Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.114..233e&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 114, no. 2, Sept. 1985, p. 233-248.
Astronomy and Astrophysics
Astrophysics
Accretion Disks, Galactic Evolution, Galactic Nuclei, Galactic Structure, Spiral Galaxies, Corotation, Disk Galaxies, Libration, Mass Distribution
Scientific paper
A new approach to the problem of the formation of galaxy spiral structures having a rotating bar-like nucleus is offered. The process of disk formation due to matter accretion onto the disk is considered in terms of the solution of the key problem on the motion of the matter element in the equatorial plane of the galaxy in the corotation resonance region. It is shown that in the vicinity of unstable libration points high-density regions are formed, which elongate with time following the separatrix shape and forming thereby spiral arms.
Eliseev Iu. N.
Stepanov K. N.
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