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    Dynamical black hole masses of BL Lac objects from the Sloan Digital Sky Survey

    251720.pdf (779.8Kb)
    Access Status
    Open access
    Authors
    Plotkin, Richard
    Markoff, S.
    Trager, S.
    Anderson, S.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Plotkin, R. and Markoff, S. and Trager, S. and Anderson, S. 2011. Dynamical black hole masses of BL Lac objects from the Sloan Digital Sky Survey. Monthly Notices of the Royal Astronomical Society. 413 (2): pp. 805-812.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1111/j.1365-2966.2010.18172.x
    ISSN
    0035-8711
    School
    Department of Physics and Astronomy
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/52454
    Collection
    • Curtin Research Publications
    Abstract

    We measure black hole masses for 71 BL Lac objects from the Sloan Digital Sky Survey with redshifts out to z~ 0.4. We perform spectral decompositions of their nuclei from their host galaxies and measure their stellar velocity dispersions. Black hole masses are then derived from the black hole mass - stellar velocity dispersion relation. We find BL Lac objects host black holes of similar masses, ~108.5M?, with a dispersion of ±0.4dex, similar to the uncertainties on each black hole measurement. Therefore, all BL Lac objects in our sample have the same indistinguishable black hole mass. These 71 BL Lac objects follow the black hole mass-bulge luminosity relation, and their narrow range of host galaxy luminosities confirm previous claims that BL Lac host galaxies can be treated as standard candles. We conclude that the observed diversity in the shapes of BL Lac object spectral energy distributions is not strongly driven by black hole mass or host galaxy properties. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.

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