Centimetre wavelengths radio studies of clumpy irregular galaxies

Details Centimetre wavelengths radio studies of clumpy irregular galaxies Centimetre wavelengths radio studies of clumpy irregular galaxies

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..188h&link_type=abstract

Astronomy and Astrophysics, vol. 105, no. 1, Jan. 1982, p. 188-191. Research supported by the Deutsche Forschungsgemeinschaft a

Astronomy and Astrophysics

Astrophysics

22

Astronomical Spectroscopy, Centimeter Waves, Emission Spectra, Galactic Structure, Radio Galaxies, Nonthermal Radiation, Radiant Flux Density, Radio Spectra, Radio Telescopes, Stellar Evolution, Thermal Emission

Scientific paper

High-frequency observations are made of six clumpy irregular galaxies, and four or possibly five of them are detected. The radio spectra are steep, suggesting that nonthermal emission dominates at high radio frequencies. This is true in spite of the known presence of hyperactive HII complexes in these objects. It is noted that the result is similar to that obtained in a recent study of a sample of nearby spirals indicating that thermal activity must be accompanied by nonthermal events. From the nonthermal radio spectra, it is concluded that a high rate of star formation must be accompanied by an equally active phase of supernovae.

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