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Effect of dark matter halo on global spiral modes in a collisionless galactic disc
Soumavo Ghosh, Tarun Deep Saini, Chanda J. Jog
Low surface brightness (LSB) galaxies are dominated by dark matter halo from the innermost radii; hence they are ideal candidates to investigate the influence of dark matter on dif…
Modal analysis of gravitational instabilities in nearly Keplerian, counter-rotating collisionless discs
Mamta Gulati, Tarun Deep Saini
We present a modal analysis of instabilities of counter-rotating, self-gravitating collisionless stellar discs, using the recently introduced modified WKB formulation of spiral den…
A modified WKB formulation for linear eigenmodes of a collisionless self-gravitating disc in the epicyclic approximation
Mamta Gulati, Tarun Deep Saini
The short--wave asymptotics (WKB) of spiral density waves in self-gravitating stellar discs is well suited for the study of the dynamics of tightly--wound wavepackets. But the text…
Decoding X-ray observations from centres of galaxy clusters using MCMC
Kiran Lakhchaura, Tarun Deep Saini, Prateek Sharma
We correct for the use of electron densities instead of total gas density in the pressure fits which were used to derive the local free-fall times (t) in the original pa…