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    Detection of Water Vapor in the Thermal Spectrum of the Non-transiting Hot Jupiter Upsilon Andromedae b

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    Author
    Piskorz, Danielle
    Benneke, Björn cc
    Crockett, Nathan R. cc
    Lockwood, Alexandra C.
    Blake, Geoffrey A. cc
    Barman, Travis S. cc
    Bender, Chad cc
    Carr, John S. cc
    Johnson, John A. cc
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Univ Arizona, Dept Astron
    Univ Arizona, Steward Observ
    Issue Date
    2017-08-01
    Keywords
    planets and satellites: atmospheres
    techniques: spectroscopic
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Detection of Water Vapor in the Thermal Spectrum of the Non-transiting Hot Jupiter Upsilon Andromedae b 2017, 154 (2):78 The Astronomical Journal
    Journal
    The Astronomical 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
    The Upsilon Andromedae system was the first multi-planet system discovered orbiting a main-sequence star. We describe the detection of water vapor in the atmosphere of the innermost non-transiting gas giant ups. And. b by treating the star-planet system as a spectroscopic binary with high-resolution, ground-based spectroscopy. We resolve the signal of the planet's motion and break the mass-inclination degeneracy for this non-transiting planet via deep combined flux observations of the star and the planet. In total, seven epochs of Keck NIRSPEC L band observations, three epochs of Keck NIRSPEC short-wavelength K band observations, and three epochs of Keck NIRSPEC long wavelength K band observations of the ups. And. system were obtained. We perform a multi-epoch cross-correlation of the full data set with an atmospheric model. We measure the radial projection of the Keplerian velocity (K-P = 55 +/- 9 km s(-1)), true mass (M-b = 1.7(-0.24)(+0.33)M(J)), and orbital inclination (i(b) 24 degrees +/- 4 degrees), and determine that the planet's opacity structure is dominated by water vapor at the probed wavelengths. Dynamical simulations of the planets in the ups. And. system with these orbital elements for ups. And. b show that stable, long-term (100 Myr) orbital configurations exist. These measurements will inform future studies of the stability and evolution of the ups. And. system, as well as the atmospheric structure and composition of the hot Jupiter.
    ISSN
    1538-3881
    DOI
    10.3847/1538-3881/aa7dd8
    Version
    Final published version
    Sponsors
    WM Keck Foundation; NSF Astronomy Astrophysics; NASA [AST-1109857, NNX16AI14G]; 6.1 base
    Additional Links
    http://stacks.iop.org/1538-3881/154/i=2/a=78?key=crossref.bdb9f591ce0b4da81d04cfa016261e6d
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/aa7dd8
    Scopus Count
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    UA Faculty Publications

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