• 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

    Multiple Rings of Millimeter Dust Emission in the HD 15115 Debris Disk

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    MacGregor_2019_ApJL_877_L32.pdf
    Size:
    976.5Kb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    MacGregor, Meredith A.
    Weinberger, Alycia J.
    Nesvold, Erika R.
    Hughes, A. Meredith
    Wilner, D. J.
    Currie, Thayne
    Debes, John H. cc
    Donaldson, Jessica K.
    Redfield, Seth cc
    Roberge, Aki
    Schneider, Glenn cc
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2019-05-31
    Keywords
    circumstellar matter
    stars: individual (HD 15115)
    submillimeter: planetary systems
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Meredith A. MacGregor et al 2019 ApJL 877 L32
    Journal
    ASTROPHYSICAL JOURNAL LETTERS
    Rights
    Copyright © 2019. 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 observations of the HD 15115 debris disk from the Atacama Large Millimeter/submillimeter Array (ALMA) at 1.3 mm that capture this intriguing system with the highest resolution (0 ''.6 or 29 au) at millimeter wavelengths to date. This new ALMA image shows evidence for two rings in the disk separated by a cleared gap. By fitting models directly to the observed visibilities within a Markov Chain Monte Carlo framework, we are able to characterize the millimeter continuum emission and place robust constraints on the disk structure and geometry. In the best-fit model of a power-law disk with a Gaussian gap, the disk inner and outer edges are at 43.9 +/- 5.8 au (0 ''.89 +/- 0 ''.12) and 92.2 +/- 2.4 au (1 ''.88 +/- 0 ''.49), respectively, with a gap located at 58.9 +/- 4.5 au (1 ''.2 +/- 0 ''.10) with a fractional depth of 0.88 +/- 0.10 and a width of 13.8 +/- 5.6 au (0 ''.28 +/- 0 ''.11). Because we do not see any evidence at millimeter wavelengths for the dramatic east-west asymmetry seen in scattered light, we conclude that this feature most likely results from a mechanism that only affects small grains. Using dynamical modeling and our constraints on the gap properties, we are able to estimate a mass for the possible planet sculpting the gap to be 0.16 +/- 0.06 M-Jup.
    ISSN
    2041-8205
    DOI
    10.3847/2041-8213/ab21c2
    Version
    Final published version
    Sponsors
    National Science Foundation Astronomy and Astrophysics Postdoctoral Fellowship [AST-1701406]; NSF [AST-1412647, AST-1313268]
    ae974a485f413a2113503eed53cd6c53
    10.3847/2041-8213/ab21c2
    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.