First VLBA Images of the Nuclei in 3CR Lobe-dominated Quasars
Abstract
We report the first VLBA images of the nuclei in eight objects from the 3CR complete sample of 25 lobe-dominated quasars (LDQs): 3C 207, 3C 208, 3C 212, 3C 245, 3C 249.1, 3C 263, 3C 270.1, and 3C 275.1. These images reveal core-jet structures of considerable extent and complexity. In combination with earlier VLBI work on the 3CR LDQ sample, the partial distribution of apparent parsec-scale jet speeds for ten objects is relatively flat up to ~ 5h^(−1) c, or perhaps even ~ 10h^(−1) c. While this is not inconsistent with simple beaming models and quasar-FR II radio galaxy unification, it is crucial to obtain the complete speed distribution for truly definitive tests. Work is in progress on multi-frequency, dual-polarization, and phase-referencing VLBA observations on selected objects in the sample.
Additional Information
© 1998 Astronomical Society of the Pacific. DHH is grateful for support under NSF grant AST-9422075, and wishes to acknowledge the significant contributions to this work by Trinity undergraduates Erika Barth, Philip Beyer, Lara Cross, and Ellen Phifer. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under a cooperative agreement by Associated Universities, Inc.Attached Files
Published - first_vlba_images_of_the_nuclei_in_3cr_lobedominated_quasars.pdf
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Additional details
- Eprint ID
- 91662
- Resolver ID
- CaltechAUTHORS:20181210-160421905
- NSF
- AST-9422075
- Created
-
2018-12-11Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- IAU Symposium Proceedings Series
- Series Volume or Issue Number
- 164