• 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

    The Young and Nearby Normal Type Ia Supernova 2018gv: UV-optical Observations and the Earliest Spectropolarimetry

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Yang_2020_ApJ_902_46.pdf
    Size:
    8.254Mb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    Yang, Yi cc
    Hoeflich, Peter
    Baade, Dietrich
    Maund, Justyn R.
    Wang, Lifan
    Brown, Peter. J.
    Stevance, Heloise F.
    Arcavi, Iair
    Burke, Jamison
    Cikota, Aleksandar
    Clocchiatti, Alejandro
    Gal-Yam, Avishay
    Graham, Melissa. L.
    Hiramatsu, Daichi
    Hosseinzadeh, Griffin
    Howell, D. Andrew
    Jha, Saurabh W.
    McCully, Curtis
    Patat, Ferdinando
    Sand, David. J.
    Schulze, Steve
    Spyromilio, Jason
    Valenti, Stefano
    Vinkó, József cc
    Wang, Xiaofeng cc
    Wheeler, J. Craig
    Yaron, Ofer
    Zhang, Jujia cc
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2020-10-09
    Keywords
    polarization
    galaxies: individual (NGC 2525)
    supernovae: individual (SN 2018gv)
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Yang, Y., Hoeflich, P., Baade, D., Maund, J. R., Wang, L., Brown, P. J., ... & Zhang, J. (2020). The young and nearby normal Type Ia supernova 2018gv: UV-optical observations and the earliest spectropolarimetry. The Astrophysical Journal, 902(1), 46.
    Journal
    ASTROPHYSICAL JOURNAL
    Rights
    © 2020. 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
    The nondetection of companion stars in SN Ia progenitor systems lends support to the notion of double-degenerate systems and explosions triggered by the merging of two white dwarfs. This very asymmetric process should lead to a conspicuous polarimetric signature. By contrast, observations consistently find very low continuum polarization as the signatures from the explosion process largely dominate over the pre-explosion configuration within several days. Critical information about the interaction of the ejecta with a companion and any circumstellar matter is encoded in the early polarization spectra. In this study, we obtain spectropolarimetry of SN 2018gv with the ESO Very Large Telescope at -13.6 days relative to theB-band maximum light, or similar to 5 days after the estimated explosion-the earliest spectropolarimetric observations to date of any SN Ia. These early observations still show a low continuum polarization (less than or similar to 0.2%) and moderate line polarization (0.30% 0.04% for the prominent Siii lambda 6355 feature and 0.85% 0.04% for the high-velocity Ca component). The high degree of spherical symmetry implied by the low-line and continuum polarization at this early epoch is consistent with explosion models of delayed detonations and is inconsistent with the merger-induced explosion scenario. The dense UV and optical photometry and optical spectroscopy within the first similar to 100 days after the maximum light indicate that SN 2018gv is a normal SN Ia with similar spectrophotometric behavior to SN 2011fe.
    ISSN
    0004-637X
    EISSN
    1538-4357
    DOI
    10.3847/1538-4357/aba759
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/aba759
    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.