The structure of the broad-line region in NGC 4151

Details The structure of the broad-line region in NGC 4151 The structure of the broad-line region in NGC 4151

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pazh...11...83s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 11, Feb. 1985, p. 83-88) Soviet Astronomy Letters (ISSN 0360-0327), vol. 11, Jan.-Feb.

Astronomy and Astrophysics

Astronomy

3

Emission Spectra, H Alpha Line, Molecular Clouds, Seyfert Galaxies, Balmer Series, Galactic Nuclei, Quasars

Scientific paper

When applied to the nuclear region in the Seyfert galaxy NGC 4151 where the broad emission lines are formed, the model of a homogeneous distribution of emission-line clouds around the ionizing-continuum source predicts a time delay in the peak of flares in the H-alpha line, but not in the higher-order Balmer lines, relative to the maximum continuum flux, in good accord with the observations. If a cloud-free zone does surround the central source, it can occupy only a small fraction of the volume of the whole broad-line region.

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