Astrophysical: Black holes

  • Talk
    Structure of the Kerr-Schild geometry, beam-like solutions and fluctuations of the black-hole horizon
    Exact solutions of the Einstein-Maxwell equations in the Kerr-Schild formalism are discussed. We show that black hole horizon is unstable with respect to...
  • Publication
    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...
  • Publication
    Swift observations of V404 Cyg during the 2015 outburst: X-ray outflows from super-Eddington accretion
    The black hole (BH) binary V404 Cyg entered the outburst phase in 2015 June after 26 yr of X-ray quiescence, and with its behaviour broke the outburst evolution...
  • Publication
    Swift/XRT follow-up and a refined position of the X-ray transient XTE J1728-295
    Following the report of the newly detected outburst of the transient XTE J1728-295 (possibly IGR J17285-2922 detected by INTEGRAL) in the RXTE PCA bulge scans...
  • Publication
    Testing Mass Determinations of Supermassive Black Holes via Stellar Kinematics
    We investigate the accuracy of mass determinations MBH of supermassive black holes in galaxies using dynamical models of the stellar kinematics. We compare 10...
  • Talk
    The Bowen Survey; detecting donor star signatures in low mass X-ray binaries
    For most persistent low mass X-ray binaries (LMXBs) and transients in outbursts the optical emission is dominated by reprocessing of the X-rays in the outer...
  • Publication
    The evolution of rapid optical/X-ray timing correlations in the initial hard state of MAXI J1820+070
    We report on a multiepoch campaign of rapid optical/X-ray timing observations of the superbright 2018 outburst of MAXI J1820+070, a black hole low-mass X-ray...
  • Talk
    The infinite symmetries of event horizons: the case of black holes embedded in strong magnetic fields
    In this talk, I will review the recently discovered infinite-dimensional symmetries that emerge in the near horizon region of black hole horizons. I will...
  • Publication
    The long-term optical evolution of the black hole candidate MAXI J1659-152
    We present 5 yr of optical and infrared data of the black hole candidate MAXI J1659-152 covering its 2010 outburst, decay, and quiescence. Combining optical...