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The Detection of a Large, Powerful FR I Radio Galaxy in a Spiral Host

Published online by Cambridge University Press:  25 May 2016

Michael J. Ledlow
Affiliation:
University of New Mexico, Institute for Astrophysics, Dept of Physics & Astronomy, Albuquerque, NM USA
Frazer N. Owen
Affiliation:
National Radio Astronomy Observatory, Socorro, NM USA
William C. Keel
Affiliation:
University of Alabama, Dept of Physics & Astronomy, Tuscaloosa, AL USA

Extract

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We report the detection of a FR I-like radio galaxy with a total extent of more than 200 kpc in a disk-dominated host. Traditional wisdom maintains that these types of radio sources are only found in elliptical hosts. We confirm the optical classification of this galaxy from deep, multicolor optical/NIR imaging and the detection of a spiral arm, an optical rotation curve, and line-ratios in the disk consistent with HII regions and star formation. At 20cm, we find a 36kpc knotty, jet extending into the southern lobe. At 3.6cm we detect a kpc-scale jet with the same position angle. With the exception of the radio source, this galaxy appears to be a fairly ordinary, dusty, star-forming spiral, with some evidence for a weak, obscured, AGN.

Type
Nuclear Activity
Copyright
Copyright © Kluwer 1999