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Low resolution infrared spectra of quasars

Soifer, B. T. and Neugebauer, G. and Oke, J. B. and Matthews, K. (1980) Low resolution infrared spectra of quasars. In: Objects of High Redshift. IAU Symposia. No.92. D. Reidel , Dordrecht, pp. 279-282. ISBN 978-90-277-1118-2.

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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.

Item Type:Book Section
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Additional Information:© 1980 by the IAU. This work was supported by NSF grant AST77-20516 and NASA grant NGL 05-002-207.
Funding AgencyGrant Number
NASANGL 05-002-207
Series Name:IAU Symposia
Issue or Number:92
Record Number:CaltechAUTHORS:20170308-104936898
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74892
Deposited By: Tony Diaz
Deposited On:08 Mar 2017 19:09
Last Modified:03 Oct 2019 16:44

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