A REVISED BROAD-LINE REGION RADIUS AND BLACK HOLE MASS FOR THE NARROW-LINE SEYFERT 1 NGC 4051-猫眼课题宝

DOI：

10.1088/0004-637x/702/2/1353

发表时间：

2009-04

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

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作者：

K. Denney;L. Watson;B. Peterson;R. Pogge;D. Atlee;M. Bentz;M. Bentz;Jonathan C. Bird;D. Brokofsky;M. Comins;M. Comins;M. Dietrich;V. Doroshenko;Jason D. Eastman;Y. S. Efimov;C. Gaskell;C. Gaskell;C. H. Hedrick;C. H. Hedrick;S. Klimanov;E. Klimek;E. Klimek;A. Kruse;J. Lamb;K. Leighly;T. Minezaki;S. Nazarov;E. A. Petersen;P. Peterson;S. Poindexter;Y. Schlesinger;K. Sakata;S. Sergeev;J. Tobin;C. Unterborn;M. Vestergaard;M. Vestergaard;A. Watkins;Y. Yoshii

我们展示了主要在 MDM 天文台进行的高采样率、多月混响测绘活动的第一个结果，并支持世界各地望远镜的观测。该活动的主要目标是为几个光度相对较低的活动星系核 (AGN) 获得新的或改进的 Hβ 混响滞后测量。我们在这里重点介绍 NGC 4051 的结果，因为到目前为止，该天体一直是 AGN 尺度关系中的一个显着异常值，例如，它以前是宽线区域 (BLR) 半径与光学连续光度（RBLR-L 关系）之间关系的 ∼2–3σ 异常值。我们通过 NGC 4051 的光谱监测对连续谱和 Hβ 发射线变化之间的滞后时间进行了新测量，得出测量的 BLR 半径为 RBLR = 1.87+0.54−0.50 光天，黑洞质量为 MBH = (1.73+0.55−0.52) × 106 M☉。该半径与基于 NGC 4051 目前的光度和 Bentz 等人对关系的最新校准的 RBLR-L 关系的预期一致。我们还对速度分辨的 Hβ 光变曲线和时间延迟测量进行了初步研究，尽管我们无法重建明确的速度分辨混响信号。

We present the first results from a high sampling rate, multimonth reverberation mapping campaign undertaken primarily at MDM Observatory with supporting observations from telescopes around the world. The primary goal of this campaign was to obtain either new or improved Hβ reverberation lag measurements for several relatively low luminosity active galactic nuclei (AGNs). We feature results for NGC 4051 here because, until now, this object has been a significant outlier from AGN scaling relationships, e.g., it was previously a ∼2–3σ outlier on the relationship between the broad-line region (BLR) radius and the optical continuum luminosity—the RBLR–L relationship. Our new measurements of the lag time between variations in the continuum and Hβ emission line made from spectroscopic monitoring of NGC 4051 lead to a measured BLR radius of RBLR = 1.87+0.54−0.50 light days and black hole mass of MBH = (1.73+0.55−0.52) × 106 M☉. This radius is consistent with that expected from the RBLR–L relationship, based on the present luminosity of NGC 4051 and the most current calibration of the relation by Bentz et al.. We also present a preliminary look at velocity-resolved Hβ light curves and time delay measurements, although we are unable to reconstruct an unambiguous velocity-resolved reverberation signal.

A REVISED BROAD-LINE REGION RADIUS AND BLACK HOLE MASS FOR THE NARROW-LINE SEYFERT 1 NGC 4051

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