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Title:
Optical spectra of radio galaxies
Authors:
Grandi, S. A.; Osterbrock, D. E.
Affiliation:
AA(Lick Observatory, Santa Cruz, Calif.), AB(Lick Observatory, Santa Cruz, Calif.)
Publication:
Astrophysical Journal, Part 1, vol. 220, Mar. 15, 1978, p. 783-789. (ApJ Homepage)
Publication Date:
03/1978
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Emission Spectra, Galactic Structure, Line Spectra, Radio Galaxies, Spectrophotometry, Galactic Radiation, H Alpha Line, H Beta Line, Luminous Intensity, Seyfert Galaxies
DOI:
10.1086/155966
Bibliographic Code:
1978ApJ...220..783G

Abstract

Based on Lick image-tube-image-dissector scans of 35 radio galaxies known to have emission lines, a high degree of association is found between the spectroscopic classification 'broad-line' and the morphological classification 'N.' Relative line intensities are presented for nine broad-line radio galaxies (BLRG). These data, combined with previously published results, illustrate three spectroscopic differences between BLRG and Seyfert 1 galaxies: BLRG have much weaker Fe II emission, steeper H-alpha/H-beta ratios, and larger 5007-A forbidden O III/H-beta ratios than Seyfert 1 galaxies.

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