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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >A new X-ray nova MAXIa€‰a€‰J1910a?’057 (=a€‰Swifta€‰a€‰J1910.2a?’0546) and mass accretion inflow
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A new X-ray nova MAXIa€‰a€‰J1910a?’057 (=a€‰Swifta€‰a€‰J1910.2a?’0546) and mass accretion inflow

机译：一种新的X射线新星MAXIa J1910a？057（= Swifta€J1910.2a？0546）和质量增加流入

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Wereportonlong-termmonitoringofanewlydiscoveredX-raynova,MAXIa€‰a€‰J1910a?’057(=a€‰Swifta€‰a€‰J1910.2a?’0546)byMAXIandSwift.ThenewX-raytransientwasfirstdetectedon2012May31bytheMAXIGasSlitCamera(GSC)andtheSwiftBurstAlertTelescope(BAT)almostsimultaneously.WeanalyzedX-rayandUVdatafor270a€‰dfollowingtheoutburstonsettakenbyrepeatedMAXIscansandSwiftpointingobservations.TheobtainedX-raylightcurvefortheinital90a€‰disroughlyrepresentedbyafast-riseandexponential-decayprofile.However,itre-brightenedat??a??a€‰110a€‰daftertheonsetandfinallywentdownbelowbothGSCandBATdetectionlimitsafter240a€‰d.AlltheX-rayenergyspectraarefittedwellwithamodelconsistingofamulti-color-diskblackbodyanditsComptonizedhardtail.Duringthesoft-stateperiods,theinner-diskradiusofthebest-fitmodelwasalmostconstant.Iftheradiusrepresentstheinnermoststablecircularorbitofanon-spinningblackholeandthesoft-to-hardtransitionsoccurat1%a€“4%oftheEddingtonluminosity,themassofthecompactobjectisestimatedtobe??a€‰2.9a€‰Ma??andthedistancetobe??a€‰1.70a€‰kpc.Theinner-diskradiusbecamelargerinthehard/hard-intermediatestate.Thissuggeststhattheaccretiondiskwouldbetruncated.WedetectedanexcessoftheUVfluxoverthediskblackbodycomponentextrapolatedfromtheX-raydata,whichcanbemodeledasreprocessedemissionirradiatedbytheinnerdisk.WealsofoundthattheUVlightcurvemostlytracedtheX-raycurve,butashortdippingeventwasobservedinboththeUVandtheX-raybandswitha3.5??dX-raytimelag.ThiscanbeinterpretedastheradialinflowofaccretingmatterfromtheouterUVregiontotheinnerX-rayregion.
机译：我们报告了对新发现的X射线新星进行长期监测的情况，MAXIa和Swift迅速发现了MAXIa J1910a？'057（= Swifta€J1910.2a？'0546）。新的X射线瞬态最早是在2012年5月31日由MAXIGasSwatelySeleant镜头（GSC）检测到的。 rayandUVdatafor270a€‰dfollowingtheoutburstonsettakenbyrepeatedMAXIscansandSwiftpointingobservations.TheobtainedX-raylightcurvefortheinital90a€‰disroughlyrepresentedbyafast-riseandexponential-decayprofile.However，itre-brightenedat ??一个??一个€‰110A€‰daftertheonsetandfinallywentdownbelowbothGSCandBATdetectionlimitsafter240a€‰d.AlltheX-rayenergyspectraarefittedwellwithamodelconsistingofamulti滤色diskblackbodyanditsComptonizedhardtail.Duringthesoft-stateperiods，theinner如果半径表示在一个自旋黑洞中最稳定的圆形轨道，并且软到硬的转变发生在1％到4％的爱丁顿发光度上，那么这些紧凑的物体的质量估计大约为2.9a。 ?? 一种€‰1.70A€‰kpc.Theinner-diskradiusbecamelargerinthehard /硬intermediatestate.Thissuggeststhattheaccretiondiskwouldbetruncated.WedetectedanexcessoftheUVfluxoverthediskblackbodycomponentextrapolatedfromtheX-raydata，whichcanbemodeledasreprocessedemissionirradiatedbytheinnerdisk.WealsofoundthattheUVlightcurvemostlytracedtheX-raycurve，butashortdippingeventwasobservedinboththeUVandtheX-raybandswitha3.5 ?? DX-raytimelag.ThiscanbeinterpretedastheradialinflowofaccretingmatterfromtheouterUVregiontotheinnerX-rayregion。

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