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Gravitational lensing by a smoothly variable surface mass densityThe statistical properties of gravitational lensing due to smooth but nonuniform distributions of matter are considered. It is found that a majority of triple images had a parity characteristic for 'shear-induced' lensing. Almost all cases of triple or multiple imaging were associated with large surface density enhancements, and lensing objects were present between the images. Thus, the observed gravitational lens candidates for which no lensing object has been detected between the images are unlikely to be a result of asymmetric distribution of mass external to the image circle. In a model with smoothly variable surface mass density, moderately and highly amplified images tended to be single rather than multiple. An opposite trend was found in models which had singularities in the surface mass distribution.
Document ID
19890042500
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Paczynski, Bohdan
(Princeton Univ. Observatory NJ, United States)
Wambsganss, Joachim
(Princeton University Observatory, NJ, United States)
Date Acquired
August 14, 2013
Publication Date
February 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 337
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A29871
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-19552
CONTRACT_GRANT: NAGW-765
Distribution Limits
Public
Copyright
Other

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