Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies

Details Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...282...19x&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 1, p. 19-33

Astronomy and Astrophysics

Astronomy

41

Astronomical Models, Galactic Evolution, Galactic Mass, Histories, Infrared Astronomy, Normalizing (Statistics), Radio Sources (Astronomy), Star Formation, Statistical Correlation, Supernovae, Far Infrared Radiation, Mathematical Models, Radio Astronomy, Stellar Luminosity

Scientific paper

We study the correlation between the mass-normalized far infrared (FIR) (40-120 microns) and radio continuum (at 1.49GHz) 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 1010 years, consistent with previous optical studies.

Affiliated with

Also associated with

No associations

Rating

Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Star-formation histories and the mass-normalized FIR/ratio correlation in late-type galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1012650