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Wide Separation Lenses

Published online by Cambridge University Press:  25 May 2016

D. J. Mortlock ,
R. L. Webster  and
P. C. Hewett
D. J. Mortlock
Affiliation:
University of Melbourne, Parkville, Victoria, 3052, Australia
R. L. Webster
Affiliation:
University of Melbourne, Parkville, Victoria, 3052, Australia
P. C. Hewett
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK

Extract

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There is still debate as to whether wide separation (Δθ ≳ 3″) double quasars are physical binaries or gravitationally lensed sources. We proceed under the assumption that most of these objects are the result of lensing, and use maximum likelihood techniques (Kochanek 1993) to infer information about the mass distribution of deflectors that would be required to produce these wide image separations. Under the above assumptions, the most consistent explanation is the existence of a significant population of dark objects with the mass of groups of galaxies.

Type
Chapter 3: Large Scale Structure
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 71 - 72
Copyright
Copyright © Kluwer 1996 

References

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