非均质 ISM 中的 MHD 透镜用于定性了解超新星残余的形态

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astrophysics and Space Science Pub Date : 2024-08-06 DOI:10.1007/s10509-024-04346-y

Yoshiaki Sofue

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引用次数: 0

摘要

为了定性地理解壳型超新星残骸（SNR）的复杂形态，研究了快速模式磁流体动力（MHD）波穿过不均匀ISM的膨胀壳的形态演变。阿尔弗韦恩速度高的星际云充当凹透镜，使 MHD 波发散，而阿尔弗韦恩速度慢的星际云则充当凸透镜，使波汇聚到焦点。通过将各种类型的云和不同阿弗文速度、大小或波长的波动结合在一起，MHD 波壳获得了各种形态结构，呈现出丝状、弧状、环状、洞状和焦弦状，模仿了古老和变形的 SNR。

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MHD lensing in inhomogeneous ISM for qualitative understanding of the morphology of supernova remnants

Morphological evolution of expanding shells of fast-mode magnetohydrodynamic (MHD) waves through an inhomogeneous ISM is investigated in order to qualitatively understand the complicated morphology of shell-type supernova remnants (SNR). Interstellar clouds with high Alfvén velocity act as concave lenses to diverge the MHD waves, while those with slow Alfvén velocity act as convex lenses to converge the waves to the focal points. By combination of various types of clouds and fluctuations with different Alfvén velocities, sizes, or wavelengths, the MHD-wave shells attain various morphological structures, exhibiting filaments, arcs, loops, holes, and focal strings, mimicking old and deformed SNRs.

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来源期刊

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.