Self-Lensing By Binaries

Details Self-Lensing By Binaries Self-Lensing By Binaries

1994-09-22

arxiv.org/abs/astro-ph/9409057v1

Astrophys.J. 446 (1995) 541

Astronomy and Astrophysics

Astrophysics

8 pages, no figures, PostScript file, or request PostScript file to gould@payne.mps.ohio-state.edu, OSU-TA-20/94

Scientific paper

10.1086/175812

Lensing of one member of a binary by its companion is studied for several classes of binaries. For binaries in which at least one member is an ordinary (non-compact) star, the optical depths to lensing is extremely low, $\tau\lsim v_\esc^4/c^4\sim 10^{-11}$. Here $v_\esc$ is the escape velocity from the component with the weaker potential. Binaries composed of two compact objects can have higher optical depths. About 0.2\% of millisecond pulsar binaries will be self-lensing. Such objects can be used to probe the pulsar-emission mechanism.

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