The diverse morphology of gravitational wave signals from merging neutron star–white dwarf binaries
文献类型：期刊论文
| 作者 | Yu, Shenghua7; Lu, Youjun4,6; Jeffery, C. Simon3; Han ZW(韩占文)5; Liu DD(刘栋栋)5; Yang, Jie2; Fan, Xilong1; Peng, Bo7; Li, Jianbin7 |
| 刊名 | Monthly Notices of the Royal Astronomical Society
 |
| 出版日期 | 2026 |
| 卷号 | 545期号:2 |
| 关键词 | gamma ray burst: general galaxies: high redshift gamma ray burst: individual: GRB250314A |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf2077 |
| 产权排序 | 第5完成单位 |
| 文献子类 | Journal article (JA) - |
| 英文摘要 | In sufficiently compact neutron star–white dwarf (NSWD) binary systems, orbital decay means the white dwarf eventually fills its shrinking Roche lobe, initiating a phase of mass transfer. The exchange of angular momentum – both internal and external – plays a critical role in determining the binary’s evolutionary outcome. For neutron stars with relatively low magnetic fields and spin frequencies, whether the orbital separation continues to shrink depends on the interplay between gravitational wave (GW) radiation and mass transfer dynamics. We compute the orbital evolution of NSWD binaries across a broad parameter space, incorporating four key variables. Our results reveal distinct boundaries in the NSWD mass–mass diagram: binaries with white dwarf masses above these thresholds undergo rapid orbital decay and direct coalescence. The dependence of these boundaries on system parameters indicates that Roche-lobe-filling NSWD binaries can follow multiple evolutionary pathways – a phenomenon we refer to as branched or polymorphic evolution. NSWD binary systems emit strong and diverse GW signals, many of which would be detectable by space-based GW observatories. The morphology of the evolving GW waveform provides a direct diagnostic for the NSWD binary configuration, including any contribution from an accretion disc. Our models can provide critical waveform templates for identifying merging binary signals in real-time GW data. © The Author(s) 2025. Published by Oxford University Press on behalf of Royal Astronomical Society. |
| 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 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28805]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.School of Physics and Technology, Wuhan University, Wuhan, 430072, China 2.School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China; 3.Armagh Observatory and Planetarium, College Hill, Armagh, BT61 9DG, United Kingdom; 4.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China; 5.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, China; 6.CAS Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing, 100101, China; 7.State Key Laboratory of Radio Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing, 100101, China; |
| 推荐引用方式 GB/T 7714 | Yu, Shenghua,Lu, Youjun,Jeffery, C. Simon,et al. The diverse morphology of gravitational wave signals from merging neutron star–white dwarf binaries[J]. Monthly Notices of the Royal Astronomical Society,2026,545(2). |
| APA | Yu, Shenghua.,Lu, Youjun.,Jeffery, C. Simon.,韩占文.,刘栋栋.,...&Li, Jianbin.(2026).The diverse morphology of gravitational wave signals from merging neutron star–white dwarf binaries.Monthly Notices of the Royal Astronomical Society,545(2). |
| MLA | Yu, Shenghua,et al."The diverse morphology of gravitational wave signals from merging neutron star–white dwarf binaries".Monthly Notices of the Royal Astronomical Society 545.2(2026). |
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来源：云南天文台
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