An Appraisal of Spatio—Temporal Occurrence of Fluvial Hazard: Case Study of Flood in the Districts of Jalpaiguri and Alipurduar (West Bengal, India)

Abstract

In this article, we demonstrated a stellar model for compact star in presence of strange matter embedded in D ≥ 4 dimensional space-time defind by Finch-Skea metric. To study the relevant physical properties of the interior matter, we consider the equation of state (hencef orth EOS) as proposed in MIT bag model given by p = 1 3 (ρ − 4B), where B is termed as bag constant. The Mass-Radius relationships in four and higher dimensions are determined using the range of values of surface density through the relation ρs = 4B for which bulk strange matter may be a viable issue for compact objects. Here we choose the range of B such that stable strange matter may exist at zero external pressure relative to neutron. We note that a maximum value of the stellar radius is exist when B is fixed at a given allowed value for which metric functions considered here to be real. This is the maximum allowed radius (bmax) in this model which depends on surface density of a strange star. In four dimensions the compactness of a star is found to be greater than 0.33. In case of higher dimensions (D > 4), we observed different values of compactness. Causality conditions are satisfied interior to the star upto maximum allowed radius (bmax) for which metric function is real. The validity of energy conditions, surface red-shift and other parameters of the stellar configuration are studied and found new results. Stability of the system is also studied.