Using nebular spectra to reveal the progenitor and explosion mechanism of core-collpase supernovae

利用星云光谱揭示核心塌陷超新星的起源和爆炸机制

• 批准号: 20J23342
• 负责人: 方 其亮
• 金额: $ 1.79万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-24 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20J23342/
• 关键词: Supernvoa; Transient source; Spectroscopy; Spectrum

The relation between the progenitor mass and the kinetic energy of the explosion is a key toward revealing the explosion mechanism of stripped-envelope (SE) core-collapse (CC) supernovae (SNe). In this work, we present a method to derive this relation using the nebular spectra of SESNe, based on the correlation between [O I]/[Ca II], which measures the progenitor mass, and [O I] width, which measures the expansion velocity of the ejecta. Using hydrodynamic simulations, we trigger explosions with different kinetic energy and progenitor mass. The models are compared with observation. We find the mass-energy scaling relation required to explain the observed mass-velocity correlation. We further demonstrate helium-rich and helium-deficient SNe follow the same mass-energy scaling relation.

母核质量与爆炸动能的关系是揭示剥离包层核坍缩超新星爆炸机制的关键。在这项工作中，我们提出了一种方法来推导出这种关系，使用星云光谱的SESNe，基于[O I]/[Ca II]，这措施的祖质量，和[O I]宽度，这措施的膨胀速度的喷出物之间的相关性。使用流体动力学模拟，我们触发不同的动能和祖质量的爆炸。模型与观测结果进行了比较。我们发现所需的质量-能量标度关系来解释所观察到的质量-速度相关性。我们进一步证明了富氦和缺氦SNe遵循相同的质能标度关系。

项目成果

Statistical Properties of the Nebular Spectra of 103 Stripped-envelope Core-collapse Supernovae

• DOI: 10.3847/1538-4357/ac4f60
• 发表时间: 2022-01
• 期刊: The Astrophysical Journal
• 作者: Qiliang 其亮 Fang 方;K. Maeda;H. Kuncarayakti;Masaomi Tanaka;K. Kawabata;T. Hattori;K. Aoki;T. Moriya;M. Yamanaka

Luminous Type II Short-Plateau Supernovae 2006Y, 2006ai, and 2016egz: A Transitional Class from Stripped Massive Red Supergiants

• DOI: 10.3847/1538-4357/abf6d6
• 发表时间: 2020-10
• 期刊: The Astrophysical Journal
• 作者: D. Hiramatsu;D. Howell;T. Moriya;Jared A. Goldberg;G. Hosseinzadeh;I. Arcavi;Joseph P. Anderson;C. Gutiérrez;J. Burke;C. McCully;S. Valenti;L. Galbany;Q. Fang;K. Maeda;G. Folatelli;E. Hsiao;N. Morrell;M. Phillips;M. Stritzinger;N. Suntzeff;M. Gromadzki;K. Maguire;T. Müller-Bravo;D. Young