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| Sound velocity in dense stellar matter with strangeness and compact stars | |
Xia, Chengjun1; Zhu, Zhenyu2; Zhou, Xia3 ; Li, Ang2
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| 2021-05-01 | |
| Source Publication | CHINESE PHYSICS C
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| ISSN | 1674-1137 |
| Volume | 45Issue:5Pages:055104 |
| Contribution Rank | 3 |
| Abstract | The phase state of dense matter in the intermediate density range (similar to 1-10 times the nuclear saturation density) is both intriguing and unclear and can have important observable effects in the present gravitational wave era of neutron stars. As matter density increases in compact stars, the sound velocity is expected to approach the conformal limit (c(s)/c = 1/root 3) at high densities and should also fulfill the causality limit (c(s)/c < 1). However, its detailed behavior remains a prominent topic of debate. It was suggested that the sound velocity of dense matter could be an important indicator of a deconfinement phase transition, where a particular shape might be expected for its density dependence. In this work, we explore the general properties of the sound velocity and the adiabatic index of dense matter in hybrid stars as well as in neutron stars and quark stars. Various conditions are employed for the hadron-quark phase transition with varying interface tension. We find that the expected behavior of the sound velocity can also be achieved by the nonperturbative properties of the quark phase, in addition to a deconfinement phase transition. Moreover, it leads to a more compact star with a similar mass. We then propose a new class of quark star equation of states, which can be tested by future high-precision radius measurements of pulsar-like objects. |
| Keyword | quark matter hadron-quark phase transition neutron star |
| DOI | 10.1088/1674-1137/abea0d |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | EQUATION-OF-STATE ; QUARK MATTER ; PHASE-TRANSITION ; MAXIMUM MASS ; NUCLEAR-MATTER ; HYBRID STARS ; NEUTRON ; CONSTRAIN ; PARAMETERS ; LIGHT |
| Funding Project | National SKA Program of China[2020SKA0120300] ; National Natural Science Foundation of China[11873040] ; Youth Innovation Fund of Xiamen[3502Z20206061] ; Ningbo Natural Science Foundation[2019A610066] ; CAS Light of West China Program[2018-XBQNXZ-B-025] ; Tianshan Youth Program[2018Q039] |
| WOS Research Area | Physics |
| WOS Subject | Physics, Nuclear ; Physics, Particles & Fields |
| WOS ID | WOS:000646853000001 |
| Publisher | IOP PUBLISHING LTD |
| Funding Organization | National SKA Program of China ; National Natural Science Foundation of China ; Youth Innovation Fund of Xiamen ; Ningbo Natural Science Foundation ; CAS Light of West China Program ; Tianshan Youth Program |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4009 |
| Collection | 射电天文研究室_脉冲星研究团组 |
| Corresponding Author | Li, Ang |
| Affiliation | 1.Zhejiang Univ Ningbo, Inst Technol, Sch Informat Sci & Engn, Ningbo 315100, Peoples R China 2.Xiamen Univ, Dept Astron, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| Recommended Citation GB/T 7714 | Xia, Chengjun,Zhu, Zhenyu,Zhou, Xia,et al. Sound velocity in dense stellar matter with strangeness and compact stars[J]. CHINESE PHYSICS C,2021,45(5):055104. |
| APA | Xia, Chengjun,Zhu, Zhenyu,Zhou, Xia,&Li, Ang.(2021).Sound velocity in dense stellar matter with strangeness and compact stars.CHINESE PHYSICS C,45(5),055104. |
| MLA | Xia, Chengjun,et al."Sound velocity in dense stellar matter with strangeness and compact stars".CHINESE PHYSICS C 45.5(2021):055104. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Xia-2021-Sound veloc（1832KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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