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arXiv 0901.1976astro-ph.GA
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星系外流和矮星系的化学演化

Galactic outflows and the chemical evolution of dwarf galaxies

Simone Recchi, Gerhard Hensler, Dalila Anelli

摘要:

矮星系中的星系风是由超新星爆炸释放的能量驱动的,恒星形成后的恒星风产生了一个超压的热气腔。虽然恒星形成阶段的光度和星系的质量在决定星系风的发生和新产生的金属的命运方面起着关键作用,但其他参数也起着同样重要的作用。在这方面的贡献,我们解决了以下问题:(一)什么是超级气泡的后期演变和超级气泡腔的最终命运是什么?(ii)ISM的多相性,特别是热气体与嵌入云的共存,如何影响星系风的发展?(iii)星系的扁平化和两极星系风的发展之间有什么关系?

英文摘要:

Galactic winds in dwarf galaxies are driven by the energy released by supernova explosions and stellar winds following an intense episode of star formation, which create an over-pressured cavity of hot gas. Although the luminosity of the star formation episode and the mass of the galaxy play a key role in determining the occurrence of the galactic winds and the fate of the freshly produced metals, other parameters play an equally important role. In this contribution we address the following questions (i) What is the late evolution of superbubbles and what is the final fate of the superbubble cavities? (ii) How does the multi-phase nature of the ISM, in particular the coexistence of hot gas with embedded clouds, affect the development of galactic winds? (iii) What is the relation between the flattening of a galaxy and the development of bipolar galactic winds?

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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