Astrophysical: Black holes

  • Talk
    Non-evolution of black hole mass/luminosity ratio, superluminal motions and other pending problems in QSOs
    1) López-Corredoira & Gutiérrez (2012, RAA, 12, 249): Extremely luminous QSOs exist at high redshift but they are absent at low redshift. Our analyses show that...
  • Publication
    November 2007 Chandra Observations of X-Ray Transients in M31
    As part of our ongoing Chandra/HST M31 transient program we report on two active sources recently detected in two Chandra ACIS observations. Source 1 We present...
  • Publication
    Observational properties of accretion discs: Precessing and warped?
    Over the last 40 years, X-ray astronomy missions have revealed long-term, superorbital periods in a variety of X-ray binaries. These modulations can provide...
  • News
    Observers measure how Andromeda’s central black hole is fed
    A team of scientists led by the Observatory of Munich University and the Instituto de Astrofísica de Canarias have obtained direct visualization of the process...
  • Publication
    On the origin of lithium in the black hole binary V404 Cyg.
    Not Available
  • Publication
    Optical and infrared monitoring of SWIFT J1753.3-0127
    We report preliminary optical/infrared photometry and spectroscopy of the SWIFT J1753.3-0127 transient (ATEL #546, #549) obtained at Fred Whipple Observatory...
  • Publication
    Optical and near-infrared spectroscopy of the black hole transient 4U 1543-47 during its 2021 ultra-luminous state
    We present simultaneous optical and near-infrared spectra obtained during the 2021 outburst of the black hole transient 4U 1543-47. The X-ray hardness-intensity...
  • Publication
    Optical counterpart to IGR J17098-3628
    Following the recent report of a possible radio counterpart to the X-ray transient IGR J17098-3628 (ATEL #490), we re-investigated our Magellan I-band exposures...
  • Publication
    Optical ID of CXOM31 J004253.1+411422, a bright Black Hole X-ray Nova in M31
    We report the likely optical ID of the bright transient recently discovered in M31, CXOM31 J004253.1+411422 (Henze et al, ATEL #2356). With a peak X-ray...