THE ATMOSPHERES OF THE HOT-JUPITERS KEPLER-5b AND KEPLER-6b OBSERVED DURING OCCULTATIONS WITH WARM-SPITZER AND KEPLER

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/197/1/11· OSTI ID:22047346

Desert, Jean-Michel; Charbonneau, David; Fressin, Francois; Latham, David W ^[1]; Fortney, Jonathan J ^[2]; Madhusudhan, Nikku ^[3]; Knutson, Heather A ^[4]; Deming, Drake ^[5]; Borucki, William J ^[6]; Brown, Timothy M ^[7]; Caldwell, Douglas ^[8]; Ford, Eric B ^[9]; Gilliland, Ronald L ^[10]; Marcy, Geoffrey W ^[11]; Seager, Sara ^[12]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
2. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
3. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)
4. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
5. Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
6. NASA Ames Research Center, Moffett Field, CA 94035 (United States)
7. Las Cumbres Observatory Global Telescope, Goleta, CA 93117 (United States)
8. SETI Institute, Mountain View, CA 94043 (United States)
9. Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States)
10. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
11. Berkeley Astronomy Department, University of California, Berkeley, CA 94720 (United States)
12. Massachusetts Institute of Technology, Cambridge, MA 02159 (United States)

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 3{sigma} 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{sub Spitzer} = 1930 {+-} 100 K and T{sub Spitzer} = 1660 {+-} 120 K for Kepler-5b and Kepler-6b, respectively. We measure optical geometric albedos A{sub g} in the Kepler bandpass and find A{sub g} = 0.12 {+-} 0.04 for Kepler-5b and A{sub g} = 0.11 {+-} 0.04 for Kepler-6b, leading to upper an limit for the Bond albedo of A{sub 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 the dayside, with only less than 10% of the absorbed stellar flux redistributed to the nightside of these planets.

• OSTI ID: 22047346
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 197, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ALBEDO
ASTRONOMY
ASTROPHYSICS
ATMOSPHERES
BRIGHTNESS
DETECTION
ECLIPSE
ORBITS
PHOTOMETRY
PLANETS
SPACE
STARS
STELLAR RADIATION
TELESCOPES
WAVELENGTHS