Issue |
A&A
Volume 450, Number 2, May I 2006
|
|
---|---|---|
Page(s) | 461 - 469 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20052929 | |
Published online | 10 April 2006 |
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses
IV. Models of prospective time-delay lenses
1
Astronomy Unit, Queen Mary and Westfield College, University of London, London E1 4NS, UK
2
Institüt für Theoretische Physik, Universität Zürich, Winterthurerstr. 190, 8057 Zürich, Switzerland
3
Laboratoire d'Astrophysique, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire, 1290 Sauverny, Switzerland e-mail: frederic.courbin@epfl.ch
4
School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK
Received:
24
February
2005
Accepted:
16
January
2006
Aims.To predict time delays for a sample of gravitationally lensed quasars and to evaluate the accuracy that can be realistically achieved on the value of H0.
Methods.We consider 14 lensed quasars that are candidates for
time-delay monitoring and model them in detail using pixelized lens
models. For each system, we provide a mass map, arrival-time surface
and the distribution of predicted time-delays in a concordance
cosmology, assuming Gyr (
in local units).
Based on the predicted time-delays and on the observational
circumstances, we rate each lens as “excellent” or “good” or
“unpromising” for time-delay monitoring. Finally, we analyze
simulated time delays for the 11 lens rated excellent or good, and
show that H0 can be recovered to a precision of 5%.
Results.In combination with COSMOGRAIL Paper I on the temporal sampling of lensed quasar light curves, the present work will help to optimize the strategy of the monitoring campaigns of lensed quasars.
© ESO, 2006
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