A nonsingular model for a gravitational microlens

Details A nonsingular model for a gravitational microlens A nonsingular model for a gravitational microlens

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..325z&link_type=abstract

Astronomy Reports, Volume 43, Issue 5, May 1999, pp.325-329

Astronomy and Astrophysics

Astronomy

9

Scientific paper

The microlensing of distant stars by noncompact objects, such as neutralino stars, is considered. The mass density distribution in the microlens is assumed to have no singularity at the coordinate origin (like the mass distribution in a nonsingular isothermal sphere, or in an isothermal sphere with a core). A detailed analysis of the gravitational-lens equation is presented, its analytical solutions are obtained, and an expression for amplification by the gravitational lens is derived. It is shown that microlensing events with two characteristic maxima in their light curves, which are usually accounted for by the action of a double compact microlens, can be explained by the proposed model.

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