期刊
ASTROPHYSICAL JOURNAL
卷 651, 期 2, 页码 775-781出版社
IOP PUBLISHING LTD
DOI: 10.1086/507417
关键词
galaxies : active; galaxies : nuclei; galaxies : Seyfert
资金
- Science and Technology Facilities Council [PP/D000890/1] Funding Source: researchfish
- STFC [PP/D000890/1] Funding Source: UKRI
We have undertaken a new ground-based monitoring campaign to improve the estimates of the mass of the central black hole in NGC 4151. We measure the lag time of the broad H beta line response compared to the optical continuum at 5100 angstrom and find a lag of 6.6(-0.8)(+1.1) days. We combine our data with the recent reanalysis of UV emission lines by Metzroth and coworkers to calculate a weighted mean of the black hole mass, M-BH = (4.57(-0.47)(+0.57))x10(7) M-circle dot. The absolute calibration of the black hole mass is based on normalization of the AGN black hole mass-stellar velocity dispersion (M-BH-sigma(*)) relationship to that of quiescent galaxies by Onken and coworkers. The scatter in the M-BH-sigma(*) relationship suggests that reverberation-mapping-based mass measurements are typically uncertain by a factor of 3-4.
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