The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler

Jean Michel Désert, David Charbonneau, Jonathan J. Fortney, Nikku Madhusudhan, Heather A. Knutson, François Fressin, Drake Deming, William J. Borucki, Timothy M. Brown, Douglas Caldwell, Eric B. Ford, Ronald L. Gilliland, David W. Latham, Geoffrey W. Marcy, Sara Seager

Research output: Contribution to journalArticle

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Abstract

This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near-infrared with Warm-Spitzer Space Telescope and at optical wavelengths by combining more than a year of Kepler photometry. The investigation consists of constraining the eccentricities of these systems and of obtaining broadband emergent photometric data for individual planets. For both targets, the occultations are detected at the 3σ level at each wavelength with mid-occultation times consistent with circular orbits. The brightness temperatures of these planets are deduced from the infrared observations and reach T Spitzer = 1930 ± 100 K and T Spitzer = 1660 ± 120 K for Kepler-5b and Kepler-6b, respectively. We measure optical geometric albedos Ag in the Kepler bandpass and find Ag = 0.12 ± 0.04 for Kepler-5b and A g = 0.11 ± 0.04 for Kepler-6b, leading to upper an limit for the Bond albedo of A B ≤ 0.17 in both cases. The observations for both planets are best described by models for which most of the incident energy is redistributed on thedayside, with only less than 10% of the absorbed stellar flux redistributed to the nightside of these planets.

Original languageEnglish (US)
Article number11
JournalAstrophysical Journal, Supplement Series
Volume197
Issue number1
DOIs
StatePublished - Nov 1 2011

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occultation
Jupiter (planet)
Jupiter
planets
planet
atmospheres
atmosphere
albedo
wavelength
Space Infrared Telescope Facility
brightness temperature
circular orbits
extrasolar planets
eccentricity
wavelengths
photometry
near infrared
broadband
stars
energy

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Désert, J. M., Charbonneau, D., Fortney, J. J., Madhusudhan, N., Knutson, H. A., Fressin, F., ... Seager, S. (2011). The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler. Astrophysical Journal, Supplement Series, 197(1), [11]. https://doi.org/10.1088/0067-0049/197/1/11
Désert, Jean Michel ; Charbonneau, David ; Fortney, Jonathan J. ; Madhusudhan, Nikku ; Knutson, Heather A. ; Fressin, François ; Deming, Drake ; Borucki, William J. ; Brown, Timothy M. ; Caldwell, Douglas ; Ford, Eric B. ; Gilliland, Ronald L. ; Latham, David W. ; Marcy, Geoffrey W. ; Seager, Sara. / The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler. In: Astrophysical Journal, Supplement Series. 2011 ; Vol. 197, No. 1.
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abstract = "This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near-infrared with Warm-Spitzer Space Telescope and at optical wavelengths by combining more than a year of Kepler photometry. The investigation consists of constraining the eccentricities of these systems and of obtaining broadband emergent photometric data for individual planets. For both targets, the occultations are detected at the 3σ level at each wavelength with mid-occultation times consistent with circular orbits. The brightness temperatures of these planets are deduced from the infrared observations and reach T Spitzer = 1930 ± 100 K and T Spitzer = 1660 ± 120 K for Kepler-5b and Kepler-6b, respectively. We measure optical geometric albedos Ag in the Kepler bandpass and find Ag = 0.12 ± 0.04 for Kepler-5b and A g = 0.11 ± 0.04 for Kepler-6b, leading to upper an limit for the Bond albedo of A B ≤ 0.17 in both cases. The observations for both planets are best described by models for which most of the incident energy is redistributed on thedayside, with only less than 10{\%} of the absorbed stellar flux redistributed to the nightside of these planets.",
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Désert, JM, Charbonneau, D, Fortney, JJ, Madhusudhan, N, Knutson, HA, Fressin, F, Deming, D, Borucki, WJ, Brown, TM, Caldwell, D, Ford, EB, Gilliland, RL, Latham, DW, Marcy, GW & Seager, S 2011, 'The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler', Astrophysical Journal, Supplement Series, vol. 197, no. 1, 11. https://doi.org/10.1088/0067-0049/197/1/11

The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler. / Désert, Jean Michel; Charbonneau, David; Fortney, Jonathan J.; Madhusudhan, Nikku; Knutson, Heather A.; Fressin, François; Deming, Drake; Borucki, William J.; Brown, Timothy M.; Caldwell, Douglas; Ford, Eric B.; Gilliland, Ronald L.; Latham, David W.; Marcy, Geoffrey W.; Seager, Sara.

In: Astrophysical Journal, Supplement Series, Vol. 197, No. 1, 11, 01.11.2011.

Research output: Contribution to journalArticle

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T1 - The atmospheres of the hot-Jupiters Kepler-5b and Kepler-6b observed during occultations with Warm-Spitzer and Kepler

AU - Désert, Jean Michel

AU - Charbonneau, David

AU - Fortney, Jonathan J.

AU - Madhusudhan, Nikku

AU - Knutson, Heather A.

AU - Fressin, François

AU - Deming, Drake

AU - Borucki, William J.

AU - Brown, Timothy M.

AU - Caldwell, Douglas

AU - Ford, Eric B.

AU - Gilliland, Ronald L.

AU - Latham, David W.

AU - Marcy, Geoffrey W.

AU - Seager, Sara

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N2 - This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near-infrared with Warm-Spitzer Space Telescope and at optical wavelengths by combining more than a year of Kepler photometry. The investigation consists of constraining the eccentricities of these systems and of obtaining broadband emergent photometric data for individual planets. For both targets, the occultations are detected at the 3σ level at each wavelength with mid-occultation times consistent with circular orbits. The brightness temperatures of these planets are deduced from the infrared observations and reach T Spitzer = 1930 ± 100 K and T Spitzer = 1660 ± 120 K for Kepler-5b and Kepler-6b, respectively. We measure optical geometric albedos Ag in the Kepler bandpass and find Ag = 0.12 ± 0.04 for Kepler-5b and A g = 0.11 ± 0.04 for Kepler-6b, leading to upper an limit for the Bond albedo of A B ≤ 0.17 in both cases. The observations for both planets are best described by models for which most of the incident energy is redistributed on thedayside, with only less than 10% of the absorbed stellar flux redistributed to the nightside of these planets.

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