TY - GEN

T1 - Constraints on extrasolar planet populations from VLT NACO/SDI and MMT SDI and direct adaptive optics imaging surveys

T2 - Physics and Astrophysics of Planetary Systems

AU - Nielsen, E. L.

AU - Close, L. M.

AU - Biller, B. A.

AU - Masciadri, E.

AU - Lenzen, R.

PY - 2010

Y1 - 2010

N2 - We examine the implications for the distribution of extrasolar planets based on the null results from two of the largest direct imaging surveys published to date. Combining the measured contrast curves from Masciadri et al. (2005) and Biller et al. (2007), we consider what distributions of planet masses and semi-major axes can be ruled out by these data, based on Monte Carlo simulations of planet populations. We can set the following upper limit with 95% confidence: the fraction of stars with planets with semi-major axis between 20 and 100 AU, and mass above 4,M Jup , is 20% or less. Also, with a distribution of planet mass of frac in the range of 0.5-13 MJup, we can rule out a power-law distribution for semi-major axis with index 0 and upper cut-off of 18 AU, and index -0.5 with an upper cut-off of 48 AU. For the distribution suggested by Cumming et al. (2008), a power-law of index -0.61, we can place an upper limit of 75 AU on the semi-major axis distribution.

AB - We examine the implications for the distribution of extrasolar planets based on the null results from two of the largest direct imaging surveys published to date. Combining the measured contrast curves from Masciadri et al. (2005) and Biller et al. (2007), we consider what distributions of planet masses and semi-major axes can be ruled out by these data, based on Monte Carlo simulations of planet populations. We can set the following upper limit with 95% confidence: the fraction of stars with planets with semi-major axis between 20 and 100 AU, and mass above 4,M Jup , is 20% or less. Also, with a distribution of planet mass of frac in the range of 0.5-13 MJup, we can rule out a power-law distribution for semi-major axis with index 0 and upper cut-off of 18 AU, and index -0.5 with an upper cut-off of 48 AU. For the distribution suggested by Cumming et al. (2008), a power-law of index -0.61, we can place an upper limit of 75 AU on the semi-major axis distribution.

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U2 - 10.1051/eas/1041008

DO - 10.1051/eas/1041008

M3 - Conference contribution

AN - SCOPUS:84874357955

SN - 9782759804900

T3 - EAS Publications Series

SP - 107

EP - 110

BT - Physics and Astrophysics of Planetary Systems

Y2 - 18 February 2008 through 29 February 2008

ER -