Strong Lyman-alpha emission in three distant radio galaxies

Details Strong Lyman-alpha emission in three distant radio galaxies Strong Lyman-alpha emission in three distant radio galaxies

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299l...7s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 299, Dec. 1, 1985, p. L7-L11.

Astronomy and Astrophysics

Astrophysics

44

Lyman Alpha Radiation, Radio Galaxies, Red Shift, Ultraviolet Spectra, Active Galaxies, Galactic Nuclei, Quasars, Seyfert Galaxies

Scientific paper

The authors have discovered very strong narrow Lyα emission in the redshifted ultraviolet spectra of three radio galaxies having 1.62 ⪉ z ⪉ 1.82. The spectra of 3C 256 and 3C 239 are almost identical; besides Lyα, the strongest UV emission lines are C IV λ1549, He II λ1640, and C III] λ1909. The galaxy 3C 241 exhibits similar features, but the data are of poorer quality. The luminosity of Lyα is typically ≡2×1044ergs s-1 (H0 = 50 km s-1Mpc-1, q0 = 0), while its intrinsic full width at half-maximum is ≡1500 km s-1. Differences between the average spectrum of the radio galaxies and that of QSOs with z ⪆ 2 are briefly discussed.

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