Bibcode
Mediavilla, E.; Jiménez-Vicente, J.; Kochanek, C. S.; Muñoz, J. A.; Motta, V.; Falco, E.; Mosquera, A. M.
Referencia bibliográfica
The Astrophysical Journal, Volume 783, Issue 1, article id. 47, 7 pp. (2014).
Fecha de publicación:
3
2014
Revista
Número de citas
64
Número de citas referidas
59
Descripción
We use multi-wavelength microlensing measurements of a sample of 10
image pairs from 8 lensed quasars to study the structure of their
accretion disks. By using spectroscopy or narrowband photometry, we have
been able to remove contamination from the weakly microlensed broad
emission lines, extinction, and any uncertainties in the large-scale
macro magnification of the lens model. We determine a maximum likelihood
estimate for the exponent of the size versus wavelength scaling
(rs vpropλ p , corresponding to a disk
temperature profile of Tvpropr –1/p ) of
p=0.75^{+0.2}_{-0.2} and a Bayesian estimate of p = 0.8 ± 0.2,
which are significantly smaller than the prediction of the thin disk
theory (p = 4/3). We have also obtained a maximum likelihood estimate
for the average quasar accretion disk size of r_s=4.5^{+1.5}_{-1.2}
lt-day at a rest frame wavelength of λ = 1026 Å for
microlenses with a mean mass of M = 1 M ☉, in agreement
with previous results, and larger than expected from thin disk theory.
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Evencio
Mediavilla Gradolph