Astrophysical: Black holes

  • Publication
    Optical Spectroscopy of XTE J1817-330 in Outburst
    A single 30 min high-resolution spectrum of the optical counterpart to the black hole candidate XTE J1817-330 (ATEL #714, #733) was acquired with the MIKE...
  • Publication
    Optical studies of V404 Cyg, the X-ray transient GS 2023+338. IV. The rotation speed of the companion star.
    Not Available
  • Publication
    Optical variability in MAXI J1659-152
    The newly identified black hole candidate X-ray binary MAXI J1659-152 (ATel #2873, #2881, GCN #11307), originally designated GRB100925A (GCN #11296) has now...
  • Publication
    Optical/IR flux fading rapidly in GX 339-4: OIR jet quenching
    The transient black hole candidate GX 339-4 is currently softening in X-ray, making a transition out of the hard state (ATel #2545). We are monitoring the...
  • Publication
    Orphan optical flare as SOSS emission afterglow, localization in time
    We report on MASTER optical observations of an afterglow-like optical and X-ray transient AT2021lfa/ZTF21aayokph. We detected the initial steady brightening of...
  • Publication
    Phase-dependent Study of Near-infrared Disk Emission Lines in LB-1
    The mass, origin, and evolutionary stage of the binary system LB-1 have been intensely debated, following the claim that it hosts an ∼70M ☉ black hole, in stark...
  • Publication
    Populations of evolved massive binary stars in the Small Magellanic Cloud: I. Predictions from detailed evolution models
    Context. The majority of massive stars are born with a close binary companion. How this affects their evolution and fate is still largely uncertain, especially...
  • Publication
    Populations of evolved massive binary stars in the Small Magellanic Cloud: II. Predictions from rapid binary evolution
    Context. Massive star evolution plays a crucial role in astrophysics; however, its study is subject to large uncertainties. This problem becomes more severe by...
  • Talk
    Probing the early Universe with gravitational Wave Background
    We will review both theoretical and obsevational aspects of gravitational wave backgrounds of cosmological origin. We will present a classifcation of...