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Published December 10, 2008 | Published
Journal Article Open

Constraining orbital parameters through planetary transit monitoring

Abstract

The orbital parameters of extrasolar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD 17156b, whose favorable eccentricity and argument of periastron dramatically increased its transit likelihood. We present a study which provides a quantitative analysis of how these two orbital parameters affect the geometric transit probability as a function of period. Furthermore, we apply these results to known radial velocity planets and show that there are unexpectedly high transit probabilities for planets at relatively long periods. For a photometric monitoring campaign which aims to determine whether the planet indeed transits, we calculate the expected transiting planet yield and the significance of a potential null result, as well as the subsequent constraints that may be applied to orbital parameters.

Additional Information

© 2008 The American Astronomical Society. Received 2008 June 24; accepted 2008 August 8. Print publication: Issue 1 (2008 December 10). The authors would like to thank David Ciardi, Scott Fleming, and Alan Payne for several useful discussions. We would especially like to thank the referee, Jason W. Barnes, who provided a fast and insightful report which greatly improved the quality of the paper.

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August 22, 2023
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