Can We See a Rotating Gravitational Lens?
Author(s) -
Hideki Asada,
M. Kasai
Publication year - 2000
Publication title -
progress of theoretical physics
Language(s) - English
Resource type - Journals
eISSN - 1347-4081
pISSN - 0033-068X
DOI - 10.1143/ptp.104.95
Subject(s) - physics , gravitational lens , lens (geology) , quadrupole , deflection (physics) , deflection angle , rotation (mathematics) , gravitation , classical mechanics , optics , astrophysics , quantum mechanics , galaxy , geometry , mathematics , redshift
It is known that the rotation of a gravitational lens affects properties ofimages. We consider an inverse problem: If the lens is dark, can we infer itsrotation from the observed images? We find that, up to the first order in thegravitational constant G, a rotating lens is not distinguishable from anon-rotating one. The quadrupole contribution to the deflection angle is alsocalculated for a general, extended lens object.Comment: 8 pages (PTPTeX); accepted for publication in Prog. Theor. Phy
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