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    HST PanCET Program: A Cloudy Atmosphere for the Promising JWST Target WASP-101b

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    Wakeford_2017_ApJL_835_L12.pdf
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    Author
    Wakeford, H. R. cc
    Stevenson, K. B. cc
    Lewis, N. K. cc
    Sing, D. K. cc
    López-Morales, M. cc
    Marley, M.
    Kataria, T. cc
    Mandell, A.
    Ballester, G. E.
    Barstow, J. cc
    Ben-Jaffel, L. cc
    Bourrier, V.
    Buchhave, Lars A. cc
    Ehrenreich, David cc
    Evans, T.
    García Muñoz, A.
    Henry, G. cc
    Knutson, H.
    Lavvas, P.
    Lecavelier des Etangs, A.
    Nikolov, Nikolay cc
    Sanz-Forcada, J. cc
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    Affiliation
    Univ Arizona, Dept Planetary Sci
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2017-01-20
    Keywords
    planets and satellites: atmospheres
    planets and satellites: individual (WASP-101b)
    techniques: spectroscopic
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    HST PanCET Program: A Cloudy Atmosphere for the Promising JWST Target WASP-101b 2017, 835 (1):L12 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2017. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We present results from the first observations of the Hubble Space Telescope (HST) Panchromatic Comparative Exoplanet Treasury program for WASP-101b, a highly inflated hot Jupiter and one of the community targets proposed for the James Webb Space Telescope (JWST) Early Release Science (ERS) program. From a single HST Wide Field Camera 3 observation, we find that the near-infrared transmission spectrum of WASP-101b contains no significant H2O absorption features and we rule out a clear atmosphere at 13 sigma. Therefore, WASP-101b is not an optimum target for a JWST ERS program aimed at observing strong molecular transmission features. We compare WASP-101b to the well-studied and nearly identical hot Jupiter WASP-31b. These twin planets show similar temperature-pressure profiles and atmospheric features in the near-infrared. We suggest exoplanets in the same parameter space as WASP-101b and WASP-31b will also exhibit cloudy transmission spectral features. For future HST exoplanet studies, our analysis also suggests that a lower count limit needs to be exceeded per pixel on the detector in order to avoid unwanted instrumental systematics.
    ISSN
    2041-8213
    DOI
    10.3847/2041-8213/835/1/L12
    Version
    Final published version
    Sponsors
    NASA [NAS 5-26555]; NASA Postdoctoral Program at Goddard Space Flight Center; European Research Council under the European Unions Seventh Framework Programme/ERC [336792]; Royal Astronomical Society Research Fellowship; National Centre for Competence in Research "PlanetS" - Swiss National Science Foundation (SNSF); CNES (France) under project PACES; [GO-14767]
    Additional Links
    http://stacks.iop.org/2041-8205/835/i=1/a=L12?key=crossref.52b2019220c4a7c110a517df8b5eff1c
    ae974a485f413a2113503eed53cd6c53
    10.3847/2041-8213/835/1/L12
    Scopus Count
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    UA Faculty Publications

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