Sound velocity in dense stellar matter with strangeness and compact stars

doi:10.1088/1674-1137/abea0d

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 脉冲星研究团组

	Sound velocity in dense stellar matter with strangeness and compact stars
	Xia, Chengjun 2; Zhu, Zhenyu 1; Zhou, Xia 3; Li, Ang 1
刊名	CHINESE PHYSICS C
	2021-05-01
卷号	45 期号:5 页码:10
关键词	quark matter hadron-quark phase transition neutron star
ISSN号	1674-1137
DOI	10.1088/1674-1137/abea0d
通讯作者	Li, Ang(liang@xmu.edu.cn)
英文摘要	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.
资助项目	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关键词	EQUATION-OF-STATE ; QUARK MATTER ; PHASE-TRANSITION ; MAXIMUM MASS ; NUCLEAR-MATTER ; HYBRID STARS ; NEUTRON ; CONSTRAIN ; PARAMETERS ; LIGHT
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000646853000001
资助机构	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
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4008]
专题	脉冲星研究团组
通讯作者	Li, Ang
作者单位	1.Xiamen Univ, Dept Astron, Xiamen 361005, Peoples R China 2.Zhejiang Univ Ningbo, Inst Technol, Sch Informat Sci & Engn, Ningbo 315100, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式 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):10.
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),10.
MLA	Xia, Chengjun,et al."Sound velocity in dense stellar matter with strangeness and compact stars".CHINESE PHYSICS C 45.5(2021):10.