Spectroscopy and photometry of the distant radio galaxy 3C 343.1
Spectrophotometry of the faint radio galaxy 3C 343.1 shows a strong emission line in the red. If identified with ⋋3727 of [O II], it yields z = 0.750. The identification is aided by noting that ⋋3869 of [Ne III] is marginally visible. The optical continuum is relatively blue in color; it is likely to be caused by a population of stars younger than often found in nearby E galaxies. By comparison with other distant galaxies of established z, the isophotal diameter of about 7" measured for 3C 343.1, is consistent with the proposed redshift and corresponds to a linear size of 70 kpc and to a surface brightness of µτ ≈ 26 mag arcsec^(-2).
Additional Information© 1977 American Astronomical Society. Received 1977 May 17; accepted 1977 June 17. Spinrad wishes to acknowledge the support of the NSF through grants AST 72-05061 and thanks John Stauffer for aid in observing and reductions. He also thanks Drs. Osterbrock and H. E. Smith for helpful discussions. Westphal and Kristian are supported in part by NSF grant GP-36450X.
Published - 1977ApJ___216L__87S.pdf