Mass distribution of neutron stars in binary systems
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917529010569216 |
|---|---|
| author | Hu, Zhe Lv, GuoLiang Zhu, ChunHua Guo, Sufen Liu, Helei Li, Lin Li, Zhuowen Li, Zhenwei |
| author_facet | Hu, Zhe Lv, GuoLiang Zhu, ChunHua Guo, Sufen Liu, Helei Li, Lin Li, Zhuowen Li, Zhenwei |
| contents | It is known that the mass distribution of the known neutron stars (NSs) exhibits a bimodal pattern. The origin of this distribution remains a subject of debate. We constructed a super-Eddington accretion model for accreting neutron stars and investigated the mass growth and distribution of these stars using the population synthesis method. We find, in our model, the mass growth of NSs depends on the binary orbital period and the mass of the donor star. Our results can successfully account for the bimodal distribution of NS masses. The peak distribution of NS masses at around ~ 1.8 Msun primarily originates from NS binary systems where the donor star mass is less than ~ 1.6 Msun and the orbital period is shorter than 20 days; while, NS systems that may undergo common envelope evolution and these NSs can account for the mass peak at 1.4 Msun. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_24917 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Mass distribution of neutron stars in binary systems Hu, Zhe Lv, GuoLiang Zhu, ChunHua Guo, Sufen Liu, Helei Li, Lin Li, Zhuowen Li, Zhenwei Solar and Stellar Astrophysics High Energy Astrophysical Phenomena It is known that the mass distribution of the known neutron stars (NSs) exhibits a bimodal pattern. The origin of this distribution remains a subject of debate. We constructed a super-Eddington accretion model for accreting neutron stars and investigated the mass growth and distribution of these stars using the population synthesis method. We find, in our model, the mass growth of NSs depends on the binary orbital period and the mass of the donor star. Our results can successfully account for the bimodal distribution of NS masses. The peak distribution of NS masses at around ~ 1.8 Msun primarily originates from NS binary systems where the donor star mass is less than ~ 1.6 Msun and the orbital period is shorter than 20 days; while, NS systems that may undergo common envelope evolution and these NSs can account for the mass peak at 1.4 Msun. |
| title | Mass distribution of neutron stars in binary systems |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.24917 |