Astrophysical: Jets

  • Publication
    Strong lensing reveals jets in a sub-microJy radio-quiet quasar
    We present e-MERLIN and European VLBI Network observations which reveal unambiguous jet activity within radio-quiet quasar HS 0810+2554. With an intrinsic flux...
  • Publication
    Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI
    Context: NRAO 150, a compact and bright radio to mm source showing core/jet structure, has been recently identified as a quasar at redshift z = 1.52 through a...
  • Publication
    Testing two-component models on very high-energy gamma-ray-emitting BL Lac objects
    Context. It has become evident that one-zone synchrotron self-Compton models are not always adequate for very high-energy (VHE) gamma-ray-emitting blazars...
  • Publication
    The 1989 and 2015 outbursts of V404 Cygni: a global study of wind-related optical features
    The black hole transient V404 Cygni exhibited a bright outburst in June 2015 that was intensively followed over a wide range of wavelengths. Our team obtained...
  • Publication
    The 2010 Very High Energy γ-Ray Flare and 10 Years of Multi-wavelength Observations of M 87
    The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 - 6) × 109 M &sun;) provides a unique opportunity to...
  • Publication
    The Active Jet in NGC 4258 and Its Associated Shocks
    We present images and spectra of the active jet and anomalous arms on subparsec through kiloparsec scales in the LINER/Seyfert galaxy NGC 4258 (M106). New VLBA...
  • Publication
    The awakening of BL Lacertae: observations by Fermi, Swift and the GASP-WEBT
    Since the launch of the Fermi satellite, BL Lacertae has been moderately active at γ-rays and optical frequencies until 2011 May, when the source started a...
  • Publication
    The beamed jet and quasar core of the distant blazar 4C 71.07
    The object 4C 71.07 is a high-redshift blazar whose spectral energy distribution shows a prominent big blue bump and a strong Compton dominance. We present the...
  • Publication
    The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration
    A neutrino with energy ˜290 TeV, IceCube-170922A, was detected in coincidence with the BL Lac object TXS 0506+056 during enhanced gamma-ray activity, with...