Evolution of weak discontinuity waves in non-ideal interstellar environments

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Journal of Astrophysics and Astronomy Pub Date : 2023-05-20 DOI:10.1007/s12036-023-09943-x
Shweta, Rahul Kumar Chaturvedi, Shobhit Kumar Srivastava, L. P. Singh
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Abstract

A systematic method is used to study the problem of propagation of planar, cylindrically symmetric and spherically symmetric shock waves of the one-dimensional motion of an inviscid, self-gravitating, non-ideal interstellar gas cloud. The analytic solution of the problem is resolved, which specifies non-linear behavior in the physical plane. The transport equation, which describes the evolution of weak discontinuity in non-ideal gas is derived. It is observed that the nature of the solution completely depends on the net volumetric cooling rate and self-gravitating parameter. It is observed that an increase in the value of self-gravitating parameter results in delay of process of shock formation and shock forms early when heating dominates cooling in the system. Also, expansive waves take less time to decay in planar geometry as compared to cylindrical and spherical geometries and compressive waves take more time to develop shocks for cylindrical and spherical geometries as compared to planar geometry.

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非理想星际环境中弱不连续波的演化
用系统的方法研究了非理想星际气体云一维运动中平面、圆柱对称和球对称激波的传播问题。求解了该问题的解析解,该解析解规定了该问题在物理平面上的非线性行为。导出了描述非理想气体中弱不连续演化的输运方程。观察到溶液的性质完全取决于净体积冷却速率和自重力参数。结果表明,当系统中加热主导冷却时,自重参数的增大会导致激波形成过程的延迟和激波形成的提前。此外,与圆柱和球面几何相比,膨胀波在平面几何中衰减所需的时间更短,而压缩波在圆柱和球面几何中产生冲击所需的时间更长。
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来源期刊
Journal of Astrophysics and Astronomy
Journal of Astrophysics and Astronomy 地学天文-天文与天体物理
CiteScore
1.80
自引率
9.10%
发文量
84
审稿时长
>12 weeks
期刊介绍: The journal publishes original research papers on all aspects of astrophysics and astronomy, including instrumentation, laboratory astrophysics, and cosmology. Critical reviews of topical fields are also published. Articles submitted as letters will be considered.
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