Astrophysical: Circumstellar matter

  • Publication
    The 2004-2006 Outburst and Environment of V1647 Ori
    We studied the brightness and spectral evolution of the young eruptive star V1647 Ori during its recent outburst in the period 2004 February-2006 September. We...
  • Publication
    The 2008 Outburst of EX Lup—Silicate Crystals in Motion
    EX Lup is the prototype of the EXor class of eruptive young stars. These objects show optical outbursts which are thought to be related to runaway accretion...
  • Publication
    The AG Carinae nebula: abundant evidence for a red supergiant progenitor?
    AG Carinae is a massive, evolved supergiant which is thought to be in transition from an O star to a Wolf-Rayet (WR) star and is currently identified as a...
  • Publication
    The age of the carina young association and potential membership of HD 95086
    Carina is a nearby young stellar association. So far, only a small number of stars have been clearly identified as members of this association. In this paper...
  • Publication
    The chemical composition of the post-asymptotic giant branch F supergiant CRL 2688
    We present an analysis of a high-resolution (R ˜ 50 000) optical spectrum of the central region of the protoplanetary nebula CRL 2688. This object is thought to...
  • Publication
    The circumstellar environment of IRAS 05327+3404
    We continue our study of the young stellar object associated with IRAS 05327+3404. We have determined the spectral type of the central star to be K2. We show...
  • Publication
    The circumstellar medium of the peculiar supernova SN1997ab
    We report the detection of the slow-moving wind into which the compact supernova remnant SN 1997ab is expanding. Echelle spectroscopy provides clear evidence...
  • Publication
    The Double Dust Envelopes of R Coronae Borealis Stars
    The study of extended, cold dust envelopes surrounding R Coronae Borealis (RCB) stars began with their discovery by the Infrared Astronomical Satellite. RCB...
  • Publication
    The effect of dust obscuration in RR Telescopii on optical and IR long-term photometry and Fe II emission lines
    Aims.Infrared and optical photometric and spectroscopic observations of the symbiotic nova RR Tel are used to study the effects and properties of dust in...