2.2 micron image of 3C 368 at Z = 1.13, a galaxy with aligned radio and stellar axes

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view Abstract Citations (97) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS 2.2 Micron Image of 3C 368 at z=1.13, a Galaxy with Aligned Radio and Stellar Axes Chambers, K. C. ; Miley, G. K. ; Joyce, R. R. Abstract We present a K-band infrared image of the z = 1.13 radio galaxy 3C 368. This galaxy is one of the brightest examples of the recently discovered phenomenon of alignment between the optical and radio axes of powerful distant radio galaxies. Our observations show that the infrared morphology is also elongated and aligned along the optical and radio axes. However, it is not coincident with the radio emission. We discuss various mechanisms for producing the infrared and optical flux, and the resultant constraints on the origin of the alignment effect in high-redshift radio galaxies. The most likely explanation is that the emission is produced mainly by young stars formed by interaction of the radio source with the interstellar medium. The infrared flux is then interpreted as dominated by a population of red supergiants. Independent of the origin of the emission, the observed alignment implies that powerful radio galaxies at high redshifts are distinct from giant ellipticals, even in the infrared. Hence, attempts to derive a cosmological "standard candle" using studies which combine these two types of galaxies are likely to be invalid. Publication: The Astrophysical Journal Pub Date: June 1988 DOI: 10.1086/185180 Bibcode: 1988ApJ...329L..75C Keywords: Cosmology; Galactic Evolution; Infrared Imagery; Interstellar Matter; Radio Galaxies; Red Shift; Morphology; Radio Emission; Radio Sources (Astronomy); Star Formation; Astrophysics; COSMOLOGY; GALAXIES: EVOLUTION; GALAXIES: REDSHIFTS; GALAXIES: STELLAR CONTENT; INFRARED: GENERAL; RADIO SOURCES: GALAXIES full text sources ADS | data products SIMBAD (5) NED (3)