Projects
Masters Project : Accretion Flows Around Black Hole (2022)
Acharya Prafulla Chandra College, West Bengal State University
We have studied accretion flows and their behaviors around black holes considering three different geometrical accretion disk models. A detailed study was performed considering the adiabatic equation of state. The transonic properties of flows of constant height, conical cross-section, and vertical equilibrium showed that all of them are identical when the polytropic constants are changed accordingly for different modes. A one-to-one mapping can be possible for the three models when the energy expression is the same for a particular angular momentum and sonic point. The sonic point analysis of the models was performed to indicate the possible accretion solution.
Investigation of Deuterium to Hydrogen Ratio in the Universe
Under the supervision of Dr. Kinsuk Acharyya
In this report, we have studied the Deuterium-to-hydrogen ratio in different astrophysical objects. The variations of the ratio in the universe indicate the reactions occurring in the different parts of it and that is the reason for the enhancement or diminution of the gases. The formation of the gases and their environment is understood from different studies of the D/H ratio, Isotopic Fractionation of the molecules, rate coefficients, etc. The D/H ratio of the astrophysical objects should have decreased with time but in some parts of the universe, we see a great enhancement of the same. The enhancement is due to different aspects of Astrochemistry. The result will be helpful to many fields of research and will give a firm conclusion to this Deuterium to Hydrogen enrichment.
Dispersion Characteristics and Shock Fronts of EAW in Semi-Classical Plasma (2020)
Physic-Point Summer workshop 2020, Under the guidance of Dr. Swarniv Chandra,
In this paper we consider the propagation of electron acoustic solitary waves in semi classical plasma. Using quantum hydrodynamic model we obtain the dispersion relation and study the parametric variations of the dispersion curve. We consider the propagation of EAW in semi classical plasma consisting of two groups of electrons at different temperatures and stationary cold ions forming a uniform neutralizing background. We further study the solitary profiles and its evolution by using the Korteweg-de Vries Burger equation. We extended our work to the study of Rogue waves. The results provide with interesting findings that has laboratory and astrophysical importance.
