from the observed minimum optical variability time-scale, and the lower limits are also estimated by a method proposed by Dermer & Gehrels. The masses derived from both methods are reasonable. For PKS 1510-089 a new brightness minima was also observed. Analysing the observations from 1999 to 2001, three minima were observed. Although their light curves are poorly sampled, it is intriguing to note that these minimum at intervals of about 43 min seem to indicate the possibility of a periodic phenomenon. So a hypothesis is proposed to interpret the phenomenon, suggesting that there is a binary black hole system at the centre. The parameters of the system are estimated by a very simple method. The periodicity is about 336+/-14 d in the observed frame; the masses of the primary and secondary black holes are 10(8.0) and 10(6.2) M-circle dot, respectively; the distance between two black holes is 10(15.81) cm (378R (g) of the primary black hole), and the lifetime of the system is 10(6.0) yr. These results seem to indicate that PKS 1510-089 is another possible candidate binary black hole system. It should be monitored in future to obtain more data for further analysis to test the hypothesis.