Astrofísicas: Acreción

  • Publicación
    Swift and SALT observations of the multiple outbursts of MAXI J1957+032
    The new recurrent X-ray transient MAXI J1957+032 has had four X-ray outbursts within 16 months, all very briefly detected (lasting
  • Publicación
    Swift J1357.2-0933: a massive black hole in the Galactic thick disc
    Swift J1357.2-0933 is one of the shortest orbital period black hole X-ray transients. It exhibited deep optical dips together with an extremely broad H α line...
  • Publicación
    Swift J1357.2-0933: the faintest black hole?
    Swift J1357.2-0933 is a confirmed very faint black hole X-ray transient and has a short estimated orbital period of 2.8 h. We observed Swift J1357.2-0933 for...
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    Swift J1753.5-0127: The Black Hole Candidate with the Shortest Orbital Period
    We present time-resolved photometry of the optical counterpart to the black hole candidate Swift J1753.5-0127 which has remained in the low/hard X-ray state and...
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    Swift/XRT, Chandra, and XMM-Newton observations of IGR J17091-3624 as it returns into quiescence
    IGR J17091-3624 is a low-mass X-ray binary (LMXB), which received wide attention from the community thanks to its similarities with the bright black hole system...
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    SWSextantis stars: the dominant population of cataclysmic variables with orbital periods between 3 and 4h
    We present time-series optical photometry of five new cataclysmic variables (CVs) identified by the Hamburg Quasar Survey (HQS). The deep eclipses observed in...
  • Publicación
    SY Cnc, a case for unstable mass transfer?
    Intermediate-resolution (0.5-1 Å) optical spectroscopy of the cataclysmic variable (CV) SY Cnc reveals the spectrum of the donor star. Our data enable us to...
  • Publicación
    System mass constraints for the accreting millisecond pulsar XTE J1814-338 using Bowen fluorescence
    We present phase-resolved spectroscopy of the millisecond X-ray pulsar XTE J1814-338 obtained during its 2003 outburst. The spectra are dominated by high...
  • Publicación
    T Pyxidis: The First Short-Period Cataclysmic Variable with a Collimated Jet
    We present the first observational evidence for a collimated jet in a short-period cataclysmic variable system: the recurrent nova T Pyxidis. Optical spectra...