Influence of Entropy on Composition and Structure of Massive Protoneutron Stars

	Influence of Entropy on Composition and Structure of Massive Protoneutron Stars
	Hong, Bin; Jia, Huan-Yu; Mu, Xue-Ling; Zhou, Xia
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2016-08-01
卷号	66 页码:224-230
关键词	massive protoneutron stars entropy PSR J1614-2230 PSR J0348+0432
ISSN号	0253-6102
英文摘要	Adjusting the suitable coupling constants in relativistic mean field (RMF) theory and focusing on thermal effect of an entropy per baryon (S) from 0 to 3, we investigate the composition and structure of massive protoneutron stars corresponding PSR J1614-2230 and PSR J0348+0432. It is found that massive protoneutron stars (PNSs) have more hyperons than cold neutron stars. The entropy per baryon will stiffen the equation of state, and the influence on the pressure is more obvious at low density than high density, while the influence on the energy density is more obvious at high density than low density. It is found that higher entropy will give higher maximum mass, higher central temperature and lower central density. The entropy per baryon changes from 0 to 3, the radius of a PNS corresponding PSR J0348+0432 will increase from 12.86 km to 19.31 km and PSR J1612-2230 will increase from 13.03 km to 19.93 km. The entropy per baryon will raise the central temperature of massive PNSs in higher entropy per baryon, but the central temperature of massive PNSs maybe keep unchanged in lower entropy per baryon. The entropy per baryon will increase the moment of inertia of a massive protoneutron star, while decrease gravitational redshift of a massive neutron star.
资助项目	National Natural Science Foundation of China[11175147]
WOS关键词	EQUATION-OF-STATE ; NEUTRON-STARS ; HYPERNUCLEI ; POTENTIALS ; HYPERONS ; PHYSICS ; LAMBDA
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000384295100012
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/43409]
专题	中国科学院近代物理研究所
通讯作者	Jia, Huan-Yu
作者单位	Southwest Jiaotong Univ, Inst Modern Phys, Chengdu 610031, Peoples R China
推荐引用方式 GB/T 7714	Hong, Bin,Jia, Huan-Yu,Mu, Xue-Ling,et al. Influence of Entropy on Composition and Structure of Massive Protoneutron Stars[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2016,66:224-230.
APA	Hong, Bin,Jia, Huan-Yu,Mu, Xue-Ling,&Zhou, Xia.(2016).Influence of Entropy on Composition and Structure of Massive Protoneutron Stars.COMMUNICATIONS IN THEORETICAL PHYSICS,66,224-230.
MLA	Hong, Bin,et al."Influence of Entropy on Composition and Structure of Massive Protoneutron Stars".COMMUNICATIONS IN THEORETICAL PHYSICS 66(2016):224-230.