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
Referencia bibliográfica
The Astrophysical Journal, Volume 691, Issue 2, pp. 1145-1158 (2009).
Fecha de publicación:
2
2009
Revista
Número de citas
97
Número de citas referidas
88
Descripción
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.
Proyectos relacionados
Sismología Solar y Estelar y Búsqueda de Exoplanetas
Los objetivos genéricos de este Proyecto son: 1) el estudio de la estructura y dinámica del interior solar, 2) la extensión de dicho estudio al caso de otras estrellas, 3) la búsqueda y caracterización de planetas extrasolares por métodos fotométricos (principalmente mediante el método de tránsitos) y espectroscópico (variaciones en la velocidad
Savita
Mathur