Search For Transits Of RV Discovered Planets In The Stereo Data

Details Search For Transits Of RV Discovered Planets In The Stereo Data Search For Transits Of RV Discovered Planets In The Stereo Data

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.1912t&link_type=abstract

American Astronomical Society, ESS meeting #2, #19.12

Mathematics

Probability

Scientific paper

We describe an application of the photometric time series extracted from the existing data from one of the instruments on the currently operating space mission STEREO to search for transiting exoplanets.
STEREO is a mission in NASA’s Solar Terrestrial Probes program and uses two nearly identical spacecrafts to map coronal mass ejections as they propagate away from the Sun. In addition to observing the heliosphere STEREO also observes the background star field. The continuous series of images obtained by the Heliospheric Imager 1 (HI-1) cameras on the two STEREO spacecrafts are well suited for the search for transiting exoplanets with bright host stars.
There are approximately 50 RV-discovered planets in the STEREO field with periods ranging from a few days to several thousand days. This poster will present analysis of the existing data for all of these stars, which consists of up to ten 20-day windows of contiguous coverage of 40 min cadence. The STEREO data provide full coverage for transiting planets with periods up to 20 days and down to a certain radius, dependent on the brightness of the star. We will discuss the limitations in each individual case. In many cases, for the very bright host stars in particular, the transits of even super-Earths could be detected. In addition we will search for transits at the RV established periods. Special attention will be paid to planets with significant eccentricity because of the greatly increased probability of transit. For many of the host stars, the STEREO data provide the most precise photometric time series available; we will quantify the intrinsic variability of those stars in addition to searching for transits.

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