Near-simultaneous optical and infrared spectrophotometry of active galaxies

Details Near-simultaneous optical and infrared spectrophotometry of active galaxies Near-simultaneous optical and infrared spectrophotometry of active galaxies

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.241..167y&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 241, Nov. 1, 1989, p. 167-194.

Astronomy and Astrophysics

Astronomy

3

Active Galaxies, Infrared Photometry, Infrared Spectroscopy, Quasars, Interstellar Extinction, Line Spectra, Photoionization, Recombination Reactions, Visible Spectrum

Scientific paper

Optical and infrared spectrophotometry for a sample of eight optically bright quasars, and the broad-line radio galaxy (BLRG) 3C 120 are presented. The optical and infrared spectrophotometry is separated by only five weeks, thus making it possible to minimize uncertainties due to variations in the objects. Comparison of observed Pa-alpha/H-alpha and H-alpha/H-beta ratios with a large number of current photoionization models showed that none of these models are able to reproduce observed values of Pa-alpha/H-alpha in any of the active galaxies except the quasars 3C 273 and 0736+017.

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