lec04_10oct2007

lec04_10oct2007 - What can transit observations tell us...

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Ge/Ay133 What can transit observations tell us about (exo)-planetary science?
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Sometimes the absence of signal is interesting: No transits in 47 Tuc, `expectation’=30-40 (34,000 stars) Gilliland, R.L. et al. 2000, ApJ, 545, L47
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Transits, approach #1: Search for transits in systems known to have planets at the doppler crossings. Sato, B. et al. 2005, ApJ, astro-ph/0507009
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Photometry is fairly straightforward: Amateur observations of HD 209458 b Bruce L. Gary, Santa Barbara, CA Arto Oksanen SBIG cameras, Meade telescopes, V filters
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Transits, approach #2: Search for transits in many stars using a suite of low cost robotic telescopes. TrES-1 Alonso, R. et al. 2004, ApJ, 613, L153
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Photometry from space can be extremely good: HD 209458 - HST The KEPLER mission is dedicated to photometry and can search for earth mass planets in the so- called habitable zone. Brown, T.M. et al. 2001, ApJ, 552, 699 www.kepler.arc.nasa.gov
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Transits and the Rossiter-McLaughlin effect (1924): Winn, J.N. et al. 2005, ApJ, 631, 1215
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A comparison of transiting planet systems: Remember, size is not a strong function of mass, so very accurate measurements are needed!
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HD 149026
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This note was uploaded on 01/03/2012 for the course GEL 133 taught by Professor List during the Fall '10 term at Caltech.

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lec04_10oct2007 - What can transit observations tell us...

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