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A correlation between the radio and optical morphologies of distant 3Cr radio galaxies

McCarthy, Patrick J. and van Breugel, Wil and Spinrad, Hyron and Djorgovski, S. (1987) A correlation between the radio and optical morphologies of distant 3Cr radio galaxies. Astrophysical Journal, 321 . L29-L33. ISSN 0004-637X. doi:10.1086/185000.

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We report the discovery of a strong correlation between the radio and optical morphologies of distant (z ≥ 0.6), powerful radio galaxies. The isophotal axes of highly elongated distant 3CR galaxies, measured both in the light of stellar continua and extranuclear emission lines, tend to align with the radio source axes. This correlation suggests that there is a profound relation between these extremely powerful radio sources and their host galaxies. We propose that the most natural explanation of the effect is that the radio jets and/or backflows from the radio lobes interact with the interstellar media of the gas-rich galaxies associated with 3CR sources and stimulate large-scale star formation. This proposed mechanism can provide a physical explanation for the high star formation and evolution rates of 3CR galaxies at large look-back times found in earlier photometric studies. Thus, the formation and evolution of powerful radio galaxies and radio-quiet giant ellipticals may differ substantially.

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Djorgovski, S.0000-0002-0603-3087
Additional Information:© 1987 The American Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1987 June 5; accepted 1987 July 20. Based in part on data obtained at Lick Observatory, University of California. We would like to thank the staffs of the Kitt Peak National Observatory, the Canada-France-Hawaii telescope and the Lick Observatory for their expert assistance with the observations. We wish to express our thanks to M. Dickinson for help in CCD reductions and photometry, and to S. Kulkami for the Palomar 5 m images of 3C 437. H. S. and P. McC. acknowledge support from NSF grant AST85-13416. W. v. B. acknowledges support from NSF grant AST84-16177, and S. D. acknowledges partial support from Harvard University.
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NSFAST 85-13416
NSFAST 84-16177
Harvard UniversityUNSPECIFIED
Record Number:CaltechAUTHORS:20190805-100410954
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97633
Deposited By: Tony Diaz
Deposited On:05 Aug 2019 17:59
Last Modified:16 Nov 2021 17:33

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