Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.170..209c&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Astronomy and Astrophysics
Astrophysics
3
Density Wave Model, H Alpha Line, H Ii Regions, Spiral Galaxies, Star Formation Rate, Statistical Analysis, Stellar Mass, Stochastic Processes
Scientific paper
The present study estimates the efficiency ratio for massive star formation between the arms and the interarm disks of three grand design spirals. The estimate is based on H-alpha mapping observations of the H II regions in the galaxies. It is found that this efficiency ratio is 10 or more in the zones between the Lindblad resonances and the radius which is inferred to be corotation, dropping to values close to unity at these three resonance radii. These results point to a dominant influence of resonance structure in stimulating star formation in grand design spirals.
Beckman John E.
Cepa J. P.
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