Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261l...1v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 1, p. L1-L4.
Astronomy and Astrophysics
Astronomy
4
Far Infrared Radiation, H Alpha Line, Infrared Sources (Astronomy), Starburst Galaxies, Astronomical Models, Infrared Astronomy Satellite, Interstellar Extinction, Luminosity, Star Formation
Scientific paper
Using IRAS IR data and H-alpha CCD data for a sample of 38 FIR selected starburst galaxies with FIR luminosities ranging from 109 to 5 x 10 exp 11 solar luminosities, we find that the FIR and H-alpha luminosities are correlated. The average value of log(L(FIR)/L exp 0(H-alpha)) equals 1.9 +/- 0.1. The H-alpha luminosities have been corrected for reddening using H-alpha/H-beta line ratios. The relation between the FIR and uncorrected H-alpha luminosities of optically selected normal galaxies and FIR selected starburst galaxies indicates that the dust absorption in H-alpha increases smoothly with increasing luminosities. Application of a simple starburst model to the L(FIR/L exp 0(H-alpha)) correlation indicates that in a starburst stars are formed up to masses of 60 solar masses. Star formation rates derived for these starburst galaxies range from 0.3 to 300 solar masses/yr. Estimates of the available gas masses indicate that these star formation rates can be sustained for at least 10 exp 8 yr.
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