Stability of the Broad-line Region Geometry and Dynamics in Arp 151 Over Seven Years
Stability of the Broad-line Region Geometry and Dynamics in Arp 151 Over Seven Years
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DOI：
10.3847/1538-4357/aab3c6
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发表时间：
2018-03
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通讯作者：
A. Pancoast;A. Barth;K. Horne;T. Treu;B. Brewer;V. Bennert;G. Canalizo;E. Gates;Weidong Li;M. Malkan;D. Sand;T. Schmidt;S. Valenti;Jong-hak Woo;K. Clubb;M. C. Cooper;S. Crawford;S. Hönig;M. D. Joner;M. Kandrashoff;M. Lazarova;A. Nierenberg;E. Romero-Colmenero;D. Son;E. Tollerud;J. Walsh;H. Winkler
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作者：
A. Pancoast;A. Barth;K. Horne;T. Treu;B. Brewer;V. Bennert;G. Canalizo;E. Gates;Weidong Li;M. Malkan;D. Sand;T. Schmidt;S. Valenti;Jong-hak Woo;K. Clubb;M. C. Cooper;S. Crawford;S. Hönig;M. D. Joner;M. Kandrashoff;M. Lazarova;A. Nierenberg;E. Romero-Colmenero;D. Son;E. Tollerud;J. Walsh;H. Winkler
塞弗特1号星系Arp 151是2008-2015年间三次混响测绘活动的一部分。我们使用宽线区域(BLR)的几何和动力学模型对这些速度分辨混响映射数据集进行建模。通过对三个数据集的独立建模，我们推断了Arp 151中BLR结构在总共7年的时间内的演变，并约束了系统在不变参数(如黑洞质量)中的不确定性。我们发现，在接近正面观察的情况下，厚盘的最大黑洞质量在这段时间内是稳定的，尽管最大黑洞尺寸增长了∼2倍。最大黑洞运动的动力学主要是由流入决定的，尽管最大黑洞尺寸增大，但三个数据集所推断的黑洞质量是一致的。将三个数据集的推断结合在一起，得到黑洞质量和统计不确定度log10(/)=，单项测量的标准偏差为0.13Dex。
The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008–2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log10( / ) = with a standard deviation in individual measurements of 0.13 dex.