publication . Article . 2018

Quasar Accretion Disk Sizes from Continuum Reverberation Mapping from the Dark Energy Survey

D. Mudd; P. Martini; Ying Zu; C. S. Kochanek; Bradley M. Peterson; Richard Kessler; Tamara M. Davis; J. Hoorman; Andrew King; C. Lidman; ...
Open Access
  • Published: 30 Jul 2018 Journal: The Astrophysical Journal, volume 862, page 123 (eissn: 1538-4357, Copyright policy)
  • Publisher: American Astronomical Society
Abstract
We present accretion disk size measurements for 15 luminous quasars at $0.7 \leq z \leq 1.9$ derived from $griz$ light curves from the Dark Energy Survey. We measure the disk sizes with continuum reverberation mapping using two methods, both of which are derived from the expectation that accretion disks have a radial temperature gradient and the continuum emission at a given radius is well-described by a single blackbody. In the first method we measure the relative lags between the multiband light curves, which provides the relative time lag between shorter and longer wavelength variations. From this, we are only able to constrain upper limits on disk sizes, as ...
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Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics::High Energy Astrophysical Phenomena
free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Reverberation mapping, Gravitational microlensing, Light curve, Continuum (design consultancy), Quasar, Physics, Photometry (optics), Accretion (meteorology), Thin disk, Astrophysics
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