Photoelectric spectrophotometry of radio galaxies

Abstract

view Abstract Citations (190) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photoelectric spectrophotometry of radio galaxies. Yee, H. K. C. ; Oke, J. B. Abstract The 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. Publication: The Astrophysical Journal Pub Date: December 1978 DOI: 10.1086/156657 Bibcode: 1978ApJ...226..753Y Keywords: Astronomical Photometry; Electrophotometers; Radio Galaxies; Spectrophotometry; Emission Spectra; Line Spectra; Ultraviolet Radiation; Astronomy; Optical Spectra:Radio Galaxies; Radio Galaxies:Spectrophotometry full text sources ADS | data products NED (29)