Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...194...65b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 194, no. 1-2, April 1988, p. 65-76.
Astronomy and Astrophysics
Astrophysics
34
Active Galactic Nuclei, Interstellar Matter, Line Spectra, Photoionization, Ultraviolet Spectra, X Ray Spectra, Luminosity, Seyfert Galaxies
Scientific paper
The authors calculated photoionization models for a variety of different input ionizing continua and have compared the resulting emission line ratios both with those predicted by a "successful" model using a conventional power law continuum, that of Ferland and Osterbrock (1986), and also with mean observed emission line spectra in Seyfert 2 and Seyfert 1.5 galaxies. It is found that black body continua in the temperature range Tbb = 1.0 - 1.6×105K are capable of producing an equally acceptable "fit" to AGN emission line spectra. By analogy, this conclusion also applies to simple accretion disk continua of characteristic temperature <6.0×105K. Flat power law spectra truncated at energies <150 eV also predict similar emission line spectra.
Binette Luc
Courvoisier Thierry J. -L.
Robinson Alan
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