205 citations · 1.4k across the 63 of their papers we have counts for
7 papers · 1 filter
Low frequency m=1 normal mode oscillations of a self-gravitating disc
Kanak Saha
A continuous system such as a galactic disc is shown to be well approximated by an N-ring differentially rotating self-gravitating system. Lowest order (m=1) non-axisymmetric featu…
The thickness of HI in galactic discs under MOND: theory and application to the Galaxy
F. J. Sanchez-Salcedo, K. Saha, C. A. Narayan
The outskirts of galaxies are a very good laboratory for testing the nature of the gravitational field at low accelerations. By assuming that the neutral hydrogen gas is in hydrost…
Global lopsided instability in a purely stellar galactic disc
K. Saha, F. Combes, C. Jog
It is shown that pure exponential discs in spiral galaxies are capable of supporting slowly varying discrete global lopsided modes, which can explain the observed features of lopsi…
Asymmetric warps in disk galaxies: dependence on dark matter halo
K. Saha, C. J. Jog
Recent observations have shown that most of the warps in the disk galaxies are asymmetric. However there exists no generic mechanism to generate these asymmetries in warps. We have…
Self-consistent response of a galactic disc to vertical perturbations
Kanak Saha, Chanda J. Jog
We study the self-consistent, linear response of a galactic disc to vertical perturbations as induced say by a tidal interaction. We calculate the self-gravitational potential corr…
On the generation of asymmetric warps in disk galaxies
Kanak Saha, Chanda J. Jog
The warps in many spiral galaxies are now known to asymmetric. Recent sensitive observations have revealed that asymmetry of warps may be the norm rather than exception. However th…