Bibcode
DOI
Shalyapin, V. N.; Goicoechea, L. J.; Alcalde, D.; Mediavilla, E.; Muñoz, J. A.; Gil-Merino, R.
Referencia bibliográfica
The Astrophysical Journal, Volume 579, Issue 1, pp. 127-135.
Fecha de publicación:
11
2002
Revista
Número de citas
51
Número de citas referidas
42
Descripción
From the peak of a gravitational microlensing high-magnification event
in the A component of QSO 2237+0305, which was accurately monitored by
the Gravitational Lenses International Time Project collaboration, we
derived new information on the nature and size of the optical V-band and
R-band sources in the distant quasar. If the microlensing peak is caused
by a microcaustic crossing, we first obtain that the standard accretion
disk is a scenario more reliable/feasible than other typical axially
symmetric models. Moreover, the standard scenario fits both the V-band
and R-band observations with reduced χ2 values very close
to 1. Taking into account all these results, a standard accretion disk
around a supermassive black hole is a good candidate for the optical
continuum main source in QSO 2237+0305. Second, using the standard
source model and a robust upper limit on the transverse galactic
velocity, we infer that 90% of the V-band and R-band luminosities are
emitted from a region with a radial size less than
1.2×10-2 pc (=3.7×1016 cm, at a 2
σ confidence level).