2012ApJ...761...53B


Query : 2012ApJ...761...53B

2012ApJ...761...53B - Astrophys. J., 761, 53 (2012/December-2)

Photometrically derived masses and radii of the planet and star in the TrES-2 system.

BARCLAY T., HUBER D., ROWE J.F., FORTNEY J.J., MORLEY C.V., QUINTANA E.V., FABRYCKY D.C., BARENTSEN G., BLOEMEN S., CHRISTIANSEN J.L., DEMORY B.-O., FULTON B.J., JENKINS J.M., MULLALLY F., RAGOZZINE D., SEADER S.E., SHPORER A., TENENBAUM P. and THOMPSON S.E.

Abstract (from CDS):

We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period consistent with the orbital period of the planet with amplitudes of 2.79+0.44–0.62 and 3.44+0.32–0.37parts per million (ppm), respectively, and a difference between the dayside and the nightside planetary flux of 3.41+0.55–0.82ppm. We present an asteroseismic analysis of solar-like oscillations on TrES-2A which we use to calculate the stellar mass of 0.94 ±0.05 M and radius of 0.95±0.02 R. Using these stellar parameters, a transit model fit and the phase-curve variations, we determine the planetary radius of 1.162+0.020–0.024RJup and derive a mass for TrES-2b from the photometry of 1.44±0.21 MJup. The ratio of the ellipsoidal variation to the Doppler beaming amplitudes agrees to better than 2σ with theoretical predications, while our measured planet mass and radius agree within 2σ of previously published values based on spectroscopic radial velocity measurements. We measure a geometric albedo of 0.0136+0.0022–0.0033 and an occultation (secondary eclipse) depth of 6.5+1.7–1.8 ppm which we combined with the day/night planetary flux ratio to model the atmosphere of TrES-2b. We find that an atmosphere model that contains a temperature inversion is strongly preferred. We hypothesize that the Kepler bandpass probes a significantly greater atmospheric depth on the night side relative to the day side.

Abstract Copyright:

Journal keyword(s): planets and satellites: individual: TrES-2b - stars: individual: TrES-2A - techniques: photometric

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Kepler-1 Er* 19 07 14.0375836512 +49 18 59.091482160   11.85 11.25     G0V 160 2
2 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 302 2
3 BD+46 2629A * 19 07 53.1397066992 +46 52 05.922122844           ~ 36 1
4 CoRoT-3 EB* 19 28 13.2642131544 +00 07 18.613986132   14.199 13.292 13.099 12.54 F3V 70 1
5 BD+47 2846b Pl 19 28 59.3538131541 +47 58 10.216250846           ~ 328 1
6 BD+47 2846 Er* 19 28 59.3538826128 +47 58 10.217007804   10.97 10.48     F6V 281 2

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2022.07.05-08:49:41

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