THE MASS OF THE CENTRAL BLACK HOLE IN THE NEARBY SEYFERT GALAXY NGC 5273
THE MASS OF THE CENTRAL BLACK HOLE IN THE NEARBY SEYFERT GALAXY NGC 5273
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DOI：
10.1088/0004-637x/796/1/8
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
M. Bentz;D. Horenstein;C. Bazhaw;E. Manne-Nicholas;B. Ou-Yang;M. Anderson;Jeremy Jones;R. Norris;J. Parks;D. Saylor;K. Teems;C. Turner
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文献类型：
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作者：
M. Bentz;D. Horenstein;C. Bazhaw;E. Manne-Nicholas;B. Ou-Yang;M. Anderson;Jeremy Jones;R. Norris;J. Parks;D. Saylor;K. Teems;C. Turner
我们介绍了针对NGC5273的混响映射程序的结果，NGC5273是附近的一个具有宽线活动星系核(AGN)的早期类型星系。在监测计划的整个过程中，NGC 5273显示出很强的可变性，这使得我们能够测量宽的光学复合线对连续谱通量变化的响应的时间延迟。这些测量的加权平均值得到了黑洞质量的确定：MBH=(4.7±1.6)×106M☉。对NGC5273中黑洞影响球大小的估计表明，它正好处于目前地面大口径望远镜所能达到的分辨率的极限。因此，NGC 5273是未来通过恒星动力学模型确定黑洞质量的重要目标，特别是因为它是附近唯一拥有基于混响质量的活动星系核的早期类型星系，因此可以对通过这两种技术确定的质量进行最佳比较。
We present the results of a reverberation-mapping program targeting NGC 5273, a nearby early-type galaxy with a broad-lined active galactic nucleus (AGN). Over the course of the monitoring program, NGC 5273 showed strong variability that allowed us to measure time delays in the responses of the broad optical recombination lines to changes in the continuum flux. A weighted average of these measurements results in a black hole mass determination of MBH = (4.7 ± 1.6) × 106 M☉. An estimate of the size of the black hole sphere of influence in NGC 5273 puts it just at the limit of the resolution achievable with current ground-based large aperture telescopes. NGC 5273 is therefore an important future target for a black hole mass determination from stellar dynamical modeling, especially because it is the only nearby early-type galaxy hosting an AGN with a reverberation-based mass, allowing the best comparison for the masses determined from these two techniques.