Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...272...68w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 272, Sept. 1, 1983, p. 68-83. Research supported by the Cleveland Astronomi
Astronomy and Astrophysics
Astrophysics
91
Line Spectra, Optical Emission Spectroscopy, Red Shift, Seyfert Galaxies, Space Density, Spatial Distribution, Astronomical Catalogs, Astronomical Spectroscopy, Galactic Structure, Markarian Galaxies, Radial Velocity
Scientific paper
A moderate-dispersion objective prism survey for low-redshift emission-line galaxies has been carried out in an 825 sq. deg. region of sky. A 4° prism was used with the IIIa-J emulsion to show that a new sample of emission-line galaxies is available even in areas already well searched with the "excess UV-continuum" technique. Redshifts for two-thirds of the new emission-line galaxies have been obtained. About 10% - 15% of the sample are Seyfert galaxies. An additional 20% exhibit the characteristics of starburst galaxies. It is suggested that tidal interaction involving matter infall may play a significant role in the generation of an emission-line spectrum. The space density of the new galaxies has been investigated and found to be similar to the space density of the Markarian galaxies.
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