lec03_01oct2010

lec03_01oct2010 - What have radial velocity surveys told us...

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Ge/Ay133 What have radial velocity surveys told us about (exo)-planetary science?
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Discovery space for indirect methods: Radial velocity Astrometry ( r =distance to the star)
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Mayor, M. & Queloz, D. 1995, Nature, 378, 355
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Udry, S. et al. 2002, A&A, 390, 26
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Jovian planets througout the 0.05-5 AU region. And… Updated plots follow.
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No strong preference for orbital distances… …except for a “pile up” of hot Jupiters at P~3 days.
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Planetary characteristics? Some trend in M versus R (bias?), but beyond 0.05-0.1 AU, little preference for low eccentricities:
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Eccentricities. II. Short Period Circularization
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Even with incompleteness, strong preference for ~Jovian mass:
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Stars are different, turnover at low mass! “The brown dwarf desert”? Does this tell us that stars and planets form differently? Orion IMF
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Is there an eccentricity preference w/mass? Not really… Marcy, G. et al. 2005, astro-ph/0505003
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Is there an eccentricity preference w/mass? Not really, part II… Butler, R.P. et al. 2006, ApJ, 646, 505 ?
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correlates strongly with metallicity! Fischer, D.A. & Valenti, J. 2005, ApJ, 622, 1102
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lec03_01oct2010 - What have radial velocity surveys told us...

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