Bibcode
Fian, C.; Mediavilla, E.; Jiménez-Vicente, J.; Muñoz, J. A.; Hanslmeier, A.
Referencia bibliográfica
The Astrophysical Journal, Volume 869, Issue 2, article id. 132, 8 pp. (2018).
Fecha de publicación:
12
2018
Revista
Número de citas
14
Número de citas referidas
14
Descripción
We present a measurement of the accretion disk size of the quadruple
lensed quasar HE 0435–1223 from well-sampled 13-year COSMOGRAIL
optical light curves. Using accurate time delays for the images A, B, C,
and D, we modeled and removed the intrinsic quasar variability, and
found microlensing events of amplitude up to 0.6, 0.4, and 0.5 mag in
the images A, C, and D, respectively. From the statistics of
microlensing magnifications in these images we use Bayesian methods to
estimate the size of the quasar accretion disk. We have inferred the
half-light radius for the accretion disk using two different methods,
{R}1/2={7.6}-1.1+12.0\sqrt{M/0.3
{M}ȯ } lt-days (histogram product) and
{R}1/2={7.7}-1.2+7.0\sqrt{M/0.3
{M}ȯ } lt-days (χ 2 criterion). The
results are self-consistent and in good agreement with the continuum
size predicted by single-epoch spectroscopy and previous studies making
use of narrowband photometry of HE 0435–1223.
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Evencio
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