Volume 450, Number 2, May I 2006
|Page(s)||461 - 469|
|Section||Cosmology (including clusters of galaxies)|
|Published online||10 April 2006|
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses
IV. Models of prospective time-delay lenses
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: email@example.com
4 School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK
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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.