Astrophysical: Circumstellar matter

  • Publication
    A search for hydrogenated fullerenes in fullerene-containing planetary nebulae
    Detections of C60 and C70 fullerenes in planetary nebulae (PNe) of the Magellanic Clouds and of our own Galaxy have raised the idea that other forms of carbon...
  • Publication
    A young binary brown dwarf in the R-CrA star formation region
    We present imaging and spectroscopic observations with HST (WFPC2, ACS/HRC and STIS), VLT (FORS2) and Keck (HIRES) of the dM 8 ultra-cool dwarf DENIS-P J185950...
  • Publication
    Abell 41: shaping of a planetary nebula by a binary central star
    We present the first detailed spatiokinematical analysis and modelling of the planetary nebula Abell 41, which is known to contain the well-studied close-binary...
  • Publication
    ALMA spectrum of the extreme OH/IR star OH 26.5+0.6
    We present ALMA band 7 data of the extreme OH/IR star, OH 26.5+0.6. In addition to lines of CO and its isotopologues, the circumstellar envelope also exhibits a...
  • Publication
    An Infrared Diffuse Circumstellar Band? The Unusual 1.5272 Micron DIB In the Red Square Nebula
    The molecular carriers of the ubiquitous absorption features called the diffuse interstellar bands (DIBs) have eluded identification for many decades, in part...
  • Publication
    An UXor among FUors: extinction-related brightness variations of the young eruptive star V582 Aur
    The early evolution of Sun-like stars may be interspersed by energetic FU Orionis (FUor) type accretion outbursts. We analysed eight years of photometric and...
  • Publication
    An UXor among FUors: Extinction-related Brightness Variations of the Young Eruptive Star V582 Aur
    V582 Aur is an FU Ori-type young eruptive star in outburst since ∼1985. The eruption is currently in a relatively constant plateau phase, with photometric and...
  • Publication
    Are C60 Molecules Detectable in Circumstellar Shells of R Coronae Borealis Stars?
    The hydrogen-poor, helium-rich, and carbon-rich character of the gas around R Coronae Borealis (RCB) stars has been suggested to be a site for formation of C60...
  • Publication
    Brown Dwarf Disks at Ages of 5-10 Myr
    We present Spitzer/IRAC and MIPS 24 μm observations for 28 brown dwarfs in the Upper Scorpius (UppSco) region. We find a disk fraction of 10.7%+8.7% -3.3%. One...