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Photoelectric spectrophotometry of radio galaxiesThe absolute energy distributions from 3200 to 10,000 A of 26 3CR radio galaxies are determined on the basis of spectrophotometric observations with the multichannel spectrometer of the Hale 5-m telescope. It is found that there is a continuous range of emission-line characteristics and UV excess in the sample and that a strong correlation exists between the nonthermal component luminosity and hydrogen emission, which favors the hypothesis that direct photoionization by the nuclear radiation is responsible for the emission lines observed. Calculations are performed which show that in almost all cases the power-law component model provides sufficient UV photons to produce the observed H-beta line. Indications are obtained that the optical nuclear component is related to the radio emission in some complex manner and that strong radio galaxies tend to be accompanied by UV excess and emission lines.
Document ID
19790032893
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Yee, H. K. C.
(Hale Observatories Pasadena, CA, United States)
Oke, J. B.
(Hale Observatories Pasadena, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
December 15, 1978
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
79A16906
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-134
Distribution Limits
Public
Copyright
Other

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