A novel explosive process is required for the gamma-ray burst GRB 060614

A Gal-Yam, D B Fox, P A Price, E O Ofek, M R Davis, D C Leonard, Alicia M Soderberg, Brian Paul Schmidt, Karen Michelle Lewis, Bruce A Peterson, Shrinivas R Kulkarni, E Berger, S B Cenko, Re'em Sari, K Sharon, Dale A Frail, D S Moon, P J Brown, Antonino Cucchiara, Fiona HarrisonTsvi Piran, S E Persson, Patrick J McCarthy, Bryan E Penprase, Roger A Chevalier, Andrew I MacFadyen

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277 Citations (Scopus)

Abstract

Over the past decade, our physical understanding of gamma-ray bursts (GRBs) has progressed rapidly, thanks to the discovery and observation of their long-lived afterglow emission. Long-duration (greater than or similar to 2 s) GRBs are associated with the explosive deaths of massive stars ( collapsars , ref. 1), which produce accompanying supernovae(2-5); the short- duration (less than or similar to 2 s) GRBs have a different origin, which has been argued to be the merger of two compact objects(6-9). Here we report optical observations of GRB 060614 (duration 100 s, ref. 10) that rule out the presence of an associated supernova. This would seem to require a new explosive process: either a massive collapsar that powers a GRB without any associated supernova, or a new type of engine , as long-lived as the collapsar but without a massive star. We also show that the properties of the host galaxy (redshift z = 0.125) distinguish it from other long-duration GRB hosts and suggest that an entirely new type of GRB progenitor may be required.
Original languageEnglish
Pages (from-to)1053 - 1055
Number of pages3
JournalNature
Volume444
Issue number7122
Publication statusPublished - 2006
Externally publishedYes

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