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Date and Time of the Query: 2019-05-19 T17:29:20 PDT
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For refcode 1988A&A...195...27F:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1988A&A...195...27F A model of spiral - galaxy evolution I. Galaxy morphology and star formation rate F. Ferrini and D. Galli Istituto di Astronomia, Universita di Pisa, P. Torricelli 2, I-56100 Pisa, Italy Received March 11, accepted September 8, 1987 Summary. 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 effects 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. Key words: stars: formation - galaxies: evolution
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