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arXiv 2009.02340astro-ph.SR
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辐射驱动的恒星爆发

Radiation-Driven Stellar Eruptions

Kris Davidson

摘要:

超大质量恒星偶尔会在巨大的喷发中喷出物质,这是由连续辐射压力而不是冲击波驱动的。它们中的一些在总辐射输出方面可以与超新星相媲美,质量损失对随后的演化至关重要。有些是超新星冒名顶替者,包括SN前兆爆发,而另一些则是被早期喷出的物质所掩盖的真正SN事件。发光蓝变星(LBV's)传统上被认为与大爆发有关,尽管这种联系还没有很好地建立起来。经过40年的研究,巨型火山爆发和LBV事件的根本原因仍然难以捉摸。这篇评论概述了基本的相关物理学,并简要总结了重要的观测事实。对不透明出流的光谱和出射辐射温度的原因进行了说明。许多提出的机制指出,在恒星的光球,在其铁不透明度峰值区,并在其中心区域的不稳定性。这里的一些评论和插图在出版的文献中还没有被熟悉。

英文摘要:

Very massive stars occasionally expel material in colossal eruptions, driven by continuum radiation pressure rather than blast waves. Some of them rival supernovae in total radiative output, and the mass loss is crucial for subsequent evolution. Some are supernova impostors, including SN precursor outbursts, while others are true SN events shrouded by material that was ejected earlier. Luminous Blue Variable stars (LBV's) are traditionally cited in relation with giant eruptions, though this connection is not well established. After four decades of research, the fundamental causes of giant eruptions and LBV events remain elusive. This review outlines the basic relevant physics, with a brief summary of essential observational facts. Reasons are described for the spectrum and emergent radiation temperature of an opaque outflow. Many proposed mechanisms are noted for instabilities in the star's photosphere, in its iron opacity peak zones, and in its central region. Some of the remarks and conjectures here have not yet become familiar in the published literature.

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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