Methods for exomoon characterization: combining transit photometry and the Rossiter-McLaughlin effect

Details Methods for exomoon characterization: combining transit photometry and the Rossiter-McLaughlin effect Methods for exomoon characterization: combining transit photometry and the Rossiter-McLaughlin effect

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.406.2038s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 406, Issue 3, pp. 2038-2046.

Astronomy and Astrophysics

Astronomy

6

Methods: Numerical, Techniques: Photometric, Techniques: Radial Velocities, Planets And Satellites: Detection, Planetary Systems

Scientific paper

It has been suggested that moons around transiting exoplanets may cause an observable signal in transit photometry or in the Rossiter-McLaughlin (RM) effect. In this paper, a detailed analysis of parameter reconstruction from the RM effect is presented for various planet-moon configurations, described with 20 parameters. We also demonstrate the benefits of combining photometry with the RM effect. We simulated 2.7 × 109 configurations of a generic transiting system to map the confidence region of the parameters of the moon, find the correlated parameters and determine the validity of reconstructions. The main conclusion is that the strictest constraints from the RM effect are expected for the radius of the moon. In some cases, there is also meaningful information on its orbital period. When the transit time of the moon is exactly known, for example from transit photometry, the angle parameters of the moon's orbit will also be constrained from the RM effect. From transit light curves the mass can be determined, and combining this result with the radius from the RM effect, the experimental determination of the density of the moon is also possible.

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