Bibcode
Beckman, J. E.; Cepa, J.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. 37-46.
Advertised on:
3
1990
Citations
26
Refereed citations
24
Description
A set of parameters to characterize azimuthal profiles of galaxies is
proposed and applied to the spiral structure of the galaxies NGC 1832
and NGC 7479 observed in the B and I passbands. Interpretations of the
observations in terms of the two most widely discussed theories of star
formation, the spiral density wave theory and that of self-stochastic
propagation of star formation, are considered. NGC 7479, with well
defined arms, seems to maintain a leading density wave; evidence is
presented for a phase separation in the B and I bands corresponding to
star formation stimulated by the passage of the wave. NGC 1832, with
more flocculent spiral arms, presents a more confused interpretational
pattern.