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Clumpy Outflows from Supercritical Accretion Flow

机译：超临界吸积流产生的笨拙流出

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Asignificantamountofmatterinsupercritical(orsuper-Eddington)accretionflowisblownawaybyradiationforce,thusformingoutflows;however,thepropertiesofsuchradiation-drivenoutflowshavebeenpoorlyunderstood.Wehaveperformedglobaltwo-dimensionalradiaion-magnetohydrodynamicsimulationsofsupercriticalaccretionflowontoablackholewith10or10$$^{8}M_{odot}$$inalargesimulationboxof514$$r_{ mS} imes514r_{ mS}$$(with$$r_{ mS}$$beingtheSchwarzschildradius).Weconfirmthatuncollimatedoutflowswithvelocitiesof10percentofthespeedoflightemergefromtheinnermostpartoftheaccretionflowatawideangleof10$$^{circ}$$a€“50$$^{circ}$$fromthediskrotationaxis.Importantly,theoutflowsexhibitclumpystructuresaboveheightsof$$sim250r_{ mS}$$.Thetypicalsizeoftheclumpsis$$sim10r_{ mS}$$,whichcorrespondstooneopticaldepth,andtheirshapesareslightlyelongatedalongtheoutflowdirection.Sinceclumpsstarttoforminthelayerabovewhichthe(upward)radiationissuperiorinforcetothe(downward)gravity,theRayleigha€“Taylorinstabilityseemstobeaprimarycause.Inaddition,aradiation-hydrodynamicinstability,whichariseswhenradiationfunnelsthrougharadiation-pressure-supportedatmosphere,mayalsohelptoformclumpsofoneopticaldepth.Amagneticphotonbubbleinstabilitydoesnotseemtobeessential,sinceasimilarclumpyoutflowstructureisobtainedinnonmagneticradiation-hydrodynamicsimulations.Sincethespatialcoveringfactoroftheclumpsisestimatedtobe$$sim$$0.3,andsincetheyaremarginallyopticallythick,theywillexplainatleastsomeoftherapidlightvariationsofactivegalacticnuclei.Wefurtherdiscussapossibilityofproducingbroad-lineregioncloudsbytheclumpyoutflow.
机译：514 514 ina ina 514 514 ina 514 {514重要的是，我们确认从m的$ 250到$ s的旋转速度轴上的$ S的$ S $ {s_ {s}} {s}} {$} {s}} {x} {mS} $$成为Schwarzs子半径）。我们确认未准直的流出的光速是速度的10％。 } $$，对应于一个光学深度，其形状沿流出方向略微拉长。由于团块开始在其上方的向上（向上）辐射力形成向（向下）重力的层，因此Rayleigha“ Taylor不稳定”似乎是首要原因。和灰，aradiation-hydrodynamicinstability，whichariseswhenradiationfunnelsthrougharadiation - 压力 - supportedatmosphere，mayalsohelptoformclumpsofoneopticaldepth.Amagneticphotonbubbleinstabilitydoesnotseemtobeessential，sinceasimilarclumpyoutflowstructureisobtainedinnonmagneticradiation-hydrodynamicsimulations.Sincethespatialcoveringfactoroftheclumpsisestimatedtobe $$ SIM $$ 0.3，andsincetheyaremarginallyopticallythick，theywillexplainatleastsomeoftherapidlightvariationsofactivegalacticnuclei.Wefurtherdiscussapossibilityofproducingbroad-lineregioncloudsbytheclumpyoutflow。

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