Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..345p&link_type=abstract
Astrophysical Journal, Part 1, vol. 243, Jan. 15, 1981, p. 345-368.
Astronomy and Astrophysics
Astronomy
86
Astronomical Spectroscopy, Infrared Astronomy, Optical Emission Spectroscopy, Quasars, Spectrophotometry, Balmer Series, Emission Spectra, H Lines, Lyman Alpha Radiation, Visual Photometry
Scientific paper
Combined optical-infrared spectrophotometry of the emission line spectra of 14 QSOs is presented. These observations allow determination of the L-alpha/Balmer ratios in high-redshift objects and the P-alpha/Balmer ratios in the low-redshift objects. An attempt is made to synthesize the 'intrinsic' hydrogen line spectrum of QSOs. The resulting spectrum is inconsistent with optically thin recombination models reddened by dust, but agrees qualitatively with recent optically thick calculations with Te equal to or greater than 15,000 K in the line emitting region, with perhaps a small amount of reddening /E(B-V) less than or equal to 0.2/. Much of the observed 'continuum' structure can be attributed to optically thin Balmer continuum emission from a region with Te less than or equal to 10,000 K plus blended optically thick Fe II transitions.
Pipher Judith L.
Puetter Richard C.
Smith Harding E.
Willner Steve P.
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