| 核子“直接URCA”过程发生的条件和中子星的冷却机制 |
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| 引用本文： | 张君毅 裴寿镛. 核子“直接URCA”过程发生的条件和中子星的冷却机制[J]. 北京师范大学学报(自然科学版), 1997, 33(4): 492-497 |
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| 作者姓名： | 张君毅 裴寿镛 |
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| 作者单位： | 北京师范大学物理学系 |
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| 摘 要： | 讨论了核子的“直接ＵＲＣＡ”过程发生的条件，发现在ＵＶ１４＋ＵＶⅡ态式描述的中子星物质中，核子的“直接ＵＲＣＡ”过程发生的条件是质子数分数必须超过０．１４；强调在中子昨丙“标准冷却”机制和“非标准冷却”机械可能同时存在；对几个没质量中子星的冷却过程的计算结果表明，引力 质量小于约１．６Ｍ的中子星核内应发生“标准冷却”过程，而在引力质量大于约１．６Ｍ的中子星核内可能存在２种冷却机制。
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| 关 键 词： | 中子星 冷却机制 URCA 核子 热演化方程 |
THE CONDITION OF NUCLEON DIRECT URCA PROCESS TO TAKE PLACE AND THE COOLING MECHANISMS OF NEUTRON STARS |
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| Zhang Junyi, Pei Shouyong. THE CONDITION OF NUCLEON DIRECT URCA PROCESS TO TAKE PLACE AND THE COOLING MECHANISMS OF NEUTRON STARS[J]. Journal of Beijing Normal University(Natural Science), 1997, 33(4): 492-497 |
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| Authors: | Zhang Junyi Pei Shouyong |
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| Abstract: | The condition of direct URCA process of nucleons to take place is discussed.This condition is that the concentration of protons must exed a critical value of 0.14 in neutron star matter described by equations of state UV14+UVII. It is emphasised that standard cooling and nonstandard cooling in the core of neutron stars can be activated simultaneosly. The cooling processes of neutron stars with different masses are studied. The results indicats that the standard cooling takes place in the cons of neutron stars with less gravitational mass than 1.6M, but both standard cooling and nonstandard cooling can take place in the cons of neutron stars with more gravitational mass than 1.6M. |
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| Keywords: | neutron stars critical value of concentration of proton cooling mechanisms |
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