Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83..566m&link_type=abstract
Astronomical Journal, vol. 83, June 1978, p. 566-573. Research supported by the National Research Council of Canada.
Astronomy and Astrophysics
Astronomy
28
Galactic Radiation, High Frequencies, Radio Astronomy, Seyfert Galaxies, Interstellar Magnetic Fields, Luminous Intensity, Magnetic Flux, Tables (Data)
Scientific paper
Observations have been made of 42 galaxies (40 Seyferts, one BL Lac-type galaxy, and one emission-line galaxy) at wavelengths of 2.8 and 1.3 cm. Twenty were detected at one or both frequencies, and spectra are presented for 14 of these using the present and previously published data. Seven, and possibly nine, have power-law spectra. The remaining spectra are more complex. Four galaxies show variability at one of the frequencies. Two of them, Mrk 348 and Mrk 231 vary on a time scale of a few days at a wavelength of 1.30 cm. The radio luminosities, calculated for 18 galaxies, cover a range extending from the normal spirals at the low end to the quasars at the high end. The Seyferts with radio luminosities greater than 10 to the 42nd power ergs/s are predominantly Class 1, whereas those with values less than 10 to the 42nd power ergs/s belong to both Class 1 and Class 2.
Gregory Philip C.
McCutcheon William H.
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