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Theses
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(ARIES, Nainital, 2024-05)Air pollution is a major environmental challenge, with a substantial release of pollutants into Earth's atmosphere due to rapid urban and industrial growth over recent decades. Non-Methane Hydrocarbons (NMHCs) stand out ...
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(ARIES, Nainital, 2023-12)The lower atmospheric processes impose a number of challenges, such as fundamental understanding of small-scale processes and extreme weather events in the area of atmospheric physics. Atmospheric turbulence is one of the ...
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(ARIES, Nainital, 2023-09)The sensitive ecosystem of the Himalayas, particularly the central Himalayan (CH) region, is experiencing enhanced stress from anthropogenic forcing that requires adequate atmospheric observations and an improved representation ...
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(ARIES, Nainital, 2023-09)Gamma-ray bursts (GRBs) are brief but exceptionally bright flashes of γ-rays. They emit as much energy in a few seconds as thousands of Suns will produce in its entire lifetime. Even though they were discovered more than ...
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(ARIES, Nainital, 2021-12)Open stars clusters are excellent laboratories to test stellar and dynamical evolution theories as they host coeval stars situated at the approximately same distance. The physical parameters like kinematic motions, age, ...
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(ARIES, Nainital, 2022-06)Supernovae (SNe) and Gamma-Ray Bursts (GRBs) are among the brightest and most energetic explosions in the Universe. There are numerous direct and indirect evidences of connections between these two di erent types of ...
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(ARIES, Nainital, 2021-04)Present thesis focuses on the optical photometric, astrometric and dynamical analysis of three southern namely NGC 6067, NGC 2506, IC 4651 and two northern namely King 12 and NGC 2355 galactic star clusters. These clusters ...
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(ARIES, Nainital, 2022)Gamma-ray Bursts (GRBs) are powerful astronomical transient events emitting enormous energy in -rays within a short period. They provide a unique laboratory for studying relativistic e ects such as beaming, jets, shocks ...
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(ARIES, Nainital, 2023-09)Eclipsing binary (EB) is a class of binary systems in which the total brightness of the system changes with time as seen by the observer due to speci c orbital geometry. On the basis of the Roche lobe geometry or ...
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(ARIES, Nainital, 2023-09)Active galactic nuclei (AGN) are the innermost regions of the active galaxies, which outshine their hosts. Since these objects are located at far distances, even with large telescope apertures and improvements in detector ...
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(ARIES, Nainital, 2023-09)This thesis presents the development of a new simulation code, accompanied by a relativistically correct equation of state (EoS), dedicated to correctly accounting for the thermodynamics of multispecies plasma composed ...
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Variabilities in Trace Gases and Meteorological Parameters over the Himalayan and Associated Regions (ARIES, Nainital, 2023-10)The impacts of escalating emissions of air pollutants are now one of South Asia's most pressing environmental concerns, particularly in Northern India. Additionally, the adjacent Himalayas lead to the confinement of these ...
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(ARIES, Nainital, 2023-09)The swath of the Himalayan ranges spans the vast diversity of climatic patterns varying from subtropical to boreal. This interaction between the tropical and extratropical weather systems combined with substantial modifications ...
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(ARIES, Nainital, 2023-09)A new facility, the 4m International Liquid Mirror Telescope (ILMT) is currently being commissioned at the Devasthal Observatory, Nainital. ILMT will perform a deep survey of all the celestial objects falling in its field ...
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(ARIES, Nainital, 2023-09)Magnetic Cataclysmic Variables (MCVs) are a unique category of semi-detached binary star systems consisting of a high magnetic field (B >1 MG) white dwarf (WD) and a companion star, usually a late-type main sequence star ...
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(ARIES, Nainital, 2023-03-25)The evolution of pre-main-sequence (PMS) stars involves a set of complex physical processes such as evolution of circumstellar disks, accretion processes, bipolar jets and outflows, evolution of angular momentum etc. Because ...
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(ARIES, Nainital, 2023-12)Core-collapse supernovae (CCSNe) are catastrophic astrophysical phenomena that occur during the last evolutionary stages of massive stars having initial masses ≳ 8 M⊙. These catastrophic events play a pivotal role in ...
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(ARIES, Nainital, 2023-02-25)We present the multi-wavelength study of the hot stellar population in Galactic Globular clusters (GGCs). The population of interest in GCs is Blue straggler stars (BSSs) and the extreme end of the hor izontal branch ...
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(ARIES, Nainital, 2023-06-11)The starlight passing through the interstellar medium becomes linearly polarized due to the differential extinction from the alignment of asymmetric dust grains in the medium. Both macroscopic and microscopic information ...
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(ARIES, Nainital, 2023-07-04)Episodic accretion in young stellar objects (YSOs) are sudden enhance ment of the accretion rate from the circumstellar disc onto the central pre main sequence (PMS) star. During such episodes of enhanced accretion, it has ...