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首页> 外文期刊>The Astrophysical journal >Hydrodynamic Models of Line-driven Accretion Disk Winds. II. Adiabatic Winds from Nonisothermal Disks
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Hydrodynamic Models of Line-driven Accretion Disk Winds. II. Adiabatic Winds from Nonisothermal Disks

机译:线驱动吸积盘风的流体动力学模型。二。非等温圆盘的绝热风

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We present here numerical hydrodynamic simulations of line-driven accretion disk winds in cataclysmic variable systems. We calculate wind mass-loss rate, terminal velocities, and line profiles for C IV (1550 ?) for various viewing angles. The models are 2.5-dimensional, include an energy balance condition, and calculate the radiation field as a function of position near an optically thick accretion disk. The model results show that centrifugal forces produce collisions of streamlines in the disk wind that in turn generate an enhanced density region, underlining the necessity of two-dimensional calculations where these forces may be represented. For disk luminosity Ldisk = L☉, white dwarf mass Mwd = 0.6 M☉, and white dwarf radii Rwd = 0.01 R☉, we obtain a wind mass-loss rate of wind = 8 × 10-12 M☉ yr-1, and a terminal velocity of ~3000 km s-1. The line profiles we obtain are consistent with observations in their general form, in particular in the maximum absorption at roughly half the terminal velocity for the blueshifted component, in the magnitudes of the wind velocities implied by the absorption components, in the FWHM of the emission components, and in the strong dependence in inclination angle.
机译:在此,我们介绍了催化变量系统中线驱动吸积盘风的数值流体动力学模拟。我们计算了各种视角下C IV(1550?)的风量损失率,终端速度和线形。这些模型为2.5维模型,包括能量平衡条件,并根据光学厚度厚的吸积盘附近的位置来计算辐射场。模型结果表明,离心力在圆盘风中产生流线碰撞,进而产生一个增强的密度区域,从而强调了可以表示这些力的二维计算的必要性。对于圆盘亮度Ldisk =L☉,白矮星质量Mwd = 0.6M☉,白矮星半径Rwd = 0.01R☉,我们得到风的风量损失率= 8×10-12M☉yr-1,并且终端速度约为3000 km s-1。我们获得的线轮廓与它们的一般形式的观测结果一致,特别是在蓝移分量的最终速度的大约一半处的最大吸收,在发射的FWHM中,由吸收分量隐含的风速大小组件,并在很大程度上依赖于倾斜角度。

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