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arXiv 2302.04890astro-ph.HEastro-ph.SR
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力爆炸条件与球对称核心坍缩超新星(CCSN)爆炸一致

The Force Explosion Condition is Consistent with Spherically Symmetric CCSN Explosions

Mariam Gogilashvili, Jeremiah W. Murphy, Evan P. O'Connor

AI总结:

本研究通过对解析力爆炸条件(FEC)的物理参数做实用小幅修正,验证了其与采用真实中微子输运的球对称核心坍缩超新星模拟的爆炸条件一致,推进了CCSN爆炸预测理论研究。

摘要:

核心坍缩超新星(CCSN)理论的主要挑战之一是预测哪些恒星会发生爆炸,哪些会坍缩为黑洞。Gogilashvili和Murphy(2022)推导了一个解析力爆炸条件(FEC),并证明该FEC与采用中微子加热和冷却的灯泡近似的CCSN模拟结果一致。在这篇后续研究论文中,我们证明在GR1D模拟(O'CONNOR 2015)中使用真实中微子输运时,FEC与爆炸条件一致。由于大多数一维模拟不会发生爆炸,为便于开展这项检验,我们提升了增益区内的加热效率。为对比解析FEC与辐射流体动力学模拟,本文还给出了物理参数的实用转换方法。例如:我们用增益区内的净中微子加热量替换增益区内沉积的中微子功率$L_ντ_g$;我们不假设质量吸积率$\text{Ṁ}$处处相同,而是计算增益区内的$\text{Ṁ}$;同时我们采用增益半径处的中微子不透明度。通过小幅但实用的修正,我们证明FEC能够预测采用中微子输运的球对称CCSN模拟中的爆炸条件。

英文摘要:

One of the major challenges in Core-collapse Supernova (CCSN) theory is to predict which stars explode and which collapse to black holes. Gogilashvili and Murphy (2022) derived an analytic force explosion condition (FEC) and showed that the FEC is consistent with CCSN simulations that use the light-bulb approximation for neutrino heating and cooling. In this follow-up manuscript, we show that the FEC is consistent with the explosion condition when using actual neutrino transport in GR1D simulations (O'CONNOR 2015). Since most 1D simulations do not explode, to facilitate this test, we enhance the heating efficiency within the gain region. To compare the analytic FEC and radiation-hydrodynamic simulations, this manuscript also presents a practical translation of the physical parameters. For example: we replace the neutrino power deposited in the gain region, $L_ντ_g$, with the net neutrino heating in the gain region; rather than assuming that $\dot{M}$ is the same everywhere, we calculate $\dot{M}$ within the gain region; and we use the neutrino opacity at the gain radius. With small, yet practical modifications, we show that the FEC predicts the explosion conditions in spherically symmetric CCSN simulations that use neutrino transport.

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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