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A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst

Greiner, J and Mazzali, PA and Kann, DA and Kruehler, T and Pian, E and Prentice, SJ and Felipe Olivares, E and Rossi, A and Klose, S and Taubenberger, S and Knust, F and Afonso, PMJ and Ashall, C and Bolmer, J and Delvaux, C and Diehl, R and Elliott, J and Filgas, R and Fynbo, JPU and Graham, JF and Guelbenzu, AN and Kobayashi, S and Leloudas, G and Savaglio, S and Schady, P and Schmidl, S and Schweyer, T and Sudilovsky, V and Tanga, M and Updike, AC and van Eerten, H and Varela, K (2015) A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst. NATURE, 523 (7559). pp. 189-192. ISSN 0028-0836

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Abstract

A new class of ultra-long duration (>10,000 s) gamma-ray bursts has recently been suggested1,2,3. They may originate in the explosion of stars with much larger radii than normal long gamma-ray bursts3,4 or in the tidal disruptions of a star3. No clear supernova had yet been associated with an ultra-long gamma-ray burst. Here we report that a supernova (2011kl) was associated with the ultra-long duration burst 111209A, at z=0.677. This supernova is more than 3 times more luminous than type Ic supernovae associated with long gamma-ray bursts5,6,7, and its spectrum is distinctly different. The continuum slope resembles those of super-luminous supernovae8,9, but extends farther down into the rest-frame ultra-violet implying a low metal content. The light curve evolves much more rapidly than super-luminous supernovae. The combination of high luminosity and low metal-line opacity cannot be reconciled with typical type Ic supernovae, but can be reproduced by a model where extra energy is injected by a strongly magnetized neutron star (a magnetar), which has also been proposed as the explanation for super-luminous supernovae20,20a.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: NATURE PUBLISHING GROUP
Related URLs:
Date Deposited: 07 Dec 2015 08:25
Last Modified: 09 Jan 2016 00:50
DOI or Identification number: doi.org/10.1038/nature14579
URI: http://researchonline.ljmu.ac.uk/id/eprint/2436

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