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astro-ph2004
On gravito-magnetic time delay by extended lenses
M. Sereno
Gravitational lensing by rotating extended deflectors is discussed. Due to spin, corrections on image positions, caustics and critical curves can be significant. In order to obtain…
astro-ph2004
Constraints on a quintessence model from gravitational lensing statistics
M. Sereno
Constraints on an exact quintessence scalar-field model with an exponential potential are derived from gravitational lens statistics. An exponential potential can account for data…
astro-ph2003
Gravitational lensing by stars with angular momentum
M. Sereno
Gravitational lensing by spinning stars, approximated as homogeneous spheres, is discussed in the weak field limit. Dragging of inertial frames, induced by angular momentum of the…