Physics
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997azh....74..559k&link_type=abstract
Astronomicheskij Zhurnal, vol. 74, p. 559
Physics
1
Binary Stars, Gravitational Lenses, Light Curve, Galactic Halos, Stellar Rotation, Stellar Physics, Dark Matter, Magellanic Clouds, Stellar Systems, Galactic Bulge
Scientific paper
A method is described for calculating the light curve for a physical stellar binary system microlensed by a dark body in the Galactic halo, taking into account tidal-rotational deformation of the stars, their mutual heating, limb darkening, and gravitational darkening. Model light curves are calculated for the cases of point and extended gravitational lenses and binary systems located in the Large Magellanic Cloud and in the Galactic bulge. The binarity of the stellar system is clearly observable for some combinations of the system parameters, especially for binaries in the Galactic bulge. In many cases, the microlensing curves for a binary with stars with nonzero angular sizes differ from those for a system of two point sources. The prospects for studying microlensing of binary background stars in order to reveal differences between compact and extended gravitational lenses are discussed.
Cherepashchuk Anatol M.
Khruzina T. S.
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