Bibcode
Falco, E.; Motta, V.; Muñoz, J. A.; Kochanek, C. S.; Jimenez-Vicente, J.; Mediavilla, E.; Guerras, E.
Bibliographical reference
The Astrophysical Journal, Volume 764, Issue 2, article id. 160, 9 pp. (2013).
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2
2013
Journal
Citations
74
Refereed citations
69
Description
We measure the differential microlensing of the broad emission lines
between 18 quasar image pairs in 16 gravitational lenses. We find that
the broad emission lines are in general weakly microlensed. The results
show, at a modest level of confidence (1.8σ), that high ionization
lines such as C IV are more strongly microlensed than low ionization
lines such as Hβ, indicating that the high ionization line emission
regions are more compact. If we statistically model the distribution of
microlensing magnifications, we obtain estimates for the broad line
region size of rs = 24+22 –15 and
rs = 55+150 –35 lt-day (90%
confidence) for the high and low ionization lines, respectively. When
the samples are divided into higher and lower luminosity quasars, we
find that the line emission regions of more luminous quasars are larger,
with a slope consistent with the expected scaling from photoionization
models. Our estimates also agree well with the results from local
reveberation mapping studies.
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