Published December 1, 2013
| Published + Submitted
Journal Article
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A Near-Infrared Transmission Spectrum for the Warm Saturn HAT-P-12b
Chicago
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Abstract
We present a HST WFC3 transmission spectrum for the transiting exoplanet HAT-P-12b. This warm (1000 K) sub-Saturn-mass planet has a smaller mass and a lower temperature than the hot-Jupiters that have been studied so far. We find that the planet's measured transmission spectrum lacks the expected water absorption feature for a hydrogen-dominated atmosphere, and is instead best-described by a model with high-altitude clouds. Using a frequentist hypothesis testing procedure, we can rule out a hydrogen-dominated cloud free atmosphere to 4.9σ. When combined with other recent WFC3 studies, our observations suggest that clouds may be common in exoplanetary atmospheres.
Additional Information
© 2013 American Astronomical Society. Received 2013 September 2; accepted 2013 October 16; published 2013 November 13. J.-M.D. acknowledges funding from NASA through the Sagan Exoplanet Fellowship program administered by the NASA Exoplanet Science Institute (NExScI).Attached Files
Published - 0004-637X_778_2_183.pdf
Submitted - 1310.4796v1.pdf
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1310.4796v1.pdf
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Additional details
- Eprint ID
- 42217
- Resolver ID
- CaltechAUTHORS:20131104-102917314
- NASA Sagan Fellowship
- NASA Exoplanet Science Institute (NExScI)
- Created
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2013-11-04Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)