Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151

Details Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151 Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..747u&link_type=abstract

Nature (ISSN 0028-0836), vol. 313, Feb. 28, 1985, p. 747-751.

Physics

59

Galactic Nuclei, Seyfert Galaxies, Spectral Line Width, Ultraviolet Spectra, Emission Spectra, Quasars, Radio Galaxies, Secular Variations

Scientific paper

The Seyfert galaxy NGC4151 observed when the nucleus is at a minimum has two emission lines of full width at half maximum less than 7 and 16 A, respectively, and varying in intensity by a factor of three in 10 days. These lines are too narrow to be emitted by the whole broad-line region and must arise instead from two localized regions which have a special excitation mechanism, possibly a two-sided jet.

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