Galactic microlensing with rotating binaries

Details Galactic microlensing with rotating binaries Galactic microlensing with rotating binaries

1997-02-04

arxiv.org/abs/astro-ph/9702039v2

Astron.Astrophys. 329 (1998) 361

Astronomy and Astrophysics

Astrophysics

22 pages LaTeX2e format including 18 PostScript figures, uses "aa.cls"

Scientific paper

The influence of rotating binary systems on the light curves of galactic microlensing events is studied. Three different rotating binary systems are discussed: a rotating binary lens, a rotating binary source, and the motion of the earth around the sun (parallax effect). The most dramatic effects arise from the motion of a binary lens because of the changes of the caustic structure with time. I discuss when the treatment of a microlensing event with a static binary model is appropriate. It is shown that additional constraints on the unknown physical quantities of the lens system arise from a fit with a rotating binary lens as well as from the earth-around-sun motion. For the DUO#2 event, a fit with a rotating binary lens is presented.

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