Higher-order corrections to lensing parameters for extended gravitational lenses

Citation
S. Capozziello et V. Re, Higher-order corrections to lensing parameters for extended gravitational lenses, PHYS LETT A, 290(3-4), 2001, pp. 115-119
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
290
Issue
3-4
Year of publication
2001
Pages
115 - 119
Database
ISI
SICI code
0375-9601(20011112)290:3-4<115:HCTLPF>2.0.ZU;2-V
Abstract
We discuss the contribution to the characteristic lensing quantities. i.e., the deflection angle and Einstein radius, due to the higher-order terms (e .g., the gravitomagnetic terms) considered in the lens potential. The cases we analyze are the singular isothermal sphere and the disk of spiral galax ies. It is possible to see that the perturbative effects could be of the or der 10(-3) with respect to the ordinary terms of weak field and thin lens a pproximations, so that it is not a far hypothesis to obtain evidences of th em in a next future by suitable experiments. (C) 2001 Elsevier Science B.V. All rights reserved.