Journal Article

Gravitational lenses and lens candidates identified from the COSMOS field

Neal Jackson

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 389, issue 3, pages 1311-1318
Published in print September 2008 | ISSN: 0035-8711
Published online September 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13629.x
Gravitational lenses and lens candidates identified from the COSMOS field

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A complete manual search has been carried out of the list of 285 423 objects, nearly all of them galaxies, identified in the Cosmic Evolution Survey (COSMOS) field that are brighter than I= 25. Two certain and one highly probable new gravitational lenses are found, in addition to the lenses and candidate lens systems previously found by Faure et al. A further list of 112 candidate lens systems is presented. Few of these are likely to be true gravitational lens systems, most being star-forming rings or pairs of companion galaxies. It is possible to examine of order 106 objects by eye in a reasonable time, although reliable detection of lenses by such methods is likely to be possible only with high-resolution data. The loss of completeness involved in a rapid search is estimated as up to a factor of 2, depending on the morphology of the lens candidate.

Keywords: gravitational lensing; galaxies: individual: COSMOS J100140.12+020040.9; galaxies: individual: COSMOS J095930.94+023427.7; galaxies: individual: COSMOS J100126.02+013714.5

Journal Article.  4084 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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