Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101.1207g&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 101, April 1991, p. 1207-1230.
Astronomy and Astrophysics
Astronomy
68
Astronomical Photometry, Galactic Clusters, H Alpha Line, Spiral Galaxies, Ubv Spectra, Color-Color Diagram, Far Infrared Radiation, Spectral Emission, Star Formation Rate
Scientific paper
UBV and H-alpha photometry is presented for 78 galaxies in the Coma and Hercules superclusters and in the Cancer cluster. Combined with the published data, these observations provide quantitative estimates of the star formation rates and stellar populations in a sample of galaxies representing a variety of spiral types and environments. No significant differences are found between the average color indices and FIR properties in the clusters and a reference sample of relatively isolated objects. The data confirm the strong correlation between the nonthermal radio continuum and thermal FIR fluxes, but the ratio of these two quantities is significantly larger in the clusters than in the reference sample.
Boselli Alessandro
Gavazzi Giuseppe
Kennicutt Robert
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