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Low Resolution Infrared Spectra of Quasars

Published online by Cambridge University Press:  14 August 2015

B. T. Soifer ,
G. Neugebauer ,
J. B. Oke  and
K. Matthews
B. T. Soifer
Affiliation:
Hale Observatories∗ and California Institute of Technology
G. Neugebauer
Affiliation:
Hale Observatories∗ and California Institute of Technology
J. B. Oke
Affiliation:
Hale Observatories∗ and California Institute of Technology
K. Matthews
Affiliation:
Hale Observatories∗ and California Institute of Technology

Abstract

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Low resolution spectra of a significant sample of quasars show that the Paschen α and Balmer line ratios do not agree with the radiative recombination case B result and vary widely within the quasars sampled. The range in Pα:Hβ ratios is a factor of ~ 6, while the range in Lyα:Hα ratios is a factor of ~ 5. For the Pα:Balmer series, the deviations from case B recombination are not consistent with reddening, but appear, within large dispersions, to be consistent with optical depth effects in the Balmer lines affecting the line ratios. The Lyα:Hα ratio is, however, correlated with the continuum spectral index, and can be explained as due to reddening affecting both the lines and continuum.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 92: Objects of High Redshift , 1980 , pp. 279 - 282
Copyright
Copyright © Reidel 1980 

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