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arXiv 2205.03319astro-ph.HEastro-ph.SR
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低质量超新星祖先的波驱动爆发和变率

Wave-driven outbursts and variability of low-mass supernova progenitors

Samantha Wu, Jim Fuller

摘要:

在相当数量的核心坍缩超新星中,早期的相互作用表明可能由祖星爆发产生的致密星周介质(CSM)。波驱动的质量损失是产生这些特征的可能机制,先前的工作表明这种机制对于低质量($ \sim \! 11 \, M_\odot$)SN祖细胞是最有效的。使用一维流体动力学模拟与MESA,我们研究了这种波加热的质量$M_{\rm ZAMS} = 10-13\, M_{\odot}$ SN祖细胞的影响。这个范围包括经历半简并、中心氖燃烧和更简并、偏离中心氖点火的恒星。我们发现,中央Ne点火在$M_{\rm ZAMS} = 11\, M_{\odot}$产生一个强烈的波加热,传输$\sim10^{47}$尔格的能量在核心崩溃前$10$年,而其他群众经历较小的波加热水平。在我们的任何模型中,波浪加热都不会在流体动力学上驱动质量损失,并且不太可能自行产生非常大的CSM。然而,波加热可以导致大的径向膨胀(超过一个数量级),光球冷却,亮度增亮高达$\sim 10^6\, L_{\odot}$在氢缺乏的剥离恒星模型。一些Ib/c型的祖细胞在生命的最后几年可以彻底改变它们的外观,视觉波段的亮度增加了近3个马格西。此外,与近距离伴星的相互作用可能会导致强烈的质量损失,这对Ibn型和其他相互作用驱动的SNe有影响。

英文摘要:

In a substantial number of core-collapse supernovae, early-time interaction indicates a dense circumstellar medium (CSM) that may be produced by outbursts from the progenitor star. Wave-driven mass loss is a possible mechanism to produce these signatures, with previous work suggesting this mechanism is most effective for low mass ($ \sim \! 11 \, M_\odot$) SN progenitors. Using one-dimensional hydrodynamic simulations with MESA, we study the effects of this wave heating in SN progenitors of masses $M_{\rm ZAMS} = 10-13\, M_{\odot}$. This range encompasses stars that experience semi-degenerate, central neon burning and more degenerate, off-center neon ignition. We find that central Ne ignition at $M_{\rm ZAMS} = 11\, M_{\odot}$ produces a burst of intense wave heating that transmits $\sim10^{47}$ erg of energy at $10$ years before core collapse, whereas other masses experience smaller levels of wave heating. Wave heating does not hydrodynamically drive mass loss in any of our models and is unlikely to produce a very massive CSM on its own. However, wave heating can cause large radial expansion (by more than an order of magnitude), photospheric cooling, and luminosity brightening by up to $\sim 10^6\, L_{\odot}$ in hydrogen-poor stripped star models. Some type Ib/c progenitors could drastically change their appearance in the final years of their lives, with brightness in visual bands increasing by nearly 3 mags. Moreover, interaction with a close binary companion could drive intense mass loss, with implications for type Ibn and other interaction-powered SNe.

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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