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    DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche

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    Takir_2017_AJ_153_31.pdf
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    Final Published Version
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    Author
    Takir, Driss
    Reddy, Vishnu
    Sanchez, Juan A.
    Shepard, Michael K.
    Emery, Joshua P.
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2016-12-28
    Keywords
    minor planets
    asteroids: general
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche 2016, 153 (1):31 The Astronomical Journal
    Journal
    The Astronomical 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
    In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 mu m spectral region using the long-wavelength cross-dispersed (LXD: 1.9-4.2 mu m) mode of the SpeX spectrograph/imager at the NASA Infrared Telescope Facility. Our observations show that Psyche exhibits a 3 mu m absorption feature, attributed to water or hydroxyl. The 3 m absorption feature is consistent with the hydration features found on the surfaces of water-rich asteroids, attributed to OH- and/or H2O-bearing phases (phyllosilicates). The detection of a 3 mu m hydration absorption band on Psyche suggests that this asteroid may not be a. metallic core, or it could be a metallic core that has been impacted by carbonaceous material over the past 4.5 Gyr. Our results also indicate rotational spectral variations, which we suggest reflect heterogeneity in the metal/silicate ratio on the surface of Psyche.
    ISSN
    1538-3881
    DOI
    10.3847/1538-3881/153/1/31
    Version
    Final published version
    Sponsors
    NASA [NNH14CK55B]; Eugene M. Shoemaker Postdoctoral Fellowship (NASA Planetary Geology and Geophysics Program); NASA Planetary Geology and Geophysics grants [NNX14AN05G, NNX14AN35G]; NASA Solar System Observing grant [NNX16AE91G]
    Additional Links
    http://stacks.iop.org/1538-3881/153/i=1/a=31?key=crossref.8aa084aadb3516627db44f7e45b0aaf8
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/153/1/31
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