Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19916003d&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #160.03; Bulletin of the American Astronomical Society, Vol. 34, p.570
Other
Scientific paper
There is a large amount of data present on spiral galaxies in the nearby Universe. Hα data from Kennicutt and collaborators provides information about recent star formation, while broad band optical colours contain the star formation histories of galaxies over their lifetimes. Radio emission at 1.4 GHz is also a tracer of star formation as the emission is believed to arise from supernova remnants. It is very likely that galaxies experience multiple episodes of star formation as they evolve. In order to understand the nearby galaxies, we model their star formation history as periodic bursts with varying burst shapes, and use the PEGASE galaxy evolution code (Fioc and Rocca-Volmerange 2000) to compute Hα fluxes and the optical colours. We will present some of the star formation histories that we use. We find that bursts which decay exponentially seem to fit the data better than other burst shapes that we explored. We also compare our models to the observed radio-to-optical luminosity function.
Bryant Johann
Cram Lawrence
D'Cruz N.
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