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. 2013 Oct 17;502(7471):346-9.
doi: 10.1038/nature12569.

Slowly Fading Super-Luminous Supernovae That Are Not Pair-Instability Explosions

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Slowly Fading Super-Luminous Supernovae That Are Not Pair-Instability Explosions

M Nicholl et al. Nature. .

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  • Corrigendum: Slowly fading super-luminous supernovae that are not pair-instability explosions.
    Nicholl M, Smartt SJ, Jerkstrand A, Inserra C, McCrum M, Kotak R, Fraser M, Wright D, Chen TW, Smith K, Young DR, Sim SA, Valenti S, Howell DA, Bresolin F, Kudritzki RP, Tonry JL, Huber ME, Rest A, Pastorello A, Tomasella L, Cappellaro E, Benetti S, Mattila S, Kankare E, Kangas T, Leloudas G, Sollerman J, Taddia F, Berger E, Chornock R, Narayan G, Stubbs CW, Foley RJ, Lunnan R, Soderberg A, Sanders N, Milisavljevic D, Margutti R, Kirshner RP, Elias-Rosa N, Morales-Garoffolo A, Taubenberger S, Botticella MT, Gezari S, Urata Y, Rodney S, Riess AG, Scolnic D, Wood-Vasey WM, Burgett WS, Chambers K, Flewelling HA, Magnier EA, Kaiser N, Metcalfe N, Morgan J, Price PA, Sweeney W, Waters C. Nicholl M, et al. Nature. 2016 Nov 24;539(7630):598. doi: 10.1038/nature19850. Epub 2016 Oct 5. Nature. 2016. PMID: 27706143 No abstract available.

Abstract

Super-luminous supernovae that radiate more than 10(44) ergs per second at their peak luminosity have recently been discovered in faint galaxies at redshifts of 0.1-4. Some evolve slowly, resembling models of 'pair-instability' supernovae. Such models involve stars with original masses 140-260 times that of the Sun that now have carbon-oxygen cores of 65-130 solar masses. In these stars, the photons that prevent gravitational collapse are converted to electron-positron pairs, causing rapid contraction and thermonuclear explosions. Many solar masses of (56)Ni are synthesized; this isotope decays to (56)Fe via (56)Co, powering bright light curves. Such massive progenitors are expected to have formed from metal-poor gas in the early Universe. Recently, supernova 2007bi in a galaxy at redshift 0.127 (about 12 billion years after the Big Bang) with a metallicity one-third that of the Sun was observed to look like a fading pair-instability supernova. Here we report observations of two slow-to-fade super-luminous supernovae that show relatively fast rise times and blue colours, which are incompatible with pair-instability models. Their late-time light-curve and spectral similarities to supernova 2007bi call the nature of that event into question. Our early spectra closely resemble typical fast-declining super-luminous supernovae, which are not powered by radioactivity. Modelling our observations with 10-16 solar masses of magnetar-energized ejecta demonstrates the possibility of a common explosion mechanism. The lack of unambiguous nearby pair-instability events suggests that their local rate of occurrence is less than 6 × 10(-6) times that of the core-collapse rate.

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  • Corrigendum: Slowly fading super-luminous supernovae that are not pair-instability explosions.
    Nicholl M, Smartt SJ, Jerkstrand A, Inserra C, McCrum M, Kotak R, Fraser M, Wright D, Chen TW, Smith K, Young DR, Sim SA, Valenti S, Howell DA, Bresolin F, Kudritzki RP, Tonry JL, Huber ME, Rest A, Pastorello A, Tomasella L, Cappellaro E, Benetti S, Mattila S, Kankare E, Kangas T, Leloudas G, Sollerman J, Taddia F, Berger E, Chornock R, Narayan G, Stubbs CW, Foley RJ, Lunnan R, Soderberg A, Sanders N, Milisavljevic D, Margutti R, Kirshner RP, Elias-Rosa N, Morales-Garoffolo A, Taubenberger S, Botticella MT, Gezari S, Urata Y, Rodney S, Riess AG, Scolnic D, Wood-Vasey WM, Burgett WS, Chambers K, Flewelling HA, Magnier EA, Kaiser N, Metcalfe N, Morgan J, Price PA, Sweeney W, Waters C. Nicholl M, et al. Nature. 2016 Nov 24;539(7630):598. doi: 10.1038/nature19850. Epub 2016 Oct 5. Nature. 2016. PMID: 27706143 No abstract available.
  • A large-scale dynamo and magnetoturbulence in rapidly rotating core-collapse supernovae.
    Mösta P, Ott CD, Radice D, Roberts LF, Schnetter E, Haas R. Mösta P, et al. Nature. 2015 Dec 17;528(7582):376-9. doi: 10.1038/nature15755. Epub 2015 Nov 30. Nature. 2015. PMID: 26618868
  • Astrophysics: Super-luminous supernovae on the rise.
    Kasen D. Kasen D. Nature. 2013 Oct 17;502(7471):310-2. doi: 10.1038/502310a. Nature. 2013. PMID: 24132286 No abstract available.

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