NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-20 T02:45:24 PDT
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For refcode 1989A&A...223...42B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1989A&A...223...42B Star formation rate and gas surface density in late-type galaxies V. Buat, J. M. Deharveng, and J. Donas Laboratoire d'Astronomie Spatiale, CNRS, Les Trois Lucs, F-13012 Marseille, France Received January 23, accepted March 22, 1989 Summary. The ultraviolet emission at 2000 A of 28 late-type galaxies is used as a tracer of their recent star formation and compared to their atomic and molecular hydrogen content. A correction for dust extinction, based on the total gas content, has been performed. The average star formation rate per unit area shows a very good correlation with the average total gas surface density. A power-law relation with an exponent between 1 and 1.6 is derived between these quantities. Much weaker correlations are found between the average star formation rate per unit area and each gas phase alone, especially the molecular phase. It is concluded that the star formation activity of these late-type galaxies depends on their total gas content and not on a single, atomic or molecular, gas phase. Key words: galaxies stellar content of - UV radiation - stars: formation of
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