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    Low luminosity type II supernovae-II. Pointing towards moderate mass precursors

    271972.pdf (3.311Mb)
    Access Status
    Open access
    Authors
    Spiro, S.
    Pastorello, A.
    Pumo, M.
    Zampieri, L.
    Turatto, M.
    Smartt, S.
    Benetti, S.
    Cappellaro, E.
    Valenti, S.
    Agnoletto, I.
    Altavilla, G.
    Aoki, T.
    Brocato, E.
    Corsini, E.
    Di Cianno, A.
    Elias-Rosa, N.
    Hamuy, M.
    Enya, K.
    Fiaschi, M.
    Folatelli, G.
    Desidera, S.
    Harutyunyan, A.
    Howell, D.
    Kawka, Adela
    Kobayashi, Y.
    Leibundgut, B.
    Minezaki, T.
    Navasardyan, H.
    Nomoto, K.
    Mattila, S.
    Pietrinferni, A.
    Pignata, G.
    Raimondo, G.
    Salvo, M.
    Schmidt, B.
    Sollerman, J.
    Spyromilio, J.
    Taubenberger, S.
    Valentini, G.
    Vennes, S.
    Yoshii, Y.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Spiro, S. and Pastorello, A. and Pumo, M. and Zampieri, L. and Turatto, M. and Smartt, S. and Benetti, S. et al. 2014. Low luminosity type II supernovae-II. Pointing towards moderate mass precursors. Monthly Notices of the Royal Astronomical Society. 439 (3): pp. 2873-2892.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stu156
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/73145
    Collection
    • Curtin Research Publications
    Abstract

    We present new data for five underluminous Type II-plateau supernovae (SNe IIP), namely SN 1999gn, SN 2002gd, SN 2003Z, SN 2004eg and SN 2006ov. This new sample of lowluminosity SNe IIP (LL SNe IIP) is analysed together with similar objects studied in the past. All of them show a flat light-curve plateau lasting about 100 d, an underluminous late-time exponential tail, intrinsic colours that are unusually red, and spectra showing prominent and narrow P Cygni lines. A velocity of the ejected material below 103 km s-1 is inferred from measurements at the end of the plateau. The 56Ni masses ejected in the explosion are very small (=10-2 M?). We investigate the correlations among 56Ni mass, expansion velocity of the ejecta and absolute magnitude in the middle of the plateau, confirming the main findings of Hamuy, according to which events showing brighter plateau and larger expansion velocities are expected to produce more 56Ni. We propose that these faint objects represent the LL tail of a continuous distribution in parameters space of SNe IIP. The physical properties of the progenitors at the explosion are estimated through the hydrodynamical modelling of the observables for two representative events of this class, namely SN 2005cs and SN 2008in. We find that the majority of LL SNe IIP, and quite possibly all, originate in the core collapse of intermediate-mass stars, in the mass range 10-15 M?. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

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