Electron-capture supernovae in NS + He star systems and the double neutron star systems

doi:10.1093/mnras/stae1112

	Electron-capture supernovae in NS + He star systems and the double neutron star systems
	Guo, Yun-Lang 4,5; Wang B(王博)2,3; Chen, Wen-Cong 1; Li, Xiang-Dong 4,5; Ge HW(葛宏伟)2,3; Jiang, Long 1; Han ZW(韩占文)2,3
刊名	Monthly Notices of the Royal Astronomical Society
	2024-06-01
卷号	530 期号:4 页码:4461-4473
关键词	binaries: close stars: evolution pulsars: general supernovae: general
ISSN号	0035-8711
DOI	10.1093/mnras/stae1112
产权排序	第3完成单位
文献子类	Journal article (JA)
英文摘要	Electron-capture-supernovae (EC-SNe) provide an alternative channel for producing neutron stars (NSs). They play an important role in the formation of double NS (DNS) systems and the chemical evolution of galaxies, and contribute to the NS mass distribution in observations. It is generally believed that EC-SNe originate from e-captures on 24Mg and 20Ne in the massive degenerate oxygen–neon (ONe) cores with masses close to the Chandrasekhar limit (MCh). However, the origin of EC-SNe is still uncertain. In this paper, we systematically studied the EC-SNe in NS + He star systems by considering the explosive oxygen burning that may occur in the near-MCh ONe core. We provided the initial parameter spaces for producing EC-SNe in the initial orbital period − initial He star mass (logPorbi − MHei ) diagram, and found that both MHei and minimum Porbi for EC-SNe increase with metallicity. Then, by considering NS kicks added to the newborn NS, we investigated the properties of the formed DNS systems after the He star companions collapse into NSs, such as the orbital periods, eccentricities, and spin periods of recycle pulsars (Pspin), etc. The results show that most of the observed DNS systems can be produced by NS kicks of 50 km s−1. In addition, we found that NSs could accrete more material if the residual H envelope on the He star companions is considered, which can form the mildly recycled pulsars (Pspin ∼ 20 ms) in DNS systems. © 2024 The Author(s).
学科主题	天文学 ; 恒星与银河系
URL标识	查看原文
资助项目	N/A
语种	英语
资助机构	N/A
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/27207]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.School of Science, Qingdao University of Technology, Qingdao, 266525, China 2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, 650216, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China; 4.Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing, 210023, China; 5.School of Astronomy and Space Science, Nanjing University, Nanjing, 210023, China;
推荐引用方式 GB/T 7714	Guo, Yun-Lang,Wang B,Chen, Wen-Cong,et al. Electron-capture supernovae in NS + He star systems and the double neutron star systems[J]. Monthly Notices of the Royal Astronomical Society,2024,530(4):4461-4473.
APA	Guo, Yun-Lang.,王博.,Chen, Wen-Cong.,Li, Xiang-Dong.,葛宏伟.,...&韩占文.(2024).Electron-capture supernovae in NS + He star systems and the double neutron star systems.Monthly Notices of the Royal Astronomical Society,530(4),4461-4473.
MLA	Guo, Yun-Lang,et al."Electron-capture supernovae in NS + He star systems and the double neutron star systems".Monthly Notices of the Royal Astronomical Society 530.4(2024):4461-4473.