Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231..465p&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, March 15, 1988, p. 465-478.
Astronomy and Astrophysics
Astronomy
27
Astronomical Spectroscopy, Barred Galaxies, Radio Emission, Star Formation, Continuous Spectra, Data Sampling, Far Infrared Radiation, Infrared Astronomy Satellite, Morphology
Scientific paper
The radio properties of an IRAS-selected sample of nearby spiral galaxies have been investigated using new and published 20-cm continuum observations. Virtually all of the galaxies with steep 12 - 25 μm spectra are barred and possess a central radio source of linear extent less than 1 - 3 kpc. The authors argue that the activity in these systems is due to enhanced star formation rather than a compact nucleus. The central sources contribute, on average, 35 per cent to the total radio emission and their typical far-infrared luminosity is estimated to be a few ×109L_sun;. In contrast to the other IRAS wavebands, the 25 μm-radio correlation shows a marked dependence on the level of star-formation activity.
Hawarden Tim G.
Mountain Charles M.
Puxley Phil J.
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