On the black hole mass–radio luminosity relation for flat-spectrum radio-loud quasars
On the black hole mass–radio luminosity relation for flat-spectrum radio-loud quasars
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DOI：
10.1046/j.1365-8711.2002.05997.x
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发表时间：
2002-10
影响因子：
4.8
通讯作者：
M. Jarvis;R. McLure
中科院分区：
文献类型：
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作者：
M. Jarvis;R. McLure
本文对射电选择平谱类星体（FSQs）中黑洞质量与射电光度之间的关系进行了新的分析。与最近文献中的说法相反，我们没有发现证据表明无线电选择的FSQs的黑洞质量系统地低于光学选择的发光射电响亮类星体的黑洞质量。通过利用Hβ发射线的线宽作为中心引力势的示踪剂的维里黑洞质量估计器估计了FSQs的黑洞质量。通过修正由于FSQs被近距离观察而产生的不可避免的倾斜影响，我们发现具有内在强大射电喷流的FSQs的黑洞质量几乎完全限制在Mbh bbb108m³。这与先前对光学选择FSQs和陡谱射电大声类星体的研究非常一致。最后，在应用实际的多普勒增强校正后，我们发现FSQs占据了很大的固有射电亮度范围，并且许多源将更准确地归类为射电中间或射电安静类星体。射电亮度的这一范围表明，FSQs与l5ghz∝m2.5 bh形式的射电功率的上边界完全一致。
A new analysis of the connection between black hole mass and radio luminosity in radioselected flat-spectrum quasars (FSQs) is presented. In contrast to recent claims in the literature, we find no evidence that the black hole masses of radio-selected FSQs are systematically lower than those of luminous optically selected radio-loud quasars. The black hole masses of the FSQs are estimated via the virial black hole mass estimator which utilizes the linewidth of the Hβ emission line as a tracer of the central gravitational potential. By correcting for the inevitable effects of inclination, incurred as a result of the FSQs being viewed close to the line of sight, we find that the black hole masses of the FSQs with intrinsically powerful radio jets are confined, virtually exclusively, to Mbh > 10 8 M� . This is in good agreement with previous studies of optically selected FSQs and steep-spectrum radio-loud quasars. Finally, following the application of a realistic Doppler boosting correction, we find that the FSQs occupy a wide range in intrinsic radio luminosity, and that many sources would be more accurately classified as radio-intermediate or radio-quiet quasars. This range in radio luminosity suggests that the FSQs are fully consistent with an upper boundary on radio power of the form L 5 GHz ∝ M 2.5 bh .