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Centro de Astrofísica da Universidade do Porto

Probing the effect of gravitational microlensing on the measurements of the Rossiter-McLaughlin effect

M. Oshagh, G. Boué, P. Figueira, N. C. Santos, N. Haghighipour

Abstract
In general, in the studies of transit light-curves and the Rossiter-McLaughlin (RM), the contribution of the planet’s gravitational microlensing is neglected. Theoretical studies, have, however shown that the planet’s microlensing can affect the transit lightcurve and in some extreme cases cause the transit depth to vanish. In this letter, we present the results of our quantitative analysis of microlening on the RM effect. Results indicate that for massive planets in on long period orbits, the planet’s microlensing will have considerable contribution to the star’s RV measurements. We present the details of our study, and discuss our analysis and results.

Keywords
planetary systems – techniques: spectroscopic – gravitational lensing: micro – methods: numerical

Astronomy and Astrophysics
Volume 558, Page A65_1
October 2013

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