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.

Ulrich M., H., Altamore, A., Boksemberg, A., Bromage G., E., Clavel, J., Elvius, A., et al. (1985). Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151. NATURE, 313, 747-751 [10.1038/313747a0].

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

ALTAMORE, Aldo;
1985-01-01

Abstract

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.
1985
Ulrich M., H., Altamore, A., Boksemberg, A., Bromage G., E., Clavel, J., Elvius, A., et al. (1985). Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151. NATURE, 313, 747-751 [10.1038/313747a0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/122443
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