The peculiar emission-line supergiant HD 37836.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1987
- Bibcode:
- 1987A&A...181..293S
- Keywords:
-
- High Dispersion Spectrographs;
- Peculiar Stars;
- Stellar Spectra;
- Supergiant Stars;
- Variable Stars;
- Absorption Spectra;
- Emission Spectra;
- Energy Distribution;
- Line Spectra;
- Stellar Envelopes;
- Ultraviolet Astronomy;
- Astrophysics