On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters
The detection of gravitational wave events has stimulated theoretical modeling of the formation and evolution of double compact objects (DCOs). However, even for the most studied isolated binary evolution channel, there exist large uncertainties in the input parameters and treatments of the binary e...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad2357 |
| _version_ | 1797289368047583232 |
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| author | Zhu-Ling Deng Xiang-Dong Li Yong Shao Kun Xu |
| author_facet | Zhu-Ling Deng Xiang-Dong Li Yong Shao Kun Xu |
| author_sort | Zhu-Ling Deng |
| collection | DOAJ |
| description | The detection of gravitational wave events has stimulated theoretical modeling of the formation and evolution of double compact objects (DCOs). However, even for the most studied isolated binary evolution channel, there exist large uncertainties in the input parameters and treatments of the binary evolution process. So far, double neutron stars (DNSs) are the only DCOs for which direct observations are available through traditional electromagnetic astronomy. In this work, we adopt a population synthesis method to investigate the formation and evolution of Galactic DNSs. We construct 324 models for the formation of Galactic DNSs, taking into account various possible combinations of critical input parameters and processes such as mass transfer efficiency, supernova type, common envelope efficiency, neutron star kick velocity, and pulsar selection effect. We employ Bayesian analysis to evaluate the adopted models by comparing with observations. We also compare the expected DNS merger rate in the galaxy with that inferred from the known Galactic population of pulsar-neutron star systems. Based on these analyses we derive the favorable range of the aforementioned key parameters. |
| first_indexed | 2024-03-07T19:02:58Z |
| format | Article |
| id | doaj.art-01e291d5bde54eb9a7d06f9038d9d8d7 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-07T19:02:58Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-01e291d5bde54eb9a7d06f9038d9d8d72024-03-01T10:27:49ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0196328010.3847/1538-4357/ad2357On the Formation of Double Neutron Stars in the Milky Way: Influence of Key ParametersZhu-Ling Deng0https://orcid.org/0000-0002-1398-2694Xiang-Dong Li1https://orcid.org/0000-0002-0584-8145Yong Shao2https://orcid.org/0000-0002-1250-8413Kun Xu3https://orcid.org/0000-0002-9739-8929School of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of China ; lixd@nju.edu.cn; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) , Ministry of Education, Nanjing 210023, People's Republic of ChinaSchool of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of China ; lixd@nju.edu.cn; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) , Ministry of Education, Nanjing 210023, People's Republic of ChinaSchool of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of China ; lixd@nju.edu.cn; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) , Ministry of Education, Nanjing 210023, People's Republic of ChinaSchool of Sciences, Qingdao University of Technology , Qingdao 266525, People's Republic of ChinaThe detection of gravitational wave events has stimulated theoretical modeling of the formation and evolution of double compact objects (DCOs). However, even for the most studied isolated binary evolution channel, there exist large uncertainties in the input parameters and treatments of the binary evolution process. So far, double neutron stars (DNSs) are the only DCOs for which direct observations are available through traditional electromagnetic astronomy. In this work, we adopt a population synthesis method to investigate the formation and evolution of Galactic DNSs. We construct 324 models for the formation of Galactic DNSs, taking into account various possible combinations of critical input parameters and processes such as mass transfer efficiency, supernova type, common envelope efficiency, neutron star kick velocity, and pulsar selection effect. We employ Bayesian analysis to evaluate the adopted models by comparing with observations. We also compare the expected DNS merger rate in the galaxy with that inferred from the known Galactic population of pulsar-neutron star systems. Based on these analyses we derive the favorable range of the aforementioned key parameters.https://doi.org/10.3847/1538-4357/ad2357Binary starsPulsarsStellar evolutionNeutron stars |
| spellingShingle | Zhu-Ling Deng Xiang-Dong Li Yong Shao Kun Xu On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters The Astrophysical Journal Binary stars Pulsars Stellar evolution Neutron stars |
| title | On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters |
| title_full | On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters |
| title_fullStr | On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters |
| title_full_unstemmed | On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters |
| title_short | On the Formation of Double Neutron Stars in the Milky Way: Influence of Key Parameters |
| title_sort | on the formation of double neutron stars in the milky way influence of key parameters |
| topic | Binary stars Pulsars Stellar evolution Neutron stars |
| url | https://doi.org/10.3847/1538-4357/ad2357 |
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