Oscillations In Galaxies

Details Oscillations In Galaxies Oscillations In Galaxies

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cemda..76...69n&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, v. 76, Issue 1, p. 69-77 (2000).

Astronomy and Astrophysics

Astronomy

1

Stellar Dynamics, Galaxies, Oscillations, Numerical Simulations

Scientific paper

Oscillations in galaxies have been investigated by numerical simulations. The various models used have density distributions corresponding to that of polytrope of index n in the range 0 ≤ n ≤ 4 and their evolution has been followed for more than 70 crossing times. The kinetic energy shows regular and smooth oscillations for models with n = 0, 1 and 2 whereas in other models it shows noisy oscillation. The oscillation in kinetic energy is observed to have a period of 3 crossing time irrespective of the density and size of the galaxy. The amplitude of oscillation is seen to decrease as the central density of the galaxy increases.

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