Source:http://linkedlifedata.com/resource/pubmed/id/15858565
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
7037
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| pubmed:dateCreated |
2005-4-28
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| pubmed:abstractText |
Soft-gamma-ray repeaters (SGRs) are galactic X-ray stars that emit numerous short-duration (about 0.1 s) bursts of hard X-rays during sporadic active periods. They are thought to be magnetars: strongly magnetized neutron stars with emissions powered by the dissipation of magnetic energy. Here we report the detection of a long (380 s) giant flare from SGR 1806-20, which was much more luminous than any previous transient event observed in our Galaxy. (In the first 0.2 s, the flare released as much energy as the Sun radiates in a quarter of a million years.) Its power can be explained by a catastrophic instability involving global crust failure and magnetic reconnection on a magnetar, with possible large-scale untwisting of magnetic field lines outside the star. From a great distance this event would appear to be a short-duration, hard-spectrum cosmic gamma-ray burst. At least a significant fraction of the mysterious short-duration gamma-ray bursts may therefore come from extragalactic magnetars.
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| pubmed:commentsCorrections | |
| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Apr
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| pubmed:issn |
1476-4687
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| pubmed:author |
pubmed-author:BoggsS ESE,
pubmed-author:BoyntonWW,
pubmed-author:ClineTT,
pubmed-author:DuncanR CRC,
pubmed-author:FellowsCC,
pubmed-author:HajdasWW,
pubmed-author:HudsonHH,
pubmed-author:HurfordGG,
pubmed-author:HurleyKK,
pubmed-author:KruckerSS,
pubmed-author:LichteCC,
pubmed-author:LieKK,
pubmed-author:MitrofanovII,
pubmed-author:RayMM,
pubmed-author:SaninAA,
pubmed-author:SmithD MDM,
pubmed-author:ThompsonCC,
pubmed-author:WiggerCC,
pubmed-author:ZoglauerAA,
pubmed-author:von KienlinAA
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| pubmed:issnType |
Electronic
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| pubmed:day |
28
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| pubmed:volume |
434
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| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
1098-103
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| pubmed:year |
2005
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| pubmed:articleTitle |
An exceptionally bright flare from SGR 1806-20 and the origins of short-duration gamma-ray bursts.
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| pubmed:affiliation |
UC Berkeley Space Sciences Laboratory, Berkeley, California 94720-7450, USA. khurley@ssl.berkeley.edu
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| pubmed:publicationType |
Journal Article
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