Relativistic jet activity from the tidal disruption of a star by a massive black hole

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题名:	Relativistic jet activity from the tidal disruption of a star by a massive black hole
作者:	Burrows,DN;Kennea,JA;Ghisellini,G;Mangano,V;Zhang,B;Page,KL;Eracleous,M;Romano,P;Sakamoto,T;Falcone,AD;Osborne,JP;Campana,S;Beardmore,AP;Breeveld,AA;Chester,MM;Corbet,R;Covino,S;Cummings,JR;Avanzo,P;Elia,V;Esposito,P;Evans,PA;Fugazza,D;Gelbord,JM;Hiroi,K;Holland,ST;Huang,KY;Im,M;Israel,G;Jeon,Y;Jeon,YB;Jun,HD;Kawai,N;Kim,JH;Krimm,HA;Marshall,FE;Meszaros,P;Negoro,H;Omodei,N;Park,WK;Perkins,JS;Sugizaki,M;Sung,HI;Tagliaferri,G;Troja,E;Ueda,Y;Urata,Y;Usui,R;Antonelli,LA;Barthelmy,SD;Cusumano,G;Giommi,P;Melandri,A;Perri,M;Racusin,JL;Sbarufatti,B;Siegel,MH;Gehrels,N
贡献者:	天文研究所
关键词:	X-RAY OUTBURSTS;SWIFT;EVENTS;FLARES;TELESCOPE;NUCLEUS;MISSION;GALAXY;GRBS
日期:	2011
上传时间:	2012-03-27 18:12:48 (UTC+8)
出版者:	國立中央大學
摘要:	Supermassive black holes have powerful gravitational fields with strong gradients that can destroy stars that get too close(1,2), producing a bright flare in ultraviolet and X-ray spectral regions from stellar debris that forms an accretion disk around the black hole(3-7). The aftermath of this process may have been seen several times over the past two decades in the form of sparsely sampled, slowly fading emission from distant galaxies(8-14), but the onset of the stellar disruption event has not hitherto been observed. Here we report observations of a bright X-ray flare from the extragalactic transient Swift J164449.3+573451. This source increased in brightness in the X-ray band by a factor of at least 10,000 since 1990 and by a factor of at least 100 since early 2010. We conclude that we have captured the onset of relativistic jet activity from a supermassive black hole. A companion paper(15) comes to similar conclusions on the basis of radio observations. This event is probably due to the tidal disruption of a star falling into a supermassive black hole, but the detailed behaviour differs from current theoretical models of such events.
關聯:	NATURE
显示于类别:	[天文研究所] 期刊論文

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