Physics
Scientific paper
Jul 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.250..308s&link_type=abstract
Nature, Volume 250, Issue 5464, pp. 308 (1974).
Physics
13
Scientific paper
NEAR the position of the radio source 4C11.50, Wampler et al.1 have found a pair of QSOs separated by 4.8 arc s, with redshifts of 0.4359 and 1.901, respectively. Hazard et al.2 have noted the presence of a 19-mag galaxy, 10 arc s west of the brighter, lower redshift QSO (4C11.50a); a plate obtained with the 224-cm telescope at Mauna Kea shows that this `galaxy' is actually a close group of three galaxies. Several spectrograms have been obtained at 190 and 50 Å mm-1, with the two brighter galaxies aligned along the slit at position angle 33°. There is a continuum break downwards to the blue at about 5,700 Å, and an emission line at 5,344.9 Å these features can be identified with the long wavelength edge of the H and K lines, and with the [O II] λ3,727 doublet, respectively. Assuming an average wavelength of 3,727.4 Å for the [O II] doublet, the redshift is 0.4340 (not corrected for galactic rotation). The two galaxies on the slit are separated by about 2.5 arc s and are not well resolved on the spectrogram, so it is not certain to which one the redshift refers.
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