Measuring star formation rates in blue galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, H Alpha Line, Star Formation, Star Formation Rate, Stellar Luminosity, Stellar Mass, Emission Spectra, H Ii Regions, Infrared Astronomy Satellite, Line Spectra, Mathematical Models

Scientific paper

The problems associated with measurements of star formation rates in galaxies are briefly reviewed, and specific models are presented for determinations of current star formation rates from H alpha and Far Infrared (FIR) luminosities. The models are applied to a sample of optically blue irregular galaxies, and the results are discussed in terms of star forming histories. It appears likely that typical irregular galaxies are forming stars at nearly constant rates, although a few examples of systems with enhanced star forming activity are found among HII regions and luminous irregular galaxies.

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