Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..566a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 15, 1987, p. 566-573.
Astronomy and Astrophysics
Astronomy
64
Astronomical Spectroscopy, Galactic Structure, Infrared Spectra, Ring Galaxies, Star Formation, Star Formation Rate, Visible Spectrum, Infrared Astronomy Satellite, Spaceborne Astronomy, Starburst Galaxies, Stellar Luminosity
Scientific paper
IRAS and optical data for a sample of 26 ring galaxies are analyzed, and it is found that: (1) relatively high average values of far-infrared luminosity L(FIR), infrared to blue luminosity ratio L(FIR)/L(B), and color temperature compared to normal galaxies, implying a high recent star formation rate; (2) evidence that a large fraction of the young stars are located in the rings, indicating a very extended, coherent starburst; and (3) a possible trend of the dispersion of L(FIR) among rings as a function of ring diameter. Thus, within the uncertainties inherent in the study of this relatively small sample, it appears that ring galaxies represent a unique class of nonnuclear coherent starbursts.
Appleton Phil N.
Struck-Marcell Curtis
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