Supernovae (SNe) are highly energetic explosions in the Universe. They
are the final remark on the end stage of stars. This thesis work aims
to analyze the properties of one subclass of SNe known as hydrogen
de cient ...
Late-type stars (F, G, K, M), also called cool stars show activity phenomenon that appear
analogous to features observed on the Sun. Activity and variability in these stars are often
explained in terms of processes ...
It is broadly accepted that the presence of a supermassive black hole (SMBH) at the center of
an active galaxy is not merely triggering the mass accretion onto it but may play a crucial role
in predicting the final ...
It is broadly accepted that the presence of a supermassive black hole (SMBH) at the center of
an active galaxy is not merely triggering the mass accretion onto it but may play a crucial role
in predicting the final ...
Soon after the discovery of the first quasars, a small decrement in the spectrum of a quasar shortward of its Lyα emission line was measured. Recognizing the decrement was due to the Lyα resonance absorption of radiation ...