Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181..293s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 2, July 1987, p. 293-299.
Astronomy and Astrophysics
Astronomy
9
High Dispersion Spectrographs, Peculiar Stars, Stellar Spectra, Supergiant Stars, Variable Stars, Absorption Spectra, Emission Spectra, Energy Distribution, Line Spectra, Stellar Envelopes, Ultraviolet Astronomy
Scientific paper
The luminous emission-line star HD 37836 of the LMC has been studied using high-dispersion spectra in the UV and in the optical. In addition, IUE low-dispersion spectra and UBVRIJHKL photometry have been used to study the energy distribution. The emission-line spectrum of the star is very peculiar. Its UV absorption-line spectrum is more normal and indicates that HD 37836 is a late O type supergiant. Specifically, strong stellar-wind lines with an edge velocity of ≈2400 km s-1 have been found. The most likely explanation for the variety of velocities which are found appears to be a disk surrounding the star. It is shown that the continuum energy distribution is in agreement with the presence of a disk. The two LMC stars HDE 269445 and Hen S131 have similar energy distributions and emission-line spectra and may thus represent other cases of luminous, hot supergiants surrounded by gaseous disks.
Stahl Otmar
Wolf Bernd
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