Gravitationally induced spurs in spiral galaxies - an example in M31

Details Gravitationally induced spurs in spiral galaxies - an example in M31 Gravitationally induced spurs in spiral galaxies - an example in M31

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..464b&link_type=abstract

Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 464-469. NASA-supported research.

Mathematics

Logic

12

Andromeda Galaxy, Density Wave Model, Galactic Structure, Gravitational Effects, Hydrogen Clouds, Spiral Galaxies, Centimeter Waves, Galactic Radio Waves, Radial Velocity

Scientific paper

Radio and optical morphological data are consistent with a gravitational mechanism for the anomalous structure between the S4 and SS arms of M31, with the large complex of H I and H II in and around NGC 206 being implicated in the creation of the anomalous spur. Computer models of the gravitational effects of the spur show that its gravitational induction explains the observed velocity distortions. It is speculated that spurs in more distant galaxies, for which high resolution data as complete as that presented are not yet available, are also gravitational. This implicitly applies not only to spurs in galaxies with well defined spiral structure, but also for galaxies with more chaotic spiral arm patterns.

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