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Light on dark lenses
Jackson, N.; Helbig, Phillip; Browne, I. W. A. et al.
1998In New Astronomy Reviews, 42 (2), p. 97-100
 

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Abstract :
[en] We present an update of the status of the Cosmic Lens All-Sky Survey (CLASS). Twelve lenses have been found to date in CLASS together with the earlier Jodrell Bank-VLA Astrometric Survey (JVAS). Six other sources are under investigation as possible lenses. To date, all lens systems studied optically have been shown to have associated lensing galaxies to a limiting I magnitude of 23-24. These observations place severe constraints on published claims that dark ( M/L > 100 ) galaxies form a significant fraction of the general population of galaxies.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Jackson, N.;  NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Helbig, Phillip  ;  NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Browne, I. W. A.;  NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Koopmans, L.;  Kapteyn Astronomical Institute, University of Groningen, Netherlands)
Language :
English
Title :
Light on dark lenses
Publication date :
01 August 1998
Event name :
Gravitational Lensing: Nature's Own Weighing Scales
Event date :
January 1998
Audience :
International
Journal title :
New Astronomy Reviews
ISSN :
1387-6473
Publisher :
Elsevier, Netherlands
Volume :
42
Issue :
2
Pages :
97-100
Name of the research project :
TMR Program, Research Contract ERBFMRXCT960034 'CERES'
Funders :
EU - European Commission
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