Asymmetry in Microlensing-Induced Light Curves

Details Asymmetry in Microlensing-Induced Light Curves Asymmetry in Microlensing-Induced Light Curves

1999-02-28

arxiv.org/abs/astro-ph/9903006v1

Prog.Theor.Phys. 101 (1999) 885-901

Astronomy and Astrophysics

Astrophysics

18 pages, 17 eps figures, Accepted for publication in Prog. Theor. Phys

Scientific paper

10.1143/PTP.101.885

We discuss distortion in microlensing-induced light curves which are considered to be curves due to single-point-mass lenses at a first glance. As factors of the distortion, we consider close binary and planetary systems, which are the limiting cases of two-point-mass lenses, and the gravitational potential is regarded as the sum of the single point mass and the corrections. In order to quantitatively estimate the asymmetric features of such distorted light curves, we propose a cutoff dependent skewness, and show how to discriminate the similar light curves with it. We also examine as the distortion the general relativistic effect of frame dragging, but the effect coincides with the close binary case in the light curves.

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