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arXiv 1208.6437astro-ph.GAastro-ph.HE
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自引力盘中超气泡的演化

Evolution of superbubbles in a self-gravitating disk

L. Zaninetti

摘要:

对超气泡的膨胀过程进行了解析和数值研究。我们的模型实现了薄层近似的密度垂直分布所给出的等温自引力盘。给出了与数值流体力学结果的精确比较。类比绘制与Kompaneets方程,其中包括二次双曲正割法的平面平行分层介质的列表中。一个天体物理学的应用是与两个蠕虫46.4+5.5和39.7+5.7连接的超级气泡。介绍了星系自转对模拟半径和速度的影响。在象理论的框架下解释了在天文地图上可见的具有强烈的肢增亮的蠕虫。

英文摘要:

The expansion of a superbubble is investigated both analytically and numerically. Our model implements the thin layer approximation in a vertical profile of density as given by an isothermal self-gravitating disk. A precise comparison with the results of numerical hydro-dynamics is given. Analogies are drawn with the Kompaneets equation that includes the quadratic hyperbolic-secant law in the list of the plane-parallel stratified media. An astrophysical application is made to the superbubble connected with the two worms 46.4+5.5 and 39.7+5.7. The effects of the rotation of the galaxy on the simulated radius and on the velocity are introduced. The worms with their strong limb-brightening visible on astronomical maps are explained in the framework of image theory.

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