Abstract
THE radio source DA240 (refs 1 and 2) has been identified3 as a 15-mag elliptical galaxy of redshift z=0.0356, placing it at a distance of 215 Mpc (assuming an Einstein–de Sitter cosmology with c/H0=6,000 Mpc). The total angular extent of the source is approximately 34′, which implies a linear extent of 2.1 Mpc and makes it one of the largest systems known.
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References
Galt, J. A., and Kennedy, J. E. D., Astr. J., 73, 135 (1968).
Bridle, A. H., Davis, M. M., Fomalont, E. B., and Lequeux, J., Astr. J., 77, 405 (1972).
Willis, A. G., Strom, R. G., and Wilson, A. S., Nature, 250, 625 (1974).
Baker, J. R., Preuss, E., and Whiteoak, J. B., Astrophys. Lett., 14, 123 (1973).
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BAKER, J., PREUSS, E., WHITEOAK, J. et al. Observations of the radio galaxy DA240 at 11 cm. Nature 252, 552–553 (1974). https://doi.org/10.1038/252552a0
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DOI: https://doi.org/10.1038/252552a0
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