Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...242..410l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 242, no. 2, Feb. 1991, p. 410-416.
Astronomy and Astrophysics
Astrophysics
2
Blue Stars, Stellar Luminosity, Variable Stars, Wolf-Rayet Stars, Astronomical Photometry, Hertzsprung-Russell Diagram, Radial Velocity, Stellar Models
Scientific paper
Advantage is taken of the discovery that a previously classified P Cyg star of the Large Magellanic Cloud is in fact a subluminous genuine S Dor type star to rediscuss the WR and LBV candidates of its environment. From their location and radial velocity (when measured), all these stars are physically linked with the red supergiants of the Shapley II superassociation, whose ages range from 7 to 12 Myr. The large errors in the observational determination of luminosity of all kinds of massive stars are emphasized and their different origins discussed. The WRs and LBVs of the field studied may have initial masses up to 45 solar masses and be slightly younger than the red supergiants; however if small bolometric corrections for WR are credited (this is advisable for WN 8 stars), a few WRs are definitely subluminous.
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