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On the Nature Of Propagating MHD Waves In The Solar Atmosphere
(2014-10-15)
One of the most persistent problem in solar physics is the identification of the mechanism that heats the solar corona and accelerates the fast solar wind. Magneto-hydrodynamic (MHD)waves play a crucial role in heating of ...
Observational Aspects Of Core Collapse Supernovae
(2013-10-17)
The discovery of several bright supernovae (SNe) in recent years has evoked a great deal of interest in these objects. The study of these objects are of importance not only as probes to the end stages of stellar evolution, ...
Origin Of The Extragalactic Gamma-Ray Background
(2013-10-01)
It is evident that the origin of EGRB is not well established. In this thesis I examine the unresolved discrete origin of EGRB. The contribution from normal galaxies, starburst galaxies and AGNs to the EGRB is examined. ...
Studies Of Diffuse Ultraviolet Radiation
(2013-10-07)
Ever since the first observations of diffuse ultraviolet radiation by Hayakawa et al. (1969) and Lillie & Witt (1976), there has been an effort to understand its distribution and its origin. Unfortunately, because of the ...
A Study of Slow Modes in Keplerian Discs
(2018-02-25)
A rich variety of discs are found orbiting massive bodies in the universe. These could be accretion discs composed of gas around stellar mass compact objects fueling micro-quasar activity; protoplanetary discs, mainly ...
Investigating Systematics In The Cosmological Data And Possible Departures From Cosmological Principle
(2013-06-11)
This thesis contributes to the field of dark energy and observational cosmology. We have investigated possible direction dependent systematic signal and non-Gaussian features in the supernovae (SNe) Type Ia data. To detect ...
Single Pulse Studies Of Wide Profile Drifting Pulsars - A Probe Of Pulsar Magnetospheres
(2011-02-07)
The detailed nature of radio emission processes of pulsars and the exact location and distribution of the pulse emitting regions are still shrouded with mystery. Pulsars with drifting subpulses are considered as an important ...
Chemical Composition Of Selected Metal Poor Stars
(2011-08-04)
Orbital Evolution And Super-Orbital Flux Variations In X-ray Binary Pulsars
(2010-08-23)
X-ray binaries are binary stellar systems containing a compact object and a normal companion star which are gravitationally bound and rotate about a common center of mass. The compact object accretes matter from the companion ...