Expected Planet and False Positive Detection Rates for the Transiting Exoplanet Survey Satellite

Details Expected Planet and False Positive Detection Rates for the Transiting Exoplanet Survey Satellite Expected Planet and False Positive Detection Rates for the Transiting Exoplanet Survey Satellite

2008-12-07

arxiv.org/abs/0812.1305v1

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures. Submitted to PASP. Replacement adds acknowledgments, fixes typos

Scientific paper

The proposed Transiting Exoplanet Survey Satellite (TESS) will survey the entire sky to locate the nearest and brightest transiting extrasolar planets with orbital periods up to about 36 days. Here we estimate the number and kind of astrophysical false positives that TESS will report, along with the number of extrasolar planets. These estimates are then used to size the ground-based follow-up observing efforts needed to confirm and characterize the planets. We estimate that the needed observing resources will be about 1400 telescope-nights of imaging with 0.5m to 1m-class telescopes, 300 telescope-nights with 1m to 2m-class telescopes for the classification of the host stars and for radial velocity measurements with roughly 1 km/s precision, and 380 telescope-nights with 2m to 4m-class telescopes for radial velocity studies with precision of a few m/s. Follow-up spectroscopy of the smallest planets discovered by TESS at the best possible velocity precision will be limited by the number of telescope nights available on 4m to 10m class telescopes with instruments such as HARPS and HIRES, but the pay-off of such efforts will be the determination of masses for Super Earths with sufficient accuracy to distinguish rocky desert planets from water worlds.

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