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Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line

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arxiv 2410.21387 v2 pith:2LZB5ISR submitted 2024-10-28 astro-ph.GA

E. Dalla Bontà , B.M. Peterson , C.J. Grier , M. Berton , W.N. Brandt , S. Ciroi , E.M. Corsini , B. Dalla Barba
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R. Davies M. Dehghanian R. Edelson L. Foschini D. Gasparri L.C. Ho K. Horne E. Iodice L. Morelli A. Pizzella E. Portaluri Y. Shen D.P. Schneider M. Vestergaard
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The goal of this project is to construct an estimator for the masses of supermassive black holes in active galactic nuclei (AGNs) based on the broad Halpha emission line. We make use of published reverberation mapping data. We remeasure all Halpha time lags from the original data as we find that often the reverberation measurements are improved by detrending the light curves. We produce mass estimators that require only the Halpha luminosity and the width of the Halpha emission line as characterized by either the FWHM or the line dispersion. It is possible, on the basis of a single spectrum covering the Halpha emission line, to estimate the mass of the central supermassive black hole in AGNs, taking into account all three parameters believed to affect mass measurement: luminosity, line width, and Eddington ratio. The typical formal accuracy in such estimates is of order 0.2-0.3 dex.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. AGN Reverberation Mapping with LITMUS: Fundamental Limits on lag Recovery Rates

    astro-ph.CO 2026-08 conditional novelty 7.0 of 10

    A Bayesian re-analysis of 906 OzDES AGN finds that previous reverberation lags, especially for MgII and CIV, are often false positives, with only 3-28% of MgII sources showing simple lags.

  2. A prevalent population of normal-mass central black holes in high-redshift massive galaxies

    astro-ph.GA 2025-02 conditional novelty 7.0 of 10

    A galaxy-based JWST search finds 13 broad-line AGNs in massive galaxies at z~3-5 with normal black hole-to-stellar mass ratios near the local value, indicating that overmassive black holes are not the only early pathway.

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