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    EVIDENCE FOR THE DIRECT DETECTION OF THE THERMAL SPECTRUM OF THE NON-TRANSITING HOT GAS GIANT HD 88133 b

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    Piskorz_2016_ApJ_832_131.pdf
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    Author
    Piskorz, Danielle
    Benneke, Björn
    Crockett, Nathan R. cc
    Lockwood, Alexandra C.
    Blake, Geoffrey A. cc
    Barman, Travis S. cc
    Bender, Chad cc
    Bryan, Marta cc
    Carr, John S.
    Fischer, Debra A. cc
    Howard, Andrew W. cc
    Isaacson, Howard T. cc
    Johnson, John A. cc
    Show allShow less
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Univ Arizona, Dept Astron
    Univ Arizona, Steward Observ
    Issue Date
    2016-11-23
    Keywords
    planets and satellites: atmospheres
    techniques: spectroscopic
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    EVIDENCE FOR THE DIRECT DETECTION OF THE THERMAL SPECTRUM OF THE NON-TRANSITING HOT GAS GIANT HD 88133 b 2016, 832 (2):131 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2016. 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 target the thermal emission spectrum of the non-transiting gas giant HD 88133 b with high-resolution near-infrared spectroscopy, by treating the planet and its host star as a spectroscopic binary. For sufficiently deep summed flux observations of the star and planet across multiple epochs, it is possible to resolve the signal of the hot gas giant's atmosphere compared to the brighter stellar spectrum, at a level consistent with the aggregate shot noise of the full data set. To do this, we first perform a principal component analysis to remove the contribution of the Earth's atmosphere to the observed spectra. Then, we use a cross-correlation analysis to tease out the spectra of the host star and HD 88133 b to determine its orbit and identify key sources of atmospheric opacity. In total, six epochs of Keck NIRSPEC L-band observations and three epochs of Keck NIRSPEC K-band observations of the HD 88133 system were obtained. Based on an analysis of the maximum likelihood curves calculated from the multi-epoch cross-correlation of the full data set with two atmospheric models, we report the direct detection of the emission spectrum of the non-transiting exoplanet HD 88133 b and measure a radial projection of the Keplerian orbital velocity of 40 +/- 15 km s(-1), a true mass of 1.02(-0.28)(+0.61) M-J, a nearly face-on orbital inclination of 15(-5)(+60), and an atmosphere opacity structure at high dispersion dominated by water vapor. This, combined with 11 years of radial velocity measurements of the system, provides the most up-to-date ephemeris for HD 88133.
    ISSN
    1538-4357
    DOI
    10.3847/0004-637X/832/2/131
    Version
    Final published version
    Sponsors
    W.M. Keck Foundation; NSF Astronomy Astrophysics; NASA Exoplanets Research Programs [AST-1109857, NNX16AI14G]; Pennsylvania State Unviersity; Eberly College of Science; Pennsylvania Space Grant Consortium; 6.1 base funding
    Additional Links
    http://stacks.iop.org/0004-637X/832/i=2/a=131?key=crossref.6e3c0b7a5a435c7cfe224f92d07515cf
    ae974a485f413a2113503eed53cd6c53
    10.3847/0004-637X/832/2/131
    Scopus Count
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    UA Faculty Publications

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