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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >The role of the inner disk in mass accretion to the star in the early phase of star formation
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The role of the inner disk in mass accretion to the star in the early phase of star formation

机译：在恒星形成的早期阶段，内盘在质量吸收中的作用

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AphysicalmechanismthatdrivesFUOrionis-typeoutburstsisreconsidered.Westudytheeffectoftheinnerpartofacircumstellardiskcoveringaregionfromnearthecentralstartoaradiusofapproximately5a€‰au(hereafter,theinnerdisk).Usingthefluctuatingmassaccretionrateontotheinnerdisk$$dot{M},_{ mout}$$,weconsidertheviscousevolutionoftheinnerdiskandthetimevariabilityofthemassaccretionrateontothecentralstar$$dot{M},_{ min}$$bymeansofnumericalcalculationofanunsteadyviscousaccretiondiskinaone-dimensionalaxisymmetricmodel.First,wecalculatetheevolutionoftheinnerdiskassuminganoscillating$$dot{M},_{ mout}$$.Itisshownthatthetimevariabilityof$$dot{M},_{ min}$$doesnotcoincidewith$$dot{M},_{ mout}$$duetoviscousdiffusion.Second,weinvestigatethepropertiesofspontaneousoutburstswithtemporallyconstant$$dot{M},_{ mout}$$.Outburstsoccuronlyinalimitedrangeofmassaccretionratesontotheinnerdiskof$$10^{-10}dot{M},_{ mout}3 imes10^{-6}{,M}_{odot}:$$yra?’1duetothegravo-magnetolimitcycle(GML).Finally,wediscussthecasewithacombinationofepisodic$$dot{M},_{ mout}$$andaccretionoutburstscausedbytheGMLintheinnerdisk.TheGMLcandriveaccretionoutburstsontothestarevenforthecaseoffluctuating$$dot{M},_{ mout}$$,althoughfluctuationsof$$dot{M},$$decaywhiletransmittingtheinnerdiskinwards.Wehavenewlyidentifiedtwomodesofoutburst,onespontaneousandonestimulated.Inthestimulatedmodeofoutburst,$$dot{M},_{ mout}$$doesappeardirectlyin$$dot{M},_{ min}$$(thelatterdefiningthestellaraccretionluminosity).Inthespontaneousmodeofoutburst,$$dot{M},_{ mout}$$appearsastheintervalbetweenoutbursts.
机译：AphysicalmechanismthatdrivesFUOrionis-typeoutburstsisreconsidered.Westudytheeffectoftheinnerpartofacircumstellardiskcoveringaregionfromnearthecentralstartoaradiusofapproximately5a€‰AU（以下，theinnerdisk）.Usingthefluctuatingmassaccretionrateontotheinnerdisk $$点{M}，_ {MOUT} $$，weconsidertheviscousevolutionoftheinnerdiskandthetimevariabilityofthemassaccretionrateontothecentralstar $$点{M}，_ {分钟} $$ bymeansofnumericalcalculationofanunsteadyviscousaccretiondiskinaone-dimensionalaxisymmetricmodel.First，wecalculatetheevolutionoftheinnerdiskassuminganoscillating $ dot {M}，_ {mout} $$。这表明$$ dot {M}，_ {min} $$的时间变异性与$$ dot {M}，_ {mout} $$ duetoviscousdiffusion不一致。 {M}，_ {mout} $$。仅在$ 10的内盘上以一定范围的质量聚集速率爆发$ {^-10} dot {M}，_ {mout} 3 imes10 ^ {-6} {，M} _ {odot}：$$ yra？'1是由于重力磁极限循环（GML）。最后，我们结合使用ionofepisodic $$ dot {M}，_ {mout} $$和内层磁盘中的GML引起的积聚爆发。GML可以驱动累积的爆发到星号上，即使这种情况仍可能使$$ dot {M}，_ {mout} $$波动。 $ dot {M}，_ {mout} $$会直接出现在$$ dot {M}，_ {min} $$（thelatteringthestellaraccretiontion光度）中。在自发爆发模式中，$$ dot {M}，_ {mout} $$出现在爆发之间的间隔。

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