A Uniform Analysis of 118 Sun-like Stars with High-Contrast Adaptive Optics Imaging: Long Period Giant Planets are Rare

Details A Uniform Analysis of 118 Sun-like Stars with High-Contrast Adaptive Optics Imaging: Long Period Giant Planets are Rare A Uniform Analysis of 118 Sun-like Stars with High-Contrast Adaptive Optics Imaging: Long Period Giant Planets are Rare

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21423004n&link_type=abstract

American Astronomical Society, AAS Meeting #214, #230.04; Bulletin of the American Astronomical Society, Vol. 41, p.734

Astronomy and Astrophysics

Astronomy

Scientific paper

We expand on the results of Nielsen et al. 2008, using the null result for giant extrasolar planets around the 118 target stars from the VLT NACO H and Ks planet search (Masciadri et al. 2005), the VLT and MMT Simultaneous Differential Imaging (SDI) survey (Biller et al. 2007), and the Gemini Deep Planet Survey (Lafrieniere et al. 2007) to set constraints on the population of giant exoplanets. Our analysis is extended to include the planet luminosity models of Fortney et al. 2008, as well as the correlation between stellar mass and frequency of giant planets found by Johnson et al. 2007. Doubling the sample size strengthens our conclusions: a model for extrasolar giant planets with power-laws for mass and semi-major axis as giving by Cumming et al. 2008 cannot, with 95% confidence, have planets beyond 47 AU, compared to the value of 75 AU reported in Nielsen et al. 2008, using the models of Burrows et al. 2003. When the Johnson et al. 2007 correction for stellar mass (which gives fewer Jupiter-mass companions to M stars with respect to solar-type stars) is applied, however, this limit moves out to 65 AU. For the relatively new Fortney et al. 2008 models, which predict fainter planets across most of parameter space, these upper limits, with and without a correction for stellar mass, are 100 and 124 AU, respectively.

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