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An outburst from a massive star 40 days before a supernova explosion.

Abstract：

:Some observations suggest that very massive stars experience extreme mass-loss episodes shortly before they explode as supernovae, as do several models. Establishing a causal connection between these mass-loss episodes and the final explosion would provide a novel way to study pre-supernova massive-star evolution. Here we report observations of a mass-loss event detected 40 days before the explosion of the type IIn supernova SN 2010mc (also known as PTF 10tel). Our photometric and spectroscopic data suggest that this event is a result of an energetic outburst, radiating at least 6 × 10(47) erg of energy and releasing about 10(-2) solar masses of material at typical velocities of 2,000 km s(-1). The temporal proximity of the mass-loss outburst and the supernova explosion implies a causal connection between them. Moreover, we find that the outburst luminosity and velocity are consistent with the predictions of the wave-driven pulsation model, and disfavour alternative suggestions.

journal_name

Nature

journal_title

Nature

authors

Ofek EO,Sullivan M,Cenko SB,Kasliwal MM,Gal-Yam A,Kulkarni SR,Arcavi I,Bildsten L,Bloom JS,Horesh A,Howell DA,Filippenko AV,Laher R,Murray D,Nakar E,Nugent PE,Silverman JM,Shaviv NJ,Surace J,Yaron O

doi

10.1038/nature11877

subject

Has Abstract

pub_date

2013-02-07 00:00:00

pages

65-7

issue

7435

eissn

0028-0836

issn

1476-4687

pii

nature11877

journal_volume

494

pub_type

杂志文章

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