Bibcode
Muñoz, J. A.; Mediavilla, E.; Kochanek, C. S.; Falco, E. E.; Mosquera, A. M.
Bibliographical reference
The Astrophysical Journal, Volume 742, Issue 2, article id. 67 (2011).
Advertised on:
12
2011
Journal
Citations
35
Refereed citations
32
Description
We report Hubble Space Telescope observations of six gravitational
lenses with the Advanced Camera for Surveys. We measured the flux ratios
between the lensed images in seven filters from 8140 Å to 2200
Å. In three of the systems, HE0512-3329, B1600+434, and
H1413+117, we were able to construct UV extinction curves partially
overlapping the 2175 Å feature and characterize the properties of
the dust relative to the Galaxy and the Magellanic Clouds. In
HE1104-1804, we detect chromatic microlensing and use it to study
the physical properties of the quasar accretion disk. For a Gaussian
model of the disk exp (- r 2/2r 2 s
), scaling with wavelength as rs vpropλ p
, we estimate rs (λ3363) = 4+4
- 2 (7 ± 4) light days and p = 1.1 ± 0.6
(1.0 ± 0.6) for a logarithmic (linear) prior on rs .
The remaining two systems, FBQ0951+2635 and SBS1520+530, yielded no
useful estimates of extinction or chromatic microlensing.
Based on observations made with the NASA/ESA Hubble Space Telescope. The
Space Telescope Science Institute is operated by the Association of
Universities for Research in Astronomy, Inc., under NASA contract NAS
5-26555.
Related projects
Relativistic and Theoretical Astrophysics
Introduction Gravitational lenses are a powerful tool for Astrophysics and Cosmology. The goals of this project are: i) to obtain a robust determination of the Hubble constant from the time delay measured between the images of a lensed quasar; ii) to study the individual and statistical properties of dark matter condensations in lens galaxies from
Evencio
Mediavilla Gradolph