Faint object spectrograph observations of the low-luminosity Seyfert galaxy NGC 1566

Details Faint object spectrograph observations of the low-luminosity Seyfert galaxy NGC 1566 Faint object spectrograph observations of the low-luminosity Seyfert galaxy NGC 1566

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377l..13k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 377, Aug. 10, 1991, p. L13-L16.

Astronomy and Astrophysics

Astrophysics

18

Active Galactic Nuclei, Faint Objects, Luminosity, Seyfert Galaxies, Spectrographs, Ultraviolet Spectra, Balmer Series, Emission Spectra, Line Shape, Line Spectra

Scientific paper

FOS observations of the Seyfert galaxy NGC 1566 show it to possess the broad lines characteristic of a typical Seyfert 1 galaxy, even in states of very low luminosity. The continuum, however, is steep with no suggestion of the ultraviolet excess seen in higher luminosity AGNs. The broad emission lines have symmetric profiles, but are redshifted by 200-1000 km/s relative to the systemic velocity. The broad-line ratios indicate a low ionization parameter, and the strength of lines such as Fe II, Mg II, and the Balmer continuum relative to the UV continuum supports models for X-ray heating of the broad-line cloud interiors.

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