Chaotic Propellers of Barred Galaxies and Central Explosions
Debasish Mondal

TL;DR
This thesis investigates how central instabilities in disc galaxies, influenced by feedback, magnetic fields, and dark matter halos, can lead to star formation, bar formation, and spiral arm structures through chaotic dynamics.
Contribution
It introduces a novel analysis of bar-driven chaotic motion and its role in forming spiral arms and rings, considering different dark matter halo profiles.
Findings
Strong magnetic fields favor star cluster formation.
Bar-driven chaotic motion can produce spiral arms or rings.
Oblate dark haloes support cohesive galaxy evolution models.
Abstract
The central theme of this thesis work is to explore the possibilities of spiral arm formations from instabilities formed inside the central region of disc galaxies. These instabilities originate from the central baryonic feedback and have many prospects regarding the evolution of disc galaxies. They can trigger the gravitational collapse inside the dense molecular clouds that lead to the formation of stars under suitable astrophysical circumstances. In the present work, the role of parameters like the molecular cloud's magnetic field, rotation, etc., has been investigated behind this explosion-triggered star formation process with the help of Jeans instability analysis. From this study, our essential observation is that the formation of star clusters is favoured by a strong magnetic field (G), and the effect is enhanced at a more considerable distance from the centre.…
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Taxonomy
TopicsEarthquake Detection and Analysis · Astro and Planetary Science · Gamma-ray bursts and supernovae
