• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    CLOUD ATLAS: DISCOVERY OF PATCHY CLOUDS AND HIGH-AMPLITUDE ROTATIONAL MODULATIONS IN A YOUNG, EXTREMELY RED L-TYPE BROWN DWARF

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Lew_2016_ApJL_829_L32.pdf
    Size:
    848.8Kb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    Lew, Ben W. P. cc
    Apai, Daniel
    Zhou, Yifan cc
    Schneider, Glenn cc
    Burgasser, Adam J. cc
    Karalidi, Theodora cc
    Yang, Hao cc
    Marley, Mark S. cc
    Cowan, Nicolas B. cc
    Bedin, Luigi R.
    Metchev, Stanimir A. cc
    Radigan, Jacqueline
    Lowrance, Patrick J. cc
    Show allShow less
    Affiliation
    Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab
    Univ Arizona, Dept Astron, Steward Observ
    Issue Date
    2016-09-29
    Keywords
    brown dwarfs
    stars: atmospheres
    stars: individual (WISEP J004701.06+680352.1)
    stars: low-mass
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    CLOUD ATLAS: DISCOVERY OF PATCHY CLOUDS AND HIGH-AMPLITUDE ROTATIONAL MODULATIONS IN A YOUNG, EXTREMELY RED L-TYPE BROWN DWARF 2016, 829 (2):L32 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
    Condensate clouds fundamentally impact the atmospheric structure and spectra of exoplanets and brown dwarfs, but the connections between surface gravity, cloud structure, dust in the upper atmosphere, and the red colors of some brown dwarfs remain poorly understood. Rotational modulations enable the study of different clouds in the same atmosphere, thereby providing a method to isolate the effects of clouds. Here, we present the discovery of high peak-to-peak amplitude (8%) rotational modulations in a low-gravity, extremely red (J-K-s = 2.55) L6 dwarf WISEP J004701.06+680352.1 (W0047). Using the Hubble Space Telescope (HST) time-resolved grism spectroscopy, we find a best-fit rotational period (13.20 +/- 0.14 hr) with a larger amplitude at 1.1 mu m than at 1.7 mu m. This is the third-largest near-infrared variability amplitude measured in a brown dwarf, demonstrating that large-amplitude variations are not limited to the L/T transition but are present in some extremely red L-type dwarfs. We report a tentative trend between the wavelength dependence of relative amplitude, possibly proxy for small dust grains lofted in the upper atmosphere, and the likelihood of large-amplitude variability. By assuming forsterite as a haze particle, we successfully explain the wavelength-dependent amplitude with submicron-sized haze particle sizes of around 0.4 mu m. W0047 links the earlier spectral and later spectral type brown dwarfs in which rotational modulations have been observed; the large amplitude variations in this object make this a benchmark brown dwarf for the study of cloud properties close to the L/T transition.
    ISSN
    2041-8213
    DOI
    10.3847/2041-8205/829/2/L32
    Version
    Final published version
    Sponsors
    Technology Research Initiative Fund (TRIF) Imaging Fellowship, University of Arizona; NASA through a grant from the Space Telescope Science Institute [14241]; NASA [NAS5-26555]; Space Telescope Science Institute [14241]; National Aeronautics and Space Administration; National Science Foundation
    Additional Links
    http://stacks.iop.org/2041-8205/829/i=2/a=L32?key=crossref.9855bfdeca51dc5bcc43c81ab8dceed1
    ae974a485f413a2113503eed53cd6c53
    10.3847/2041-8205/829/2/L32
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.