Density Dependence of Proton Fraction in Neutron Stars

LI Wen-Fei<SUP1; 2< sup>; ZHANG Feng-Shou<SUP1; CHEN Lie-Wen<SUP1

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2001, Vol. 25> Issue(8) : 759-764

Density Dependence of Proton Fraction in Neutron Stars

LI Wen-Fei ,

CHEN Lie-Wen

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Within the framework of Skyrme-Hartree-Fock theory based on the extended Skyrme effective interaction, the proton fraction in β-stable neutron stars was investigated for the charge neutrality condition. The density dependence of symmetry energy strength coefficient was studied with different potential parameters, and the behavior of proton fraction in neutron stars at high density for these potential parameters was obtained. The calculated results show that the proton fraction disappears at high density for potential parameters SII, SIII and SKM, which implies that the pure neutron matter may exist in the interior of neutron stars. It is also found that adding muons in neutron stars will increase the proton fraction.

References

[1]

. Serot B D,Walecka J D.Adv.Nucl.Phys.,1986,16(1):1. 2. Friedman B,Pandharipande V R.Nucl.Phys.,1981,A361:502. 3. Wiringa R B,Fiks V,Fabrocini A.Phys.Rev.,1988,C38:1010. 4. Bombaci I,Lombardo U.Phys.Rev.,1991,C44(5):1892. 5. Baldo M,Bombaci I,Burgio G F.Astr.Astrophys.,1997,328:274. 6. Donati P.Phys.Rev.Lett.,1994,72(18):2835. 7. Dean D J.Phys.Lett.,1995,B356:429. 8. ZHANG F S,GE L X.Nuclear Multifragmentation,Beijing:Science Press,1998(in Chinese)(张丰收,葛凌霄.原子核多重碎裂,北京:科学出版社,1998)9. ZHANG F S,GE L X.High Energy Phys.and Nucl.Phys.,1992,16(7):666(in Chinese)(张丰收,葛凌霄.高能物理与核物理,1992,16(7):666)10. ZHANG F S.Z.Phys.,1996,A356:16311. Kutschera M,Wojcik W.Phys.Rev.,1993,C47(3):107712. Lattimer J M,Pethick C J,Prakash M et al.Phys.Rev.Lett.,1991,66:2701

[1]	ZHAO Xian-Feng , WANG Shun-Jin , ZHANG Hua , JIA Huan-Yu . Effect of σ*,φ Mesons on the Neutron Star Matter at Finite Temperature. Chinese Physics C, 2007, 31(6): 532-537.
[2]	ZHAO Xian-Feng , WANG Shun-Jin , ZHANG Hua , JIA Huan-Yu . Effect of f₀(975) and φ(1020) Mesons on Neutron Star Mater. Chinese Physics C, 2007, 31(4): 345-349.
[3]	ZUO Wei , LI Ang , LUO Pei-Yan , YONG Gao-Chan . Properties of Proto-Neutron Star and Effect of Three-Body Forces. Chinese Physics C, 2006, 30(10): 956-960.
[4]	Bao Tmurbagan , LIU Guang-Zhou , ZHU Ming-Feng . Mass-Density-Dependent Quark Model with Thermodynamic Self-consistency and Hybrid Stars. Chinese Physics C, 2006, 30(S2): 255-257.
[5]	DING Wen-Bo , LIU Guang-Zhou . Condensations of K^－ and K⁰ in Neutron Star Matter. Chinese Physics C, 2006, 30(S2): 249-251.
[6]	CHEN Wei . Thermal Property of Protoneutron Star Matter. Chinese Physics C, 2006, 30(2): 118-122.
[7]	ZUO Wei , LI Ang , CHEN Ji-Yan , LI Zeng-Hua . Kaon Condensation in Neutron Star Matter and Nuclear Three-Body Force Effect. Chinese Physics C, 2005, 29(7): 632-638.
[8]	CHEN Wei , LIU Liang-Gang . The Equation of State of Neutron Star Matter in Uniform Strong Magnetic Fields. Chinese Physics C, 2005, 29(2): 119-123.
[9]	WEN Hai-Bao . Equation of State and Proton Ratio on the Inner Shell Layer of Neutron Stars. Chinese Physics C, 2005, 29(7): 657-663.
[10]	ZHU Zhao-Huan , BAN Shu-Fang , LI Jun , MENG Jie . Pesponse of the Neutron Star Properties to the Equation of State at Low Density. Chinese Physics C, 2005, 29(6): 565-569.
[11]	SHEN Gang , MENG Jie , Hillhouse G . Direct URCA Process in Neutron Stars. Chinese Physics C, 2004, 28(S1): 99-101.
[12]	LI Jun , BAN Shu-Fang , JIA Huan-Yu , SANG Jian-Ping , MENG Jie . Description of the Nuclear Matter and Neutron Star in Relativistic Mean Field Theory with Density-Dependent Interactions. Chinese Physics C, 2004, 28(2): 140-147.
[13]	JIA Huan-Yu , MENG Jie , ZHAO En-Guang , LI Jun , SANG Jian-Ping . Effect of Temperature on Hyperon Neutron Star. Chinese Physics C, 2003, 27(3): 200-205.
[14]	LIU Bo , GUO Hua . In-Medium Effects on Neutron Stars. Chinese Physics C, 2003, 27(8): 683-687.
[15]	LI Zeng-Hua , LU Guang-Cheng , ZUO Wei . Properties of Isospin Asymmetric Nuclear Matter and Extended BHF Approach (Ⅶ) Proton and Neutron ¹S₀ Superfluidity in Neutron Star Matter. Chinese Physics C, 2003, 27(12): 1084-1088.
[16]	GUO Hua , LIU Bo , LI Xi-Guo , CHEN Yan-Jun . Kaon Condensation in Neutron Star Matter. Chinese Physics C, 2003, 27(2): 113-117.
[17]	JIA Huan-Yu , LV Hong-Feng , MENG Jie . Hyperon rms Radii of _Λ²⁰⁸Pb and Neutron Star Structure. Chinese Physics C, 2002, 26(10): 1050-1055.
[18]	LI Wen-Fei , ZHANG Feng-Shou , CHEN Lie-Wen . Study on Mass and Radius of Neutron Star Using Asymmetry Equation of State of Nuclear Matter. Chinese Physics C, 2001, 25(9): 877-883.
[19]	LI Wen-Fei , ZHANG Feng-Shou , CHEN Lie-Wen . On the Moment of Inertia and Surface Redshift of Neutron Star. Chinese Physics C, 2001, 25(10): 1006-1011.
[20]	SUN Bao-Xi , JIA Huan-Yu , MENG Jie , ZHAO En-Guang . Neutron Star in Relativistic Mean-field Approximation. Chinese Physics C, 2000, 24(S1): 69-72.

Access

Get Citation

LI Wen-Fei, ZHANG Feng-Shou LI Wen-Fei, ZHANG Feng-Shou shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2000-06-23
Revised: 1900-01-01

Article Metric

Article Views(3071)
PDF Downloads(621)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Density Dependence of Proton Fraction in Neutron Stars

LI Wen-Fei

CHEN Lie-Wen

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2000-06-23
Accepted Date: 1900-01-01
Available Online: 2001-08-05

Abstract: Within the framework of Skyrme-Hartree-Fock theory based on the extended Skyrme effective interaction, the proton fraction in β-stable neutron stars was investigated for the charge neutrality condition. The density dependence of symmetry energy strength coefficient was studied with different potential parameters, and the behavior of proton fraction in neutron stars at high density for these potential parameters was obtained. The calculated results show that the proton fraction disappears at high density for potential parameters SII, SIII and SKM, which implies that the pure neutron matter may exist in the interior of neutron stars. It is also found that adding muons in neutron stars will increase the proton fraction.