The goal of this thesis is to understand the black hole accretion process, out ows and jets, and predict its observational properties. In the study of accretion disc, the highly non-linear process involves a transport ...

Magnetic Cataclysmic Variables (MCVs) are binaries in which a primary magnetized white dwarf (WD) accretes material from Roche lobe-filling red dwarf companion. Two major classes of magnetic CVs are Polars and Intermediate ...

Blazars, comprising BL Lacertae objects (BL Lacs; featureless optical spectra) and flat-spectrum radio quasars (FSRQs; strong broad emission lines in optical spectra), are the active galactic nuclei (AGNs) with strong ...

Supernovae (SNe) are the giant stellar explosions that brie y outshines the whole galaxy and enhances chemical enrichment. The thesis highlights a group of SNe with diminishing Hydrogen envelope. This mostly comprises ...

Supernovae are the cosmic fireworks that mark the death of stars, wherein heavy elements are forged and dispersed, leading to the galactic enrichment of the Universe. In core-collapse supernovae, the collapse of the inert ...