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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku Observation of the Radio Halo Cluster Abell 2319: Gas Dynamics and Hard X-Ray Properties
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Suzaku Observation of the Radio Halo Cluster Abell 2319: Gas Dynamics and Hard X-Ray Properties

机译：朱雀无线电晕群Abell 2319的观测：气体动力学和硬X射线特性

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WepresenttheresultsofaSuzakuobservationoftheradiohaloclusterAbell2319(A2319).Themetalabundanceinthecentralcoolregionisfoundtobehigherthanthesurroundingregion,whichwasnotresolvedinformerstudies.Weconfirmthattheline-of-sightvelocitiesoftheintraclustermediumintheobservedregionareconsistentwiththoseofthemembergalaxiesoftheentireA2319andA2319Asubgroupforthefirsttime,thoughnovelocitydifferencewithintheregionhasbeendetected.Ontheotherhand,wehavenotfoundanysignsofgasmotionrelevanttotheA2319Bsubgroup.HardX-rayemissionfromtheclusterhasclearlybeendetected,butitsspectrumislikelytobethermal.Assumingasimplesingle-temperaturemodelforthethermalcomponent,wefindthattheupperlimitofthenon-thermalinverseComptoncomponentbecomes2.6$$ imes$$10$$^{-11}$$ergs$$^{-1}$$cm$$^{-2}$$inthe10a€“40keVband,whichmeansthatthelowerlimitofthemagneticfieldis0.19$$mu$$Gwitharadiospectralindexof0.92.Althoughtheresultsslightlydependonthedetailedspectralmodeling,itisrobustthattheupperlimitofthepower-lawcomponentfluxandlowerlimitofthemagneticfieldstrengthbecome$$sim$$3$$ imes$$10$$^{-11}$$ergs$$^{-1}$$cm$$^{-2}$$and$$sim$$0.2$$mu$$G,respectively.Consideringthelackofasignificantamountofveryhot($$sim$$20keV)gasandthestrongbulkflowmotion,itismorelikelythattherelativisticnon-thermalelectronsresponsiblefortheradiohaloareacceleratedthroughintraclusterturbulenceratherthanshocks.
机译：WepresenttheresultsofaSuzakuobservationoftheradiohaloclusterAbell2319（A2319）.Themetalabundanceinthecentralcoolregionisfoundtobehigherthanthesurroundingregion，whichwasnotresolvedinformerstudies.Weconfirmthattheline-的-sightvelocitiesoftheintraclustermediumintheobservedregionareconsistentwiththoseofthemembergalaxiesoftheentireA2319andA2319Asubgroupforthefirsttime，thoughnovelocitydifferencewithintheregionhasbeendetected.Ontheotherhand，wehavenotfoundanysignsofgasmotionrelevanttotheA2319Bsubgroup.HardX-rayemissionfromtheclusterhasclearlybeendetected，butitsspectrumislikelytobethermal.Assumingasimplesingle-temperaturemodelforthethermalcomponent，wefindthattheupperlimitofthenon-thermalinverseComptoncomponentbecomes2.6 $$的IME $$ 10 $$ ^ { - 11} $$ ergs $$ ^ {-1} $$ cm $$ ^ {-2} $$在10ke“ 40keV波段”中，这意味着磁场的下限为0.19 $ mu $$ G，其光谱指数为0.92。的磁场强度变成$$ sim $$ 3 $$ imes $$ 10 $$ ^ {-11} $$ ergs $$ ^ {-1} $$ cm $$ {{-2} $$ and $$ sim $$ 0.2 $ mu $考虑到大量的极热气体（$ sim $ 20keV）的缺乏和大量气流的流动，更可能是通过负离子湍流而不是震荡加速了对放射性卤代负责的热电非热电子。

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