Emission line velocity survey of spiral galaxies with bright nuclei

Details Emission line velocity survey of spiral galaxies with bright nuclei Emission line velocity survey of spiral galaxies with bright nuclei

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.119..173t&link_type=abstract

(IAU, Asian-Pacific Regional Meeting, 3rd, Kyoto, Japan, Sept. 30-Oct. 5, 1984) Astrophysics and Space Science (ISSN 0004-640X),

Astronomy and Astrophysics

Astrophysics

Astronomical Spectroscopy, Emission Spectra, Galactic Nuclei, Spiral Galaxies, H Beta Line, H Ii Regions

Scientific paper

The degree of activity in the nuclei of spiral galaxies is examined. Two hundred galaxies south of delta +30 deg, with velocities less than 5000 km/s and high nuclear brightness are studied. Spatial profiles for H-beta and 5007 A emissions and H II regions and nuclear spectra are analyzed. The data reveal that over 60 percent of the samples have emissions in at least one line; only H-beta emissions are detected in 16 percent of all galaxies and 5007 A emissions are observed in 7 percent of the galaxies. It is concluded that at least 30 percent of the bright spiral galaxies with bright nuclei exhibit strong or weak energetic nuclear activity.

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