PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM
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 [sup...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95638 |
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| author | Barclay, Thomas Huber, Daniel Rowe, Jason F. Fortney, Jonathan J. Morley, Caroline V. Quintana, Elisa V. Fabrycky, Daniel C. Barentsen, Geert Bloemen, S. Christiansen, Jessie L. Demory, Brice-Olivier Fulton, Benjamin J. Jenkins, Jon M. Mullally, Fergal Ragozzine, Darin Seader, Shaun E. Shporer, Avi Tenenbaum, Peter Thompson, Susan E. |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Barclay, Thomas Huber, Daniel Rowe, Jason F. Fortney, Jonathan J. Morley, Caroline V. Quintana, Elisa V. Fabrycky, Daniel C. Barentsen, Geert Bloemen, S. Christiansen, Jessie L. Demory, Brice-Olivier Fulton, Benjamin J. Jenkins, Jon M. Mullally, Fergal Ragozzine, Darin Seader, Shaun E. Shporer, Avi Tenenbaum, Peter Thompson, Susan E. |
| author_sort | Barclay, Thomas |
| collection | MIT |
| description | 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 [superscript +0.44] [subscript –0.62] and 3.44 [superscript +0.32] [subscript –0.37] parts per million (ppm), respectively, and a difference between the dayside and the nightside planetary flux of 3.41[superscript +0.55] [subscript –0.82] ppm. 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 [subscript ☉] and radius of 0.95 ± 0.02 R [subscript ☉]. Using these stellar parameters, a transit model fit and the phase-curve variations, we determine the planetary radius of 1.162[superscript +0.020] [subscript –0.024] R[subscript Jup] and derive a mass for TrES-2b from the photometry of 1.44 ± 0.21 M [subscript Jup]. 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[superscript +0.0022] [subscript –0.0033] and an occultation (secondary eclipse) depth of 6.5 [superscript +1.7] [subscript –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. |
| first_indexed | 2024-09-23T08:58:45Z |
| format | Article |
| id | mit-1721.1/95638 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:58:45Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/956382022-09-30T12:32:56Z PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM Barclay, Thomas Huber, Daniel Rowe, Jason F. Fortney, Jonathan J. Morley, Caroline V. Quintana, Elisa V. Fabrycky, Daniel C. Barentsen, Geert Bloemen, S. Christiansen, Jessie L. Demory, Brice-Olivier Fulton, Benjamin J. Jenkins, Jon M. Mullally, Fergal Ragozzine, Darin Seader, Shaun E. Shporer, Avi Tenenbaum, Peter Thompson, Susan E. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Demory, Brice-Olivier 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 [superscript +0.44] [subscript –0.62] and 3.44 [superscript +0.32] [subscript –0.37] parts per million (ppm), respectively, and a difference between the dayside and the nightside planetary flux of 3.41[superscript +0.55] [subscript –0.82] ppm. 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 [subscript ☉] and radius of 0.95 ± 0.02 R [subscript ☉]. Using these stellar parameters, a transit model fit and the phase-curve variations, we determine the planetary radius of 1.162[superscript +0.020] [subscript –0.024] R[subscript Jup] and derive a mass for TrES-2b from the photometry of 1.44 ± 0.21 M [subscript Jup]. 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[superscript +0.0022] [subscript –0.0033] and an occultation (secondary eclipse) depth of 6.5 [superscript +1.7] [subscript –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. 2015-02-25T21:51:58Z 2015-02-25T21:51:58Z 2012-11 2012-08 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/95638 Barclay, Thomas, Daniel Huber, Jason F. Rowe, Jonathan J. Fortney, Caroline V. Morley, Elisa V. Quintana, Daniel C. Fabrycky, et al. “PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM.” The Astrophysical Journal 761, no. 1 (November 21, 2012): 53. © 2012 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-637x/761/1/53 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Barclay, Thomas Huber, Daniel Rowe, Jason F. Fortney, Jonathan J. Morley, Caroline V. Quintana, Elisa V. Fabrycky, Daniel C. Barentsen, Geert Bloemen, S. Christiansen, Jessie L. Demory, Brice-Olivier Fulton, Benjamin J. Jenkins, Jon M. Mullally, Fergal Ragozzine, Darin Seader, Shaun E. Shporer, Avi Tenenbaum, Peter Thompson, Susan E. PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title | PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title_full | PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title_fullStr | PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title_full_unstemmed | PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title_short | PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE TrES-2 SYSTEM |
| title_sort | photometrically derived masses and radii of the planet and star in the tres 2 system |
| url | http://hdl.handle.net/1721.1/95638 |
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