The Protogalaxy Candidate 3C 256

Details The Protogalaxy Candidate 3C 256 The Protogalaxy Candidate 3C 256

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.2708e&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #27.08; Bulletin of the American Astronomical Society, Vol. 24, p.1163

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Near infrared images of the z=1.819 radio galaxy 3C 256 show it is unusually faint (K=19.1). Nevertheless the rest frame 0.8microns light is highly elongated and aligned with the radio lobes, as are images in the rest frame UV. The blue UV-IR color (R-K=2.4 vs. a flat spectrum value R-K=1.7), lack of a central red core, and dynamically young morphology all suggest that 3C 256 is forming its first major generation of stars and is a good candidate for a protogalaxy. The excellent radio alignment suggests that radio jets triggered this formation. We discuss the case for 3C 256 being a protogalaxy in terms of its broad band SED and UV spectrum.

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