Galactic microlensing with rotating binaries
Abstract
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 earth's motion 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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1998
- DOI:
- 10.48550/arXiv.astro-ph/9702039
- arXiv:
- arXiv:astro-ph/9702039
- Bibcode:
- 1998A&A...329..361D
- Keywords:
-
- GRAVITATIONAL LENSING;
- DARK MATTER;
- BINARIES: GENERAL;
- STARS: LOW-MASS;
- BROWN DWARFS;
- PLANETARY SYSTEMS;
- Astrophysics
- E-Print:
- 22 pages LaTeX2e format including 18 PostScript figures, uses "aa.cls"