A reverberation-based mass for the central black hole in NGC 4151

Misty C. Bentz, Kelly D. Denney, Edward M. Cackett, Matthias Dietrich, Jeffrey K. J. Fogel, Himel Ghosh, Keith Horne, Charles Kuehn, Takeo Minezaki, Christopher A. Onken, Bradley M. Peterson, Richard W. Pogge, Vladimir I. Pronik, Douglas O. Richstone, Sergey G. Sergeev, Marianne Vestergaard, Matthew G. Walker, Yuzuru Yoshii

Research output: Contribution to journalArticlepeer-review

170 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)775-781
Number of pages7
JournalAstrophysical Journal Letters
Volume651
DOIs
Publication statusPublished - 10 Nov 2006

Keywords

  • galaxies : active
  • galaxies : nuclei
  • galaxies : Seyfert
  • ACTIVE GALACTIC NUCLEI
  • BROAD-LINE REGION
  • SEYFERT 1 GALAXIES
  • EMISSION-LINES
  • STANDARD STARS
  • HIGH-REDSHIFT
  • NGC 4151
  • VARIABILITY
  • NGC-5548
  • SIZE

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