Light on dark lenses

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Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998newar..42...97j&link_type=abstract

New Astronomy Reviews, Volume 42, Issue 2, p. 97-100.

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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