Orbital motion of a massive object in a dense stellar system

Details Orbital motion of a massive object in a dense stellar system Orbital motion of a massive object in a dense stellar system

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..111t&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 1, pp. 111-117.

Physics

21

Black Hole Physics, Gravitation, Methods: Numerical, Celestial Mechanics, Stellar Dynamics, Stars: Kinematics

Scientific paper

In this paper we show the positional oscillation of a massive object in a dense stellar system by numerical N-body simulations. We found that the central massive object, which at first is placed at rest at the centre of the surrounding spherical stellar system, promptly departs from the centre and rotates in accordance with the rotation of the stellar system, if the stellar system has an appreciable rotation. This oscillatory motion continues for a long time because of the absence of dynamical friction. Such a long-lasting oscillation may explain the asymmetric structure observed in the centres of M31 and NGC 4486B, may cause the secular flow of gaseous elements distributed in the central regions of galaxies on to the massive object, and may ignite activity in the centres of galaxies.

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