Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...195...27f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 27-37. Research supported by the Ministero della
Astronomy and Astrophysics
Astrophysics
38
Galactic Evolution, Hubble Diagram, Spiral Galaxies, Star Formation Rate, Stellar Evolution, H Alpha Line, Stellar Mass
Scientific paper
The suggestion by Sandage (1986) that the change of star formation rate (SFR) with time is a signature of each Hubble type, is discussed and verified on a large set of data. The nonlinear phase - coupling model by Shore et al. (1986) proposed for the evolution of galaxies with disk and halo components is here adopted to follow the star formation history in spiral galaxies. The effets of both stimulated and spontaneous star formation are included. A simple hypothesis on the connection between the spiral wave amplitude and the cloud phase is sufficient to generate a continuous series of star formation histories, which may correspond to the sequence of Hubble types.
Ferrini Federico
Galli Daniele
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