TY - JOUR
T1 - The hot-Jupiter Kepler-17b
T2 - Discovery, obliquity from stroboscopic starspots, and atmospheric characterization
AU - Désert, Jean Michel
AU - Charbonneau, David
AU - Demory, Brice Olivier
AU - Ballard, Sarah
AU - Carter, Joshua A.
AU - Fortney, Jonathan J.
AU - Cochran, William D.
AU - Endl, Michael
AU - Quinn, Samuel N.
AU - Isaacson, Howard T.
AU - Fressin, François
AU - Buchhave, Lars A.
AU - Latham, David W.
AU - Knutson, Heather A.
AU - Bryson, Stephen T.
AU - Torres, Guillermo
AU - Rowe, Jason F.
AU - Batalha, Natalie M.
AU - Borucki, William J.
AU - Brown, Timothy M.
AU - Caldwell, Douglas A.
AU - Christiansen, Jessie L.
AU - Deming, Drake
AU - Fabrycky, Daniel C.
AU - Ford, Eric B.
AU - Gilliland, Ronald L.
AU - Gillon, Michal
AU - Haas, Michal R.
AU - Jenkins, Jon M.
AU - Kinemuchi, Karen
AU - Koch, David
AU - Lissauer, Jack J.
AU - Lucas, Philip
AU - Mullally, Fergal
AU - MacQueen, Phillip J.
AU - Marcy, Geoffrey W.
AU - Sasselov, Dimitar D.
AU - Seager, Sara
AU - Still, Martin
AU - Tenenbaum, Peter
AU - Uddin, Kamal
AU - Winn, Joshua N.
PY - 2011/11
Y1 - 2011/11
N2 - This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show a Doppler signal of 419.5+13.3 -15.6 m s-1. From a transit-based estimate of the host star's mean density, combined with an estimate of the stellar effective temperature Teff = 5630 ± 100 from high-resolution spectra, we infer a stellar host mass of 1.06 ± 0.07 M ⊙ and a stellar radius of 1.02 ± 0.03R ⊙. We estimate the planet mass and radius to be M P = 2.45 0.11 M J and RP = 1.31 ± 0.02R J. The host star is active, with dark spots that are frequently occulted by the planet. The continuous monitoring of the star reveals a stellar rotation period of 11.89 days, eight times the planet's orbital period; this period ratio produces stroboscopic effects on the occulted starspots. The temporal pattern of these spot-crossing events shows that the planet's orbit is prograde and the star's obliquity is smaller than 15°. We detected planetary occultations of Kepler-17b with both the Kepler and Spitzer Space Telescopes. We use these observations to constrain the eccentricity, e, and find that it is consistent with a circular orbit (e < 0.011). The brightness temperatures of the planet's infrared bandpasses are = 1880 ± 100 K and = 1770 ± 150 K. We measure the optical geometric albedo Ag in the Kepler bandpass and find Ag = 0.10 ± 0.02. The observations are best described by atmospheric models for which most of the incident energy is re-radiated away from the day side.
AB - This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-Eberly Telescope show a Doppler signal of 419.5+13.3 -15.6 m s-1. From a transit-based estimate of the host star's mean density, combined with an estimate of the stellar effective temperature Teff = 5630 ± 100 from high-resolution spectra, we infer a stellar host mass of 1.06 ± 0.07 M ⊙ and a stellar radius of 1.02 ± 0.03R ⊙. We estimate the planet mass and radius to be M P = 2.45 0.11 M J and RP = 1.31 ± 0.02R J. The host star is active, with dark spots that are frequently occulted by the planet. The continuous monitoring of the star reveals a stellar rotation period of 11.89 days, eight times the planet's orbital period; this period ratio produces stroboscopic effects on the occulted starspots. The temporal pattern of these spot-crossing events shows that the planet's orbit is prograde and the star's obliquity is smaller than 15°. We detected planetary occultations of Kepler-17b with both the Kepler and Spitzer Space Telescopes. We use these observations to constrain the eccentricity, e, and find that it is consistent with a circular orbit (e < 0.011). The brightness temperatures of the planet's infrared bandpasses are = 1880 ± 100 K and = 1770 ± 150 K. We measure the optical geometric albedo Ag in the Kepler bandpass and find Ag = 0.10 ± 0.02. The observations are best described by atmospheric models for which most of the incident energy is re-radiated away from the day side.
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U2 - 10.1088/0067-0049/197/1/14
DO - 10.1088/0067-0049/197/1/14
M3 - Article
AN - SCOPUS:80655127961
SN - 0067-0049
VL - 197
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
IS - 1
M1 - 14
ER -