Quarter-turn spirals just beyond the principal arms of galaxies

Details Quarter-turn spirals just beyond the principal arms of galaxies Quarter-turn spirals just beyond the principal arms of galaxies

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.331..394p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 331, Issue 2, pp. 394-398.

Astronomy and Astrophysics

Astronomy

5

Galaxies: Spiral, Galaxies: Structure

Scientific paper

Observations in the optical show that grand design spirals consist of a set of principal arms and characteristic near-circular extensions that can be described as quarter-turn spirals. Arguments are presented in favour of the idea that the latter set of spirals is merely caused by the response of the material of the disc to the gravitational potential of the main spiral arms.

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