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首页> 外文期刊>The Astrophysical Journal. Supplement Series >A LARGE SYSTEMATIC SEARCH FOR CLOSE SUPERMASSIVE BINARY AND RAPIDLY RECOILING BLACK HOLES. II. CONTINUED SPECTROSCOPIC MONITORING AND OPTICAL FLUX VARIABILITY
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A LARGE SYSTEMATIC SEARCH FOR CLOSE SUPERMASSIVE BINARY AND RAPIDLY RECOILING BLACK HOLES. II. CONTINUED SPECTROSCOPIC MONITORING AND OPTICAL FLUX VARIABILITY

机译：大型系统搜索，用于紧密的超二进制和快速反冲黑洞。二。连续光谱监测和光通量变化

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We present new spectroscopic observations that are part of our continuing monitoring campaign of 88 quasars at z < 0.7 whose broad H beta lines are offset from their systemic redshifts by a few thousand km s(-1). These quasars have been considered as candidates for hosting supermassive black hole binaries (SBHBs) by analogy with single-lined spectroscopic binary stars. We present the data and describe our improved analysis techniques, which include an extensive evaluation of uncertainties. We also present a variety of measurements from the spectra that are of general interest and will be useful in later stages of our analysis. Additionally, we take this opportunity to study the variability of the optical continuum and integrated flux of the broad Ha line. We compare the variability properties of the SBHB candidates to those of a sample of typical quasars with similar redshifts and luminosities observed multiple times during the Sloan Digital Sky Survey. We find that the variability properties of the two samples are similar (variability amplitudes of 10%-30% on timescales of approximately 1-7 years) and that their structure functions can be described by a common model with parameters characteristic of typical quasars. These results suggest that the broad-line regions of SBHB candidates have a similar extent as those of typical quasars. We discuss the implications of this result for the SBHB scenario and the ensuing constraints on the orbital parameters.
机译：我们提出了新的光谱学观测结果，这是我们在z <0.7的88个类星体的持续监视活动的一部分，这些类星体的宽H beta线与它们的系统性红移相距数千千米s（-1）。这些类星体与单线光谱双星相似，被认为是超大质量黑洞双星（SBHB）的候选者。我们提供数据并描述我们改进的分析技术，其中包括对不确定性的广泛评估。我们还提供了人们普遍关注的光谱测量结果，这些测量结果将在我们的分析后期阶段发挥作用。另外，我们借此机会研究光学连续体的变化和宽Ha线的积分通量。我们将SBHB候选者的变异性与典型的类星体的变异性进行了比较，这些类星体在斯隆数字天空调查中多次观察到类似的红移和光度。我们发现这两个样本的变异性性质相似（在大约1-7年的时间尺度上变异幅度为10％-30％），并且它们的结构功能可以通过具有典型类星体特征参数的通用模型来描述。这些结果表明，SBHB候选者的粗线区域与典型类星体的粗线区域相似。我们讨论了该结果对SBHB方案的影响以及随后对轨道参数的约束。

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