Astrophysical: Wolf-Rayet stars

  • Publication
    A spectrophotometric study of the peculiar young open cluster Berkeley 87

    A spectrophotometric study of the peculiar open cluster Berkeley 87 is presented; the measurements show that most of the members are young, heavily reddened OB...

  • News
    Astronomers discover first supernova explosion of a Wolf-Rayet star

    An international study, with the participation of researchers from the Gran Telescopio Canarias (GTC or Grantecan) affiliated to the Instituto de Astrofísica de...

  • Publication
    Chemical abundances of the WR-ring nebulae NGC 2359 and RCW 78

    This paper reports on extensive spectroscopic observations of the WR-ring nebulae NGC 2359 and RCW 78, respectively, excited by the WN5 stars HD 56925 and WN8...

  • Publication
    Condensation of dust around the Wolf-Rayet star WR 125

    Infrared photometry of the WC7-type Wolf-Rayet star WR 125 (MR 93) in 1981-91 shows a 10-fold rise in the 3-4 micron flux during 1990-91. This, together with...

  • Publication
    Discovery of two new Wolf-Rayet stars from the AAO/UKST H-alpha survey.

    Not Available

  • Publication
    IRAS 16455-3455 and IRAS 15154-5258 - Two new southern planetary nebulae

    The identification of two new southern planetary nebulae, IRAS 16455-3455 and IRAS 15154-5258, via low resolution spectroscopy, is reported. IRAS 16455-3455 is...

  • Publication
    On the chemodynamics of Wolf-Rayet ring nebulae - NGC 6888

    Results of a chemodynamical study of the W-R ring nebula NGC 6888 around the WN6 star WR 136 are presented; the observations combine high spatial and spectral...

  • Publication
    On the O/Fe versus Fe/H relationship and the progenitors of type I supernovae

    The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar...

  • Publication
    On the widths of emission lines in spectra of WC9 stars of different kinds

    Emission lines in the spectra of WC9 stars have been studied. It is shown that there are clear differences between the spectra of BD + 30 3639 and the central...