Astrofísicas: Acreción

  • Publicación
    A 2 h periodic variation in the low-mass X-ray binary Ser X-1

    Spectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ≃2 h periodic variability that is present in the three...

  • Publicación
    A black hole in the X-ray transient XTE J1859+226: the first confirmed with GTC

    We present the results of the analysis of the first black hole confirmed with GTC in the X-ray binary system XTE J1859+226. By combining optical photometry...

  • Publicación
    A black hole X-ray binary at ̃100 Hz: multiwavelength timing of MAXI J1820+070 with HiPERCAM and NICER

    We report on simultaneous sub-second optical and X-ray timing observations of the low-mass X-ray binary black hole candidate MAXI J1820+070. The bright 2018...

  • Publicación
    A carbon dwarf wearing a Necklace: first proof of accretion in a post-common-envelope binary central star of a planetary nebula with jets

    The formation of collimated outflows or jets in planetary nebulae (PNe) is not well understood. There is no evidence for active accretion discs in PNe, making...

  • Publicación
    A clean sightline to quiescence: multiwavelength observations of the high Galactic latitude black hole X-ray binary Swift J1357.2-0933

    We present coordinated multiwavelength observations of the high Galactic latitude (b = +50°) black hole X-ray binary (BHXB) Swift J1357.2-0933 in quiescence...

  • Publicación
    A complex state transition from the black hole candidate Swift J1753.5-0127

    We present our monitoring campaign of the outburst of the black hole candidate Swift J1753.5-0127, observed with the Rossi X-ray Timing Explorer and the Swift...

  • Publicación
    A Detection of Sgr A* in the Far Infrared

    We report the first detection of the Galactic Center massive black hole, Sgr A*, at 100 μm and 160 μm. Our measurements were obtained with PACS on board the...

  • Publicación
    A detection of the donor star of Aquila X-1 during its 2004 outburst?

    Phase-resolved high-resolution optical spectroscopy has revealed narrow NIII and HeII emission lines from the soft X-ray transient Aquila X-1 during its 2004...

  • Publicación
    A dynamical study of the circumstellar gas in UX Orionis

    We present the results of a high spectral resolution (lambda / Delta lambda = 49 000) study of the circumstellar (CS) gas around the intermediate mass, pre-main...