Spectrophotometry of Paschen and Balmer lines in PKS 0312-77 and 3C 109

Details Spectrophotometry of Paschen and Balmer lines in PKS 0312-77 and 3C 109 Spectrophotometry of Paschen and Balmer lines in PKS 0312-77 and 3C 109

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100l...4k&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 2, July 1981, p. L4-L6. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

5

Astronomical Photometry, Balmer Series, Galaxies, Paschen Series, Quasars, Spectrophotometry, Emission Spectra, H Lines, Infrared Photometry, Infrared Radiation, K Lines, Radio Galaxies

Scientific paper

J, H, K photometry and narrow band infrared photometry of P-alpha in the K (2.2 micron) band are performed for the QSO PKS 0312-77 and for the N galaxy 3C 109, together with IDA spectrophotometry in the optical region. The P-alpha/H-beat ratios for both objects are determined. The infrared continuum of the QSO proves to be variable from a comparison with measurements of this source a year ago. The relatively high values of the P-alpha/H-beta ratios found here indicate that in active nuclei the ratios may deviate more strongly from the classical recombination prediction than might be inferred from previously obtained data.

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