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arXiv 0912.4847astro-ph.GA
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湍流和动力不稳定赫比格-哈罗喷流的物理学

The Physics of turbulent and dynamically unstable Herbig-Haro jets

Lorenzo Zaninetti

摘要:

采用两种湍流射流模型,解释了Herbig-Haro天体的中心线速度、速度的横向分布、质量流和能量流等总体性质。赫比格-哈罗天体的复杂形状,如HH 34中的弧形,可以通过引入不同运动学效应的组合来解释,如沿喷流主方向的速度行为和恒星在星际介质中的速度。在三种不同的情况下,发射线的强度或亮度的行为进行了探讨:横向一维切割,纵向一维切割和二维地图。通过对环面几何特性的仔细分析,给出了一种解析解释,解释了通常由弓形激波模拟的强度或亮度的增强。

英文摘要:

The overall properties of the Herbig-Haro objects such as centerline velocity, transversal profile of velocity, flow of mass and energy are explained adopting two models for the turbulent jet. The complex shapes of the Herbig-Haro objects, such as the arc in HH34 can be explained introducing the combination of different kinematic effects such as velocity behavior along the main direction of the jet and the velocity of the star in the interstellar medium. The behavior of the intensity or brightness of the line of emission is explored in three different cases : transversal 1D cut, longitudinal 1D cut and 2D map. An analytical explanation for the enhancement in intensity or brightness such as usually modeled by the bow shock is given by a careful analysis of the geometrical properties of the torus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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