{"title":"The effects of dark matter and hyperons on the macroscopic properties of neutron star","authors":"Xueling Mu, Bin Hong, Xia Zhou, Zhongwen Feng","doi":"10.1007/s10509-023-04224-z","DOIUrl":null,"url":null,"abstract":"<div><p>We investigate the impact of hyperon and dark matter on macroscopic properties of neutron stars, including mass, radius, gravitational redshift, and moment of inertia, within the framework of relativistic mean field theory. Our findings reveal that the absorbing of hyperon and dark matter components significantly softens the equation of state of neutron star. Dark matter Fermi momentum varies between 0 and 0.06 GeV, and all types of neutron stars yield to the current observational constraints with dark matter Fermi momentum being <span>\\(k_{f}^{DM}=0.03\\text{ GeV}\\)</span>. In addition, both hyperons and dark matter increase the gravitational redshift while decreasing the moment of inertia. Lastly, we present the linear relationships between mass, gravitational redshift and moment of inertia that can further assist in identifying neutron star types.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"368 8","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astrophysics and Space Science","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10509-023-04224-z","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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Abstract
We investigate the impact of hyperon and dark matter on macroscopic properties of neutron stars, including mass, radius, gravitational redshift, and moment of inertia, within the framework of relativistic mean field theory. Our findings reveal that the absorbing of hyperon and dark matter components significantly softens the equation of state of neutron star. Dark matter Fermi momentum varies between 0 and 0.06 GeV, and all types of neutron stars yield to the current observational constraints with dark matter Fermi momentum being \(k_{f}^{DM}=0.03\text{ GeV}\). In addition, both hyperons and dark matter increase the gravitational redshift while decreasing the moment of inertia. Lastly, we present the linear relationships between mass, gravitational redshift and moment of inertia that can further assist in identifying neutron star types.
期刊介绍：
Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered.
The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing.
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