Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey
Supermassive Black Hole Binary Candidates from the Pan-STARRS1 Medium Deep Survey
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DOI：
10.3847/1538-4357/ab40cb
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发表时间：
2017-10
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影响因子：
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通讯作者：
T. Liu;S. Gezari;M. Ayers;W. Burgett;K. Chambers;K. Hodapp;M. Huber;R. Kudritzki;N. Metcalfe;J. Tonry;R. Wainscoat;C. Waters
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文献类型：
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作者：
T. Liu;S. Gezari;M. Ayers;W. Burgett;K. Chambers;K. Hodapp;M. Huber;R. Kudritzki;N. Metcalfe;J. Tonry;R. Wainscoat;C. Waters
我们提出了一个系统的搜索周期性变化的类星体和超大质量黑洞二进制（SMBHB）的候选人在泛星1中深调查（MDS）。从50 °2天区的109000个色选类星体中，我们初步确定了26个变化周期超过1.5个的候选类星体。我们通过探索频道望远镜和拉斯坎布雷斯天文台网络的成像活动扩展了观测基线，并使用更严格的最大似然方法重新评估候选人。使用一系列的统计标准，并假设正常类星体的变异阻尼随机游走模型，我们确定一个统计上显着的周期候选人。我们还调查了使用我们的研究与MDS作为基准的大型综合巡天望远镜探测SMBHB的能力，并探讨了我们样本中SMBHB的任何互补多波长证据。
We present a systematic search for periodically varying quasar and supermassive black hole binary (SMBHB) candidates in the Pan-STARRS1 Medium Deep Survey (MDS). From ∼9000 color-selected quasars in an ∼50 °2 sky area, we initially identify 26 candidates with more than 1.5 cycles of variation. We extend the baseline of observations via our imaging campaign with the Discovery Channel Telescope and the Las Cumbres Observatory network and reevaluate the candidates using a more rigorous, maximum likelihood method. Using a range of statistical criteria and assuming the damped random walk model for normal quasar variability, we identify one statistically significant periodic candidate. We also investigate the capabilities of detecting SMBHBs with the Large Synoptic Survey Telescope using our study with MDS as a benchmark and explore any complementary multiwavelength evidence for SMBHBs in our sample.