Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..868k&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, July-Aug. 1988, p. 868-876. In Russian.
Astronomy and Astrophysics
Astronomy
2
Elliptical Orbits, Galactic Structure, Natural Satellites, Orbital Mechanics, Spiral Galaxies, Galactic Mass, Rotating Fluids
Scientific paper
A large-scale wave pattern excited by a satellite moving in elliptic orbit in the plane of the galactic disk is studied numerically. It is shown that the satellite orbiting in the direction of disk rotation is an effective generator of a large-scale pattern. For slightly elongated orbits (e = 0.5), the wave pattern has two asymmetric trailing arms with one arm continuing as a bridge to the satellite. For the more elongated periodic orbits, the spiral structure may be divided into two regions. In the central regions of the disk with rotation close to the solid body, an open leading two-armed spiral structure arises. Outside this region, the spiral winding reverses to a trailing spiral pattern. The density amplitude of the central spiral branch is about 30 percent for a satellite/parent galaxy mass ratio of 3 percent.
Korchagin Vladimir I.
Langueva E. A.
Prokhovnik N. A.
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