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23 April 2024

» arxiv » 0809.4295

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HAT-P-10b: A light and moderately hot Jupiter transiting a K dwarf
G. A. Bakos ; A. Pal ; G. Torres ; B. Sipocz ; D. W. Latham ; R. W. Noyes ; Geza Kovacs ; J. Hartman ; G. A. Esquerdo ; D. A. Fischer ; J. A. Johnson ; G. W. Marcy ; R. P. Butler ; A. Howard ; D. D. Sasselov ; Gabor Kovacs ; R. P. Stefanik ; J. Lazar ; I. Papp ; P. Sari ;
Date:	25 Sep 2008
Abstract:	We report on the discovery of HAT-P-10b, the lowest mass (0.46 +/- 0.03 MJ) transiting extrasolar planet (TEP) discovered to date by transit searches. HAT-P-10b orbits the moderately bright V=11.89 K dwarf GSC 02340-01714, with a period P = 3.7224690 +/- 0.0000067 d, transit epoch Tc = 2454729.90631 +/- 0.00030 (BJD) and duration 0.1100 +/- 0.0015 d. HAT-P-10b has a radius of 1.05 +(0.05)-(0.03) RJ yielding a mean density of 0.498+/-0.064 g cm^-3 . Comparing these observations with recent theoretical models we find that HAT-P-10 is consistent with a ~4.5 Gyr, coreless, pure hydrogen and helium gas giant planet. With an equilibrium temperature of Teq = 1030 +(26)-(19)K, HAT-P-10b is one of the coldest TEPs. Curiously, its Safronov number Theta = 0.047 +/- 0.003 falls close to the dividing line between the two suggested TEP populations.
Source:	arXiv, 0809.4295
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