Enhanced star formation - The importance of bars in spiral galaxies

Details Enhanced star formation - The importance of bars in spiral galaxies Enhanced star formation - The importance of bars in spiral galaxies

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221p..41h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, Aug. 1, 1986, p. 41P-45P.

Astronomy and Astrophysics

Astronomy

104

Barred Galaxies, Radiant Flux Density, Spaceborne Astronomy, Star Formation, Galactic Nuclei, Infrared Astronomy Satellite

Scientific paper

IRAS observational data for a sample of 186 SB, SAB, and SA galaxies are analyzed statistically, and the results are presented in histograms and diagrams and interpreted. The ratio of the flux in the 25-micron band to that in the 12-micron band (F25/F12) is plotted against F100/F25 for each class of galaxy, and more than one third of the SB and SAB galaxies are found to have excess 25-micron flux. The mean IR luminosities of the barred and nonbarred samples are estimated as (4.3 and 1.7) x 10 to the 10th solar luminosity, respectively, and the excess is attributed to star formation which is not active-nucleus-dominated and takes place in circumnucleus rings formed by material from bar-driven inflow near an inner resonance.

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