Astrofísicas: Agujeros negros

  • Noticia
    La erupción de una estrella de neutrones revela la naturaleza de fenómenos solo observados en agujeros negros
    Un equipo científico internacional, liderado por el Instituto de Astrofísica de Canarias (IAC), ha encontrado una estrella de neutrones que roba materia a una...
  • Publicación
    Lens parameters for Gaia18cbf - a long gravitational microlensing event in the Galactic plane
    Context. The timescale of a microlensing event scales as a square root of a lens mass. Therefore, long-lasting events are important candidates for massive...
  • Publicación
    M31GC J004234+405709 (Bol 117) Observed by Chandra Is a New Transient X-Ray Source in M31: CXOM31 J004234.2+405709
    In ATel #1815 we erroneously associated the globular cluster M31GC J004234+405709 (Bol 117) with object s1-1 from Williams et al. (2006, ApJ 643, 356). Bol 117...
  • Publicación
    Magnitudes of X-ray Nova XTE J1650-500 in Quiescence
    Observations of the optical counterpart to XTE J1650-500 with the Magellan 1 telescope find it fainter than expected based on reports of it's possible detection...
  • Publicación
    Mass Measurements of Stellar and Intermediate-Mass Black Holes
    We discuss the method, and potential systematic effects therein, used for measuring the mass of stellar-mass black holes in X-ray binaries. We restrict our...
  • Publicación
    Mass Ratio Determination from H α Lines in Black Hole X-Ray Transients
    We find that the mass ratio q in quiescent black hole (BH) X-ray transients is tightly correlated with the ratio of the double-peak separation (DP) to the full...
  • Publicación
    MASTER Optical Polarization Variability Detection in the Microquasar V404 Cyg/GS 2023+33
    On 2015 June 15, the Swift space observatory discovered that the Galactic black hole candidate V404 Cyg was undergoing another active X-ray phase, after 25...
  • Publicación
    MAXI J1659-152 is a BH candidate
    We report on a pointed RXTE/PCA observation of the transient source MAXI J1659-152 (Atel #2873,#2874,#2875,#2877,#2880 GCN #11296,#11299, #11307 - initially...
  • Charla
    Measuring Black Hole Spin
    An astrophysical black hole is completely described with just two parameters: its mass and its dimensionless spin. A few dozen black holes have mass estimates...