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    The Type II-plateau Supernova 2017eaw in NGC 6946 and Its Red Supergiant Progenitor

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    Van_Dyk_2019_ApJ_875_136.pdf
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    Author
    Van Dyk, Schuyler D.
    Zheng, WeiKang cc
    Maund, Justyn R.
    Brink, Thomas G.
    Srinivasan, Sundar
    Andrews, Jennifer E.
    Smith, Nathan
    Leonard, Douglas C.
    Morozova, Viktoriya
    Filippenko, Alexei V.
    Conner, Brody
    Milisavljevic, Dan
    de Jaeger, Thomas
    Long, Knox S.
    Isaacson, Howard
    Crossfield, Ian J. M.
    Kosiarek, Molly R.
    Howard, Andrew W. cc
    Fox, Ori D.
    Kelly, Patrick L.
    Piro, Anthony L.
    Littlefair, Stuart P.
    Dhillon, Vik S.
    Wilson, Richard
    Butterley, Timothy
    Yunus, Sameen
    Channa, Sanyum
    Jeffers, Benjamin T.
    Falcon, Edward
    Ross, Timothy W.
    Hestenes, Julia C.
    Stegman, Samantha M.
    Zhang, Keto
    Kumar, Sahana
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2019-04-24
    Keywords
    galaxies: distances and redshifts
    galaxies: individual (NGC 6946)
    stars: massive
    supergiants
    supernovae: general
    supernovae: individual (SN 2017eaw)
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Schuyler D. Van Dyk et al 2019 ApJ 875 136
    Journal
    ASTROPHYSICAL JOURNAL
    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 extensive optical photometric and spectroscopic observations, from 4 to 482 days after explosion, of the Type II-plateau (II-P) supernova (SN) 2017eaw in NGC 6946. SN 2017eaw is a normal SN II-P intermediate in properties between, for example, SN 1999em and SN 2012aw and the more luminous SN 2004et, also in NGC 6946. We have determined that the extinction to SN 2017eaw is primarily due to the Galactic foreground and that the SN site metallicity is likely subsolar. We have also independently confirmed a tip-of-the-red-giant-branch (TRGB) distance to NGC 6946 of 7.73 ± 0.78 Mpc. The distances to the SN that we have also estimated via both the standardized candle method and expanding photosphere method corroborate the TRGB distance. We confirm the SN progenitor identity in pre-explosion archival Hubble Space Telescope (HST) and Spitzer Space Telescope images, via imaging of the SN through our HST Target of Opportunity program. Detailed modeling of the progenitor's spectral energy distribution indicates that the star was a dusty, luminous red supergiant consistent with an initial mass of ~15 M ⊙.
    ISSN
    0004-637X
    DOI
    10.3847/1538-4357/ab1136
    Version
    Final published version
    Sponsors
    National Aeronautics and Space Administration (NASA) [NAS5-26555]; NASA through grants from STScI [GO-14645, GO-15166]; JPL/Caltech; Royal Society University Research Fellowship; Taiwan Ministry of Science and Technology [MOST104-2628-M-001-004-MY3]; NSF [AST-1515559, DGE 1339067, AST-1211916]; TABASGO Foundation; Christopher R. Redlich Fund; Miller Institute for Basic Research in Science (U.C. Berkeley); NASA/HST grant from STScI [AR-14295]; Scialog award by the Research Corporation for Science Advancement; University of Sheffield Alumni Foundation; Science and Technology Facilities Council [ST/P000541/1]; W. M. Keck Foundation
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/ab1136
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    UA Faculty Publications

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