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within Science, Humanities and Social Sciences, multidisciplinary Remove this filter R. S. Simon Remove this filter

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  1. No Access

    Article

    A disrupted radio jet inside the host galaxy of the quasar 3C48

    THE nearby quasar 3C48 was the first to be optically identified1, and its redshift, z = 0.368 (ref. 2), was the second, after that of 3C2733, to be determined. Despite this pedigree, its detailed radio structure ...

    P. N. Wilkinson, A. K. Tzioumis, J. M. Benson, R. C. Walker, R. S. Simon… in Nature (1991)

  2. No Access

    Article

    Low-frequency variability and predicted superluminal motion in 3C147

    VLBI observations of 3C147 reveal that its core is a low-frequency variable radio source which has brightened by a factor of 2 in 6 years. In combination with X-ray observations, this implies that bulk relativ...

    R. S. Simon, A. C. S. Readhead, A. T. Moffet, P. N. Wilkinson, B. Allen… in Nature (1983)

  3. No Access

    Article

    Superluminal expansion of quasar 3C273

    Maps of the radio structure of 3C273 show directly that it expanded with an apparent velocity 10 times the speed of light from mid-1977 to at least mid-1980.

    T. J. Pearson, S. C. Unwin, M. H. Cohen, R. P. Linfield, A. C. S. Readhead… in Nature (1981)