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Date and Time of the Query: 2019-04-19 T07:53:11 PDT
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For refcode 1994A&A...282...19X:
Retrieve 114 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1994A&A...282...19X Star-formation histories and the mass-normalized FIR/radio correlation in late-type galaxies C. Xu, U. Lisenfeld, H-J. Volk, and E. Wunderlich Max-Planck-Institut fur Kernphysik, Postfach 103980,10-69121 Heidelberg, Germany Received May 27, accepted July 26,1993 Abstract. We study the correlation between the mass-normalized FIR (40-120 microns) and radio continuum (at 1.49 GHz) luminosities for a sample of 114 normal nearby late-type galaxies. The correlation, which spans 2-3 orders of magnitude, is found to be quite strong with a correlation coefficient of 0.87, demonstrating that the well-known correlation between the FIR and radio emissions of galaxies is not merely a mass-scaling (`richness') effect. Adopting the hypothesis that the basic reason of the FIR/radio correlation is the star-formation activity which ubiquitously exists in late-type galaxies, the disturbance (i.e. the nonlinearity and the scatter) of the correlation due to variations of star-formation history is estimated using a simple theoretical model, which shows that the nonlinearity and a large part of the scatter of the correlation can be explained by this effect. Applying this model to the median values of the mass-normalized FIR luminosities, we suggest that galaxies of different morphological type have systematically different star-formation histories on time scales of 10^10^ years, consistent with previous optical studies. Key words: galaxies - radio continuum - far-infrared - star formation - stars: supernovae
Retrieve 114 NED objects in this reference.
Please click here for ADS abstract

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