H I observations of active and interacting galaxies

Details H I observations of active and interacting galaxies H I observations of active and interacting galaxies

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..161b&link_type=abstract

Astronomical Journal, vol. 88, Feb. 1983, p. 161-170. Deutsche Forschungsgemeinschaft

Mathematics

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25

Astronomical Spectroscopy, Emission Spectra, Hydrogen Clouds, Interacting Galaxies, Radio Galaxies, Seyfert Galaxies, Active Galaxies, Astronomical Catalogs, Centimeter Waves, Galactic Structure, Neutral Gases, Red Shift, Spectral Resolution

Scientific paper

Results are presented of a survey undertaken to increase the number of active galaxies and interacting pairs with radio emission observed in the 21-cm H I line. Relatively high-shift objects, generally in the range 7000-15,000 km/s, were selected. Details of the source selection, observing technique, and results are presented, including H I data and spectra for all detected galaxies and spectra for selected nondetections. Nine of the 18 Seyfert galaxies were detected. Neutral hydrogen masses range from seven to thirty-four billion solar masses. Both M(H I) and M(H I)/L(B) are typical of values for normal late-type spirals, although some of the detected Seyferts have peculiar early morphological types. None of the 12 radio galaxies or nine interacting pairs with radio emissions was detected in H I. The upper limits are consistent with no significant excess of neutral hydrogen for the indicated morphological types. No evidence is found for a correlation between H I flux and near-IR nuclear flux density.

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