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    A Complete ALMA Map of the Fomalhaut Debris Disk

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    MacGregor_2017_ApJ_842_8.pdf
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    Author
    MacGregor, Meredith A. cc
    Matra, Luca
    Kalas, Paul
    Wilner, D. cc
    Pan, Margaret
    Kennedy, Grant M. cc
    Wyatt, Mark C. cc
    Duchêne, Gaspard cc
    Hughes, A. Meredith
    Rieke, George H. cc
    Clampin, Mark
    Fitzgerald, Michael P. cc
    Graham, James R.
    Holland, Wayne S.
    Panic, Olja
    Shannon, Andrew cc
    Su, Kate Y. L. cc
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    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2017-06-07
    Keywords
    circumstellar matter
    stars: individual (Fomalhaut)
    submillimeter: planetary systems
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    A Complete ALMA Map of the Fomalhaut Debris Disk 2017, 842 (1):8 The Astrophysical Journal
    Journal
    The Astrophysical 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
    We present ALMA mosaic observations at 1.3. mm (223 GHz) of the Fomalhaut system with a sensitivity of 14 mu Jy/beam. These observations provide the first millimeter map of the continuum dust emission from the complete outer debris disk with uniform sensitivity, enabling the first conclusive detection of apocenter glow. We adopt an MCMC modeling approach that accounts for the eccentric orbital parameters of a collection of particles within the disk. The outer belt is radially confined with an inner edge of 136.3 +/- 0.9. au and width of 13.5 +/- 1.8. au. We determine a best-fit eccentricity of 0.12 +/- 0.01. Assuming a size distribution power-law index of q. =. 3.46 +/- 0.09, we constrain the dust absorptivity power-law index a to be 0.9
    ISSN
    1538-4357
    DOI
    10.3847/1538-4357/aa71ae
    Version
    Final published version
    Sponsors
    National Science Foundation Graduate Research Fellowship [DGE1144152]; NRAO Student Observing Support; STFC; European Union through ERC [279973]; NASA [NNX15AC89G, NNX15AD95G/NEXSS, NNX15AK23G, NNX15AM35G]; NSF [AST-1518332, HST-GO-13726, AST-1412647]; NASA's Science Mission Directorate; Royal Society as a Royal Society University Research Fellow; Royal Society Dorothy Hodgkin Fellowship; Center for Exoplanets and Habitable Worlds; Pennsylvania State University; Eberly College of Science; Pennsylvania Space Grant Consortium
    Additional Links
    http://stacks.iop.org/0004-637X/842/i=1/a=8?key=crossref.31ce09ed6c0ffdcbd64761e52703f12c
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/aa71ae
    Scopus Count
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