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HST Observations of Gravitationally Lensed QSOs
Claeskens, Jean-François; Sluse, Dominique; Surdej, Jean
2010In Macchetto, D. F. (Ed.) The Impact of HST on European Astronomy
 

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Keywords :
gravitational lensing
Abstract :
[en] Thanks to its sharp view, HST has significantly improved our knowledge of tens of gravitationally lensed quasars in four different respects: (1) confirming their lensed nature; (2) detecting the lensing galaxy responsible for the image splitting; (3) improving the astrometric accuracy on the positions of the unresolved QSO images and of the lens; (4) resolving extended lensed structures from the QSO hosts into faint NIR or optical rings or arcs. These observations have helped to break some degeneracies on the lens potential, to probe the galaxy evolution and to reconstruct the true shape of the QSO host with an increased angular resolution.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Claeskens, Jean-François ;  Institut d’Astrophysique et de Géophysique, Université de Liège
Sluse, Dominique  ;  Laboratoire d’Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL) Observatoire
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
HST Observations of Gravitationally Lensed QSOs
Publication date :
2010
Main work title :
The Impact of HST on European Astronomy
Editor :
Macchetto, D. F.
Collection name :
Astrophysics and Space Science Proceedings, 2010, Part 3, 191-195
Pages :
191-195
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