Astrofísicas: Agujeros negros

  • Noticia
    La sombra del disco de un agujero negro revela cómo devora materia
    Cuando el brillo de MAXI J0637−430, un sistema binario con un agujero negro, comenzó a disminuir tras una gran erupción, ocurrió algo inesperado: las zonas...
  • 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...