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 gravito-magnetic terms) considered in the lens potential. The cases we analyze are the singular isothermal sphere and the disk of spiral galaxies. It is possible to see that the perturbative effects could be of the order 10-3 with respect to the ordinary terms of weak field and thin lens approximations. In both cases, the proper motions (i.e. the velocity dispersion and the circular velocity) have to be taken into account and, in some peculiar cases (e.g. AGN, or other kinds of extreme active galaxies) their contributions could be far to be trivially ignored.
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Capozziello, S., Re, V. Higher Order Corrections to Lensing Parameters for Extended Gravitational Lenses. In: Shaver, P.A., DiLella, L., Giménez, A. (eds) Astronomy, Cosmology and Fundamental Physics. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10857580_36
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DOI: https://doi.org/10.1007/10857580_36
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-40179-7
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