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MOHAMMAD JAVAD KALAEE
Articles written in Journal of Astrophysics and Astronomy
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Volume 41 All articles Published: 20 February 2020 Article ID 0002
MHD shock waves and discontinuities are often observed in the solar wind. We studied a strong shock wave event on 7 June 2014, during a solar maximum. The properties of forward shock are investigated and all physical parameters of interplanetary shock are analyzed. The upstream parameters, such as Alfvenvelocity and sound speed are calculated, and the angle ($\theta$) between the upstream magnetic field direction and the shock normal is estimated. To determine the propagation speed of the shock, a full numerical solution ofshock adiabatic equation is carried out. The thermal pressure for electrons and ions are calculated and also the pressure ratio and the entropy change across the shock are estimated. The results show that the shock strengthis about 3.88 with $\theta \approx 72^{\circ}$ (a quasi-perpendicular case), and shock propagation velocity is about 678 km/s. The increase in the specific entropy is also evaluated.
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Journal of Astrophysics and Astronomy
Volume 41, 2020
All articles
Continuous Article Publishing mode
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Journal of Astrophysics and Astronomy | News
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Continuous Article Publication
Posted on January 27, 2016Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.
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Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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