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DISPERSAL OF PROTOPLANETARY DISKS BYWIND STRIPPING

机译:Promoplanetary Disks的分散吹口剥离

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We present a model for the dispersal of protoplanetary disks by winds from either the central star or the inner disk. These winds obliquely strike the flaring disk surface and strip away disk material by entraining it in an outward radial-moving flow at the disk-wind interface. This interface lies several disk scale heights above the mid plane. The disk dispersal time depends on the velocity at which disk material flows into the mixing layer. If this velocity is ~10% of the sound speed, the disk dispersal time at ~1-10 AU is Myr for a 0.01 M_⊙ disk around a solar mass star, with a spherical wind launched from the inner disk or central star with a typical mass loss rate of 10~(-8) Mo yr~(-1) and terminal velocity of v_ω, = 100 km s~(-1). We conclude that wind stripping is not a dominant disk dispersal mechanism compared with viscous accretion and photoevaporation. Nevertheless, wind stripping may affect the evolution of the intermediate disk regions.
机译:我们向中央恒星或内盘的风提出了一个模型的原始磁盘。这些风通过将燃烧盘表面倾斜地倾斜敲击喇叭形盘表面并在盘风接口处的向外径向移动流中剥离磁盘材料。该界面位于中间平面上方的几个磁盘刻度高度。盘分散时间取决于盘材料流入混合层的速度。如果该速度为〜10%的声速,则〜1-10 Au的磁盘分散时间是太阳能颗星周围的0.01m_ν盘的MYR,带有从内盘或中心星的球形风吹带来典型的质量损失率为10〜(-8)Mo Yr〜(-1)和v_ω的末端速度,= 100km s〜(-1)。我们得出结论,与粘性增生和光吸收相比,风剥离不是主导的盘分散机制。然而,风剥离可能会影响中间盘区域的演变。

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