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Upper bound on the speed of sound in nuclear matter from transport
Physics Letters B ( IF 4.3 ) Pub Date : 2024-12-10 , DOI: 10.1016/j.physletb.2024.139184
Mauricio Hippert, Jorge Noronha, Paul Romatschke

We point out that there is an upper bound on the speed of sound squared given by cs20.781 valid for all known systems described by relativistic transient hydrodynamics where calculations of certain ratios of hydrodynamic transport coefficients can be performed from first principles. Assuming this bound is valid for ultradense matter implies that the maximum mass of isolated (non-rotating) neutron stars cannot be larger than 2.7 solar masses.

中文翻译:


核物质传输声速的上限



我们指出,由 cs2≤0.781 给出的声速平方有一个上限,适用于相对论瞬态流体动力学描述的所有已知系统,其中流体动力学传输系数的某些比率的计算可以根据第一性原理进行。假设这个界限对超致密物质有效,这意味着孤立(非旋转)中子星的最大质量不能大于 2.7 太阳质量。
更新日期:2024-12-10
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