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Life on Earth has made us familiar with three states of matter, viz; solid, liquid, and gaseous states. However, when a gas is heated to higher temperatures, it disintegrates into ions and electrons and the gas becomes fully or partially ionized forming a plasma state, which is the 'fourth state' of matter. The presence of massive charged dust particles in a plasma can drastically influence the dispersion and nonlinear properties of a wave. As a result, in recent years, there has been a rapidly growing interest in nonlinear phenomena (such as solitons) in dusty plasmas. A theoretical...

The evolution and energy production process of stars is dependent on their masses. Stars are observed to lose mass during their evolution along the Red Giant Branch (RGB). Therefore, by the time stars reach the Red Giant Clump (RGC), they are said to have undergone enormous mass loss. This may inturn affect the evolutionary path of these stars. Using the data from the Kepler open cluster, NGC 6819, the masses of stars along the RGB and RGC were obtained using the asteroseismic parameters (such as maximum pulsational frequency and large frequency separation). The age of the RGC stars was...