Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..428p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 428-434. Research supported by Royal Society and SE
Astronomy and Astrophysics
Astrophysics
3
Early Stars, Magellanic Clouds, Supergiant Stars, Ultraviolet Spectra, Visible Spectrum, H Alpha Line, Variable Stars, Wolf-Rayet Stars
Scientific paper
Low-resolution IUE UV and optical observations are presented of HD 269216, the visually brightest member of the LH 39 association in the LMC. Although the UV and optical line spectra are broadly consistent with a B 8 Ia spectral type for HD 269216, the classification is complicated by several discrepancies. The observed UV continuum-flux distribution is much shallower than evident for 'normal' late B supergiants, with no pronounced Balmer jump observed in HD 269216. Broad emission lines of hydrogen, with for example a FWHM of H-beta of about 650 km/s, and possible He-I emission are peculiarities in the optical spectrum. A stellar luminosity places HD 269216 in the same location in the H-R diagram as R 71 in minimum state. The two stars are compared, and HD 269216 appears to warrant further monitoring as a possible S Dor-type variable.
Prinja Raman K.
Schild Hans
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