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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
6018
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pubmed:dateCreated |
2011-2-11
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pubmed:abstractText |
The well-known Crab Nebula is at the center of the SN1054 supernova remnant. It consists of a rotationally powered pulsar interacting with a surrounding nebula through a relativistic particle wind. The emissions originating from the pulsar and nebula have been considered to be essentially stable. Here, we report the detection of strong gamma-ray (100 mega-electron volts to 10 giga-electron volts) flares observed by the AGILE satellite in September 2010 and October 2007. In both cases, the total gamma-ray flux increased by a factor of three compared with the non-flaring flux. The flare luminosity and short time scale favor an origin near the pulsar, and we discuss Chandra Observatory x-ray and Hubble Space Telescope optical follow-up observations of the nebula. Our observations challenge standard models of nebular emission and require power-law acceleration by shock-driven plasma wave turbulence within an approximately 1-day time scale.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
1095-9203
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pubmed:author |
pubmed-author:ArgayLL,
pubmed-author:BarbielliniGG,
pubmed-author:BignamiG FGF,
pubmed-author:BulgarelliAA,
pubmed-author:CampanaRR,
pubmed-author:CaraveoPP,
pubmed-author:CattaneoP WPW,
pubmed-author:ChenA WAW,
pubmed-author:ContessiTT,
pubmed-author:CostaEE,
pubmed-author:D'AmmandoFF,
pubmed-author:De LucaAA,
pubmed-author:DePrisGG,
pubmed-author:Del MonteEE,
pubmed-author:Di CoccoGG,
pubmed-author:Di PersioGG,
pubmed-author:DonnarummaII,
pubmed-author:EvangelistaYY,
pubmed-author:FerociMM,
pubmed-author:FerrariAA,
pubmed-author:FerrignoCC,
pubmed-author:FuschinoFF,
pubmed-author:GalliMM,
pubmed-author:GianottiFF,
pubmed-author:GiommiPP,
pubmed-author:GiulianiAA,
pubmed-author:GiustiMM,
pubmed-author:HeinkeC OCO,
pubmed-author:HorneVV,
pubmed-author:LabantiCC,
pubmed-author:LapshovII,
pubmed-author:LazzarottoFF,
pubmed-author:LipariPP,
pubmed-author:LongoFF,
pubmed-author:LucarelliFF,
pubmed-author:MarisaldiMM,
pubmed-author:MereghettiSS,
pubmed-author:MorelliEE,
pubmed-author:MorettiEE,
pubmed-author:MorselliAA,
pubmed-author:PaccianiLL,
pubmed-author:PellizzoniAA,
pubmed-author:PerottiFF,
pubmed-author:PianoGG,
pubmed-author:PicozzaPP,
pubmed-author:PiliaMM,
pubmed-author:PittoriCC,
pubmed-author:PressJJ,
pubmed-author:PucellaGG,
pubmed-author:RapisardaMM,
pubmed-author:RappoldiAA,
pubmed-author:RubiniAA,
pubmed-author:SabatiniSS,
pubmed-author:SalottiLL,
pubmed-author:SantolamazzaPP,
pubmed-author:SoffittaPP,
pubmed-author:StrianiEE,
pubmed-author:TavaniMM,
pubmed-author:TennantAA,
pubmed-author:TrifoglioMM,
pubmed-author:TroisAA,
pubmed-author:VallazzaEE,
pubmed-author:VercelloneSS,
pubmed-author:VerrecchiaFF,
pubmed-author:VittoriniVV,
pubmed-author:WeisskopfM CMC,
pubmed-author:ZambraAA,
pubmed-author:ZanelloDD
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pubmed:issnType |
Electronic
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pubmed:day |
11
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pubmed:volume |
331
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
736-9
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pubmed:year |
2011
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pubmed:articleTitle |
Discovery of powerful gamma-ray flares from the Crab Nebula.
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pubmed:affiliation |
Istituto Nazionale di Astrofisica-Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Roma, via del Fosso del Cavaliere 100, 00133 Roma, Italy. pi.agile@iasf-roma.inaf.it
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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