International Astronomy and Astrophysics Research Journal <p style="text-align: justify;"><strong>International Astronomy and Astrophysics Research Journal</strong>&nbsp;aims to publish high-quality papers (<a href="">Click here for Types of paper</a>) in all areas of Astronomy and Astrophysics. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer-reviewed, open access INTERNATIONAL journal.</p> <p style="text-align: justify;">Every volume of this journal will consist of 4 issues. Every issue will consist of minimum 5 papers. Each issue will be running issue and all officially accepted manuscripts will be immediately published online. State-of-the-art running issue concept gives authors the benefit of 'Zero Waiting Time' for the officially accepted manuscripts to be published. This journal is an international journal and scope is not confined by the boundary of any country or region.</p> en-US (International Astronomy and Astrophysics Research Journal) (International Astronomy and Astrophysics Research Journal) Wed, 28 Aug 2019 13:21:52 +0000 OJS 60 An Overview of the Swell Dynamics and Their Implications over Africa: Significance to Climate Change and Forcing <p>There is a growing interest in climate dynamics as the quantity and quality of new observational and theoretical applications are increasing. The ideas involved in understanding large-scale atmosphere-land-ocean dynamics and their interactions continue to hold special fascination because of their central importance for both theoretical and practical applications. This paper presents a theoretical assessment of the African swell dynamics imploring atmospheric formulation. Africa exhibits substantial inter-annual and inter-decadal climatic variability due to cyclone activity, storm surges and sea waves. Most of these surges and corresponding swell trains form over the tropical environment as easterly waves propagate westward across the Indian Ocean primarily between 10° and 20° S, termed source region. Localized sea surface temperatures (SSTs) and ocean upwelling play a vital role to provide moist enthalpy to power the surges. Also, multi-decadal variations in major wave activity are associated with SST changes in the Atlantic because tropical North Atlantic correlates positively with major hurricane activity. A key remote factor is temperature variability in the central and eastern equatorial Pacific associated with El Niño Southern Oscillation. The continuous erosion, perennial ocean surges, coastal swells and associated flooding due to the wave energy and its pounding effect are of great concern. Just like in most parts of the world where development of these systems is critical, they need to be closely watched particularly over southern Africa.&nbsp;</p> Modise Wiston ##submission.copyrightStatement## Wed, 28 Aug 2019 00:00:00 +0000 Jeans Instability of Fine Dust Particle with Impact of Coriolis Force, Electrical Resistivity and Electron Plasma Frequency <p>The present paper deals with the theoretical investigation of the combined influence of Coriolis force, electrical resistivity, electron plasma frequency and fine dust particles on the linear Jeans instability of gaseous plasma by using the generalized magneto-hydrodynamic fluid model. The general dispersion relation is derived using normal mode analysis technique and reduced for both the longitudinal and transverse mode of propagation and further, it is discussed of the axis of rotation parallel and perpendicular to the magnetic field. We found that the stabilizing influence of Coriolis force and electron plasma frequency increases for a fine dust particle, but electrical resistivity has the destabilizing influence on them. The Jeans criterion of instability is modified by fine dust particle only transverse mode of propagation when rotation is perpendicular to the magnetic field. The Coriolis force and electron plasma frequency have stabilized the growth rate of the system but the electrical resistivity is destabilizing the system. These results are applicable to interstellar clouds and star formation region.</p> D. L. Sutar, S. Sharma, R. K. Pensia ##submission.copyrightStatement## Thu, 26 Sep 2019 00:00:00 +0000