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The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor

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2018-07
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Anderson, P.
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The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor
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Author
  • Anderson, P.;
  • Dessart, L.;
  • Gutierrez, C.;
  • Kruhler, T.;
  • Galbany, Lluis;
  • Jerkstrand, A.;
  • Smartt, S.;
  • Contreras, C.;
  • Morrell, N.;
  • Phillips, M.;
  • Stritzinger, M.;
  • Hsiao, E.;
  • González Gaitán, Santiago;
  • Agliozzo, C.;
  • Castellon, Sergio;
  • Chambers, K.;
  • Chen, T.;
  • Flewelling, H.;
  • González, C.;
  • Hosseinzadeh, G.;
  • Huber, M.;
  • Fraser, M.;
  • Inserra, C.;
  • Kankare, E.;
  • Mattila, S.;
  • Magnier, E.;
  • Maguire, K.;
  • Lowe, T.;
  • Sollerman, J.;
  • Sullivan, M.;
  • Young, D.;
  • Valenti, S.;
Abstract
Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae(1). However, while such stars are observed with masses > 25 M-circle dot (ref. (2)), detections of > 18 M-circle dot progenitors remain elusive(1). Red supergiants are also expected to form at all metallicities, but discoveries of explosions from low-metallicity progenitors are scarce. Here, we report observations of the type II supernova, SN 2015bs, for which we infer a progenitor metallicity of <= 0.1 Z(circle dot) from comparison to photospheric-phase spectral models(3), and a zero-age main-sequence mass of 17-25 M-circle dot through comparison to nebular-phase spectral models(4,5). SN 2015bs displays a normal 'plateau' light-curve morphology, and typical spectral properties, implying a red supergiant progenitor. This is the first example of such a high-mass progenitor for a 'normal' type II supernova, suggesting a link between high-mass red supergiant explosions and low-metallicity progenitors.
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Entidad financiadora Número de concesión Alexander von Humboldt Foundation of Germany European Union's Framework Programme for Research and Innovation Horizon 2020 under Marie Sklodowska-Curie grant 702538 European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC Grant 291222 Science and Technology Facilities Council (STFC) ST/I001123/1 ST/L000709/1 Danish Agency for Science and Technology and Innovation through a Sapere Aude Level 2 grant VILLUM FONDEN 13261 Ministry of Economy, Development, and Tourism's Millennium Science Initiative IC120009 CONICYT through FONDECYT 3140566 3150463 Royal Society-Science Foundation Ireland University Research Fellowship STFC through an Ernest Rutherford Fellowship EU/FP7-ERC grant 615929 National Science Foundation AST0306969 AST0607438 AST1008343 AST1613426 European Organisation for Astronomical Research in the Southern Hemisphere, Chile as part of PESSTO (the Public ESO Spectroscopic Survey for Transient Objects) ESO program 188.D-3003 191.D-0935 European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 296.D-5003(A) European Union FP7 programme through ERC grant 320360 NASA NNX08AR22G NNX14AM74G NSF grant AST-1238877 Alfred P. Sloan Foundation National Science Foundation US Department of Energy National Aeronautics and Space Administration Japanese Monbukagakusho Max Planck Society Higher Education Funding Council for England
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Artículo de publicación ISI
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URI: https://repositorio.uchile.cl/handle/2250/153375
DOI: 10.1038/s41550-018-0458-4
ISSN: 2397-3366
Quote Item
Nature Astronomy, 2(7), Julio 2018, 574-579 pp.
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