A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4

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A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4

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Title: A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4
Author: Sozzetti, Alessandro; Torres, Guillermo; Charbonneau, David; Winn, Joshua N.; Korzennik, Sylvain G.; Holman, Matthew J.; Latham, David W.; Laird, John B.; Fernandez, Jose; O'Donovan, Francis T.; Mandushev, Georgi; Dunham, Edward; Everett, Mark E.; Esquerdo, Gilbert A.; Rabus, Markus; Belmonte, Juan A.; Deeg, Hans J.; Brown, Timothy N.; Hidas, Marton G.; Baliber, Nairn

Note: Order does not necessarily reflect citation order of authors.

Citation: Sozzetti, Alessandro, Guillermo Torres, David Charbonneau, Joshua N. Winn, Sylvain G. Korzennik, Matthew J. Holman, David W. Latham, et al. 2009. A new spectroscopic and photometric analysis of the transiting planet systems TrES-3 and TrES-4. Astrophysical Journal 691(2): 1145-1158.
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Abstract: We report new spectroscopic and photometric observations of the parent stars of the recently discovered transiting planets TrES-3 and TrES-4. A detailed abundance analysis based on high-resolution spectra yields [Fe/H] = –0.19 ± 0.08, T eff = 5650 ± 75 K, and log g = 4.4 ± 0.1 for TrES-3, and [Fe/H] = +0.14 ± 0.09, T eff = 6200 ± 75 K, and log g = 4.0 ± 0.1 for TrES-4. The accuracy of the effective temperatures is supported by a number of independent consistency checks. The spectroscopic orbital solution for TrES-3 is improved with our new radial velocity measurements of that system, as are the light-curve parameters for both systems based on newly acquired photometry for TrES-3 and a reanalysis of existing photometry for TrES-4. We have redetermined the stellar parameters taking advantage of the strong constraint provided by the light curves in the form of the normalized separation a/R sstarf (related to the stellar density) in conjunction with our new temperatures and metallicities. The masses and radii we derive are M sstarf = 0.928+0.028 –0.048 M sun, R sstarf = 0.829+0.015 –0.022 R sun, and M sstarf = 1.404+0.066 –0.134 M sun, R sstarf = 1.846+0.096 –0.087 R sun for TrES-3 and TrES-4, respectively. With these revised stellar parameters, we obtain improved values for the planetary masses and radii. We find Mp = 1.910+0.075 –0.080 M Jup, Rp = 1.336+0.031 –0.036 R Jup for TrES-3, and Mp = 0.925 ± 0.082 M Jup, Rp = 1.783+0.093 –0.086 R Jup for TrES-4. We confirm TrES-4 as the planet with the largest radius among the currently known transiting hot Jupiters.
Published Version: doi:10.1088/0004-637X/691/2/1145
Other Sources: http://authors.library.caltech.edu/15848/
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4341697
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