Astrophysical: Extragalactic radio sources

  • Publication
    An idealized model for dust accretion in active galactic nuclei

    With an adequate supply of matter, the inward drifting of dust particles induced by the Poynting-Robertson effect can lead to the formation of a shell or disk...

  • Publication
    Observations of three BL Lacertae objects - Constraints on inhomogeneous relativistically beamed jet models

    Multifrequency observations are presented of three BL Lac objects, including the first UV measurements of 0912 + 297 and 1219 + 285. An eight day optical flare...

  • Publication
    On the optical variability of the QSO PKS 2128-123

    Although the QSO PKS 2128 - 123 appears as highly variable in the I band, with Delta-I of up to 1.69 mag, it is a moderate amplitude variable object in the...

  • Publication
    Radio to optical spectral index variations along the M87 jet

    CCD photometry and MERLIN observations of M87 (Virgo A) have been used to study the variations of the radio to optical spectral index along the jet. In general...