Astrofísicas: Acreción

  • Publicación
    A Strongly Heated Neutron Star in the Transient Z Source MAXI J0556-332
    We present Chandra, XMM-Newton, and Swift observations of the quiescent neutron star in the transient low-mass X-ray binary MAXI J0556-332. Observations of the...
  • Publicación
    A Study of Gravitational Lens Chromaticity Using Ground-based Narrowband Photometry
    We present observations of wavelength-dependent flux ratios for four gravitational lens systems (SDSS J1650+4251, HE 0435-1223, FBQ 0951+2635, and Q 0142-100)...
  • Publicación
    A Study of Gravitational Lens Chromaticity with the Hubble Space Telescope
    We report Hubble Space Telescope observations of six gravitational lenses with the Advanced Camera for Surveys. We measured the flux ratios between the lensed...
  • Publicación
    A TiO study of the black hole binary GRO J0422+32 in a very low state
    We present 53 simultaneous photometric (I band) and spectroscopic (6900-9500Å) observations of GRO J0422+32, taken during 1997 December. From these we determine...
  • Publicación
    A tool to separate optical/infrared disc and jet emission in X-ray transient outbursts: the colour-magnitude diagrams of XTE J1550-564
    It is now established that thermal disc emission and non-thermal jet emission can both play a role at optical/infrared (OIR) wavelengths in X-ray transients...
  • Publicación
    A Variable Mid-infrared Synchrotron Break Associated with the Compact Jet in GX 339-4
    Many X-ray binaries remain undetected in the mid-infrared, a regime where emission from their compact jets is likely to dominate. Here, we report the detection...
  • Publicación
    A VLT-ULTRACAM study of the fast optical quasi-periodic oscillations in the polar V834 Centauri
    Quasi-periodic oscillations (QPOs) of a few seconds have been detected in some polars, the synchronised subclass of cataclysmic systems containing a strongly...
  • Publicación
    A Wildly Flickering Jet in the Black Hole X-Ray Binary MAXI J1535–571
    We report on the results of optical, near-infrared (NIR), and mid-infrared observations of the black hole X-ray binary candidate (BHB) MAXI J1535–571 during its...
  • Publicación
    A `high-hard' outburst of the black hole X-ray binary GS 1354-64
    We study in detail the evolution of the 2015 outburst of GS 1354-64 (BW Cir) at optical, UV and X-ray wavelengths using Faulkes Telescope South/Las Cumbres...