COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. IV. Models of prospective time-delay lenses

[en] 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 H_0.<BR /> 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 H_0[SUP]-1[/SUP]=14 Gyr (H_0=70 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 H[SUB]0[/SUB] can be recovered to a precision of 5%.<BR /> 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.<BR />

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Saha, P.; Astronomy Unit, Queen Mary and Westfield College, University of London, London E1 4NS, UK ; Institut für Theoretische Physik, Universität Zürich, Winterthurerstr. 190, 8057 Zürich, Switzerland

Courbin, F.; Laboratoire d'Astrophysique, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire, 1290 Sauverny, Switzerland

Sluse, Dominique ; Ecole Polytechnique Fédérale de Lausanne - EPFL > LASTRO

Dye, S.; School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3YB, UK

Meylan, G.; Laboratoire d'Astrophysique, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire, 1290 Sauverny, Switzerland)

Language :

English

Title :

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. IV. Models of prospective time-delay lenses

Publication date :

01 May 2006

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

450

Pages :

461-469

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://esoads.eso.org/abs/2006A%26A...450..461S

Available on ORBi :

since 07 January 2015

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