Bibcode
Sozzetti, Alessandro; Torres, Guillermo; Charbonneau, David; Winn, Joshua N.; Korzennik, Sylvain G.; Holman, Matthew J.; Latham, David W.; Laird, John B.; Fernandez, José; 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, Márton G.; Baliber, Nairn
Bibliographical reference
The Astrophysical Journal, Volume 691, Issue 2, pp. 1145-1158 (2009).
Advertised on:
2
2009
Journal
Citations
97
Refereed citations
88
Description
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.
Related projects
Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur