| Title: |
From Be X-Ray Binaries to Double Neutron Stars: Exploring the Spin and Orbital Evolution |
| Authors: |
Yungang Zhou, Dehua Wang, Chengmin Zhang |
| Source: |
Universe, Vol 11, Iss 2, p 51 (2025) |
| Publisher Information: |
MDPI AG, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Elementary particle physics |
| Subject Terms: |
pulsar, binary pulsar, Be X-ray binary, double neutron star, Elementary particle physics, QC793-793.5 |
| More Details: |
We explore the evolutionary link between Galactic Be X-ray binaries (BeXBs) and Galactic field double neutron stars (DNSs) based on the properties of the NS spin period—P and binary orbital period—Porb. First, both BeXB and DNS sources show positive correlation trends in P versus Porb relation (P−Porb diagram), which may relate to the influence of the accretion evolution. Secondly, the two types of sources exhibit similar bi-modal P/Porb distributions with the gaps of P∼40 s/Porb∼60 days for BeXBs and P∼50 ms/Porb∼1 day for DNSs, respectively. We propose a possibility that Galactic BeXBs may transfer the bi-modal P/Porb classifications to Galactic field DNSs during the evolution process. Furthermore, based on the bi-modal gaps, we infer the contraction factors of P (by ∼1800) and Porb (by ∼160) valuesin the evolution from Galactic BeXBs to Galactic field DNSs. We find that the scaled P or Porb values of Galactic BeXBs share the similar bi-modal distributions to that of Galactic field DNSs, and these results can offer a reference to trace the classification and evolution between the two types of sources. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2218-1997 |
| Relation: |
https://www.mdpi.com/2218-1997/11/2/51; https://doaj.org/toc/2218-1997 |
| DOI: |
10.3390/universe11020051 |
| Access URL: |
https://doaj.org/article/b6885646bbc141da8204f2bbd6390896 |
| Accession Number: |
edsdoj.b6885646bbc141da8204f2bbd6390896 |
| Database: |
Directory of Open Access Journals |
