Astrophysical: Black hole physics

  • Publication
    First black hole mass estimation for the quadruple lensed system WGD2038-4008
    Context. The quadruple lensed system WGD2038-4008 (z s = 0.777 ± 0.001) has recently been discovered with the help of new techniques and observations. Black...
  • Publication
    Fundamental parameters of galactic luminous OB stars. II. A spectroscopic analysis of HDE 226868 and the mass of Cygnus X-1.
    We present a spectroscopic analysis of the O9.7 Iab star HDE 226868, which is the optical counterpart of Cygnus X-1. We use this extreme supergiant to test the...
  • Publication
    Global optical/infrared-X-ray correlations in X-ray binaries: quantifying disc and jet contributions
    The optical/near-infrared (OIR) region of the spectra of low-mass X-ray binaries (XBs) appears to lie at the intersection of a variety of different emission...
  • Publication
    H1517+656: The Birth of a BL Lacertae Object?
    H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lac objects known, with extreme emission properties at radio...
  • Publication
    Infrared photometry of Nova MUSCAE 1991 (=GS 1124-68)
    We have obtained an H-band infrared light curve of the low-mass X-ray binary transient Nova Muscae 1991. We model the light curve as being due to the tidal...
  • Publication
    Infrared spectroscopy of V404 Cygni: limits on the accretion disc contamination
    We have obtained for the first time 2.10-2.45 μm infrared spectra of the soft-X-ray transient V404 Cygni. We determine a 95 per cent confidence upper limit to...
  • Publication
    Investigating accretion disk - radio jet coupling across the stellar mass scale
    Relationships between the X-ray and radio behavior of black hole X-ray binaries during outbursts have established a fundamental coupling between the accretion...
  • Publication
    Jet spectral breaks in black hole X-ray binaries
    In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to γ-ray energies, the contribution of the...
  • Publication
    Large-scale radio nebula around the Ultra-Luminous X-ray Source IC 342 X-1
    We present discovery of a radio nebula associated with the ultraluminous X-ray source (ULX) IC 342 X-1 using the Very Large Array (VLA). Taking the surrounding...