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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Spiral Structures and Shocks in Accretion Discs in Close Binary Systems: the Role of the Injection Velocity at the Inner Lagrangian Point
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Spiral Structures and Shocks in Accretion Discs in Close Binary Systems: the Role of the Injection Velocity at the Inner Lagrangian Point

机译：紧密二元系统中吸积盘的螺旋结构和冲击：内拉格朗日点处注入速度的作用

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Inourpreviouspaper(Lanzafameetal.2000,PASJ52,515)weshowed,through2DSPHsimulations,thatthestellarmassratio,$$M_{2}/M_{1}$$,ofaclosebinarysystem(thatdeterminesthe$$L_{1}$$positionandthentheinitialspecificangularmomentumat$$L_{1}$$)playsafundamentalroleintheformationanddevelopmentofspiralstructuresandshockfrontsintheradialflowofaccretiondiscs.Inthatworkonlyaquasi-sonicvalueoftheinjectionvelocityat$$L_{1}$$wasconsidered.Inthepresentworkwealsocarriedout2DSPHsimulationswiththeaimtoinvestigatethedevelopmentofsuchstructures,whilekeepingconstantthemassofthecompactprimary($$M_{1}=1M_odot$$)andtheseparationbetweenthetwocomponents,andassumingasaninitialconditionoftwodifferentsupersonicinjectionvelocitiesat$$L_{1}$$,characterizingtwosetsofsimulations.Foreachsetweconsideredfourvaluesofthesecondarytoprimarymassratio,$$M_{2}/M_{1}$$.Weworkedout2Dmodelsbecausethedampingeffectoftheartificialviscosityistoostrongin3D.Furthermore,the2Denvironmentseemstobethemostsuitableinordertobeevidenceofshockfrontsinhighlycompressiblegases.Ouraiminthesetwoworkswastoenhancetheinitialkinematicconditions(fromsonictostronglysupersonic)tostresstheideathatspiralstructuresandshockfrontdevelopmentareinfluencedbytheinitialspecificangularmomentumat$$L_{1}$$.Theresultsshowthatthesestructuresaremoreevidentwiththeincreasinginjectionvelocityat$$L_{1}$$andtheincreasing$$L_{1}$$distancefromtheprimary.
机译：在我们之前的论文（Lanzafameetal.2000，PASJ52,515）中，我们通过2 DSPH模拟显示了二进制系统的$ M_ {2} / M_ {1} $$（确定$$ L_ {1} $$的位置，然后初始化了特定的$$ L_momentum $ {$} ）playsafundamentalroleintheformationanddevelopmentofspiralstructuresandshockfrontsintheradialflowofaccretiondiscs.Inthatworkonlyaquasi-sonicvalueoftheinjectionvelocityat $$ L_ {1} $$ wasconsidered.Inthepresentworkwealsocarriedout2DSPHsimulationswiththeaimtoinvestigatethedevelopmentofsuchstructures，whilekeepingconstantthemassofthecompactprimary（$$ M_ {1} = 1M_odot $$）andtheseparationbetweenthetwocomponents，andassumingasaninitialconditionoftwodifferentsupersonicinjectionvelocitiesat $$ L_ {1} $$，characterizingtwosetsofsimulations.Foreachsetweconsideredfourvaluesofthesecondarytoprimarymassratio，$$ M_ {2} / M_ {1} $$。我们设计出了2D模型，因为3D上的人造粘滞性具有阻尼效应。我们所有的这两个工作都通过提高初始线性运动条件（从音速到强超音速）来强调螺旋结构和冲击波前发展的想法，这是由于初始特定的角动量在$ L_ {1} $$的作用下得到的。结果表明，随着费用的增加{L} $$ 1 }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}。

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