相对论辐射流体力学的色散关系

IF 1.8 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Lorenzo Gavassino
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引用次数: 0

摘要

我们计算了具有灰色吸收不透明的相对论“物质+辐射”流体中横波、热波和声波的线性色散关系。这是通过以“辐射应力-能”/“物质应力-能”的比例扰动求解辐射流体动力学来实现的。所得表达式\(\omega \, {=} \, \omega (k)\)准确地描述了任意\(k\, {\in }\, \mathbb{R}\)的水动力演化。动力学的一般特征(例如,协变稳定性、传播速度和不连续的阻尼)直接从这些色散关系的解析形式中得到。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dispersion relations of relativistic radiation hydrodynamics

We compute the linearised dispersion relations of shear waves, heat waves, and sound waves in relativistic “matter+radiation” fluids with grey absorption opacities. This is done by solving radiation hydrodynamics perturbatively in the ratio “radiation stress-energy”/“matter stress-energy”. The resulting expressions \(\omega \, {=} \, \omega (k)\) accurately describe the hydrodynamic evolution for any \(k\, {\in }\, \mathbb{R}\). General features of the dynamics (e.g., covariant stability, propagation speeds, and damping of discontinuities) are argued directly from the analytic form of these dispersion relations.

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来源期刊
Astrophysics and Space Science
Astrophysics and Space Science 地学天文-天文与天体物理
CiteScore
3.40
自引率
5.30%
发文量
106
审稿时长
2-4 weeks
期刊介绍: Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.
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