Fine analysis of the intermediate helium-star CPD-46 deg 3093

Details Fine analysis of the intermediate helium-star CPD-46 deg 3093 Fine analysis of the intermediate helium-star CPD-46 deg 3093

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26as...50...77g&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 50, Oct. 1982, p. 77-85.

Astronomy and Astrophysics

Astrophysics

Atmospheric Models, B Stars, Helium, Stellar Atmospheres, Stellar Rotation, Stellar Spectra, Abundance, Main Sequence Stars, O Stars, Stellar Evolution, Tables (Data)

Scientific paper

A fine analysis of the intermediate He-star CPD 46 deg-3093 was carried out by means of LTE model atmosphere techniques and spectroscopy of 20 A/mm spectrograms in the range of 3600-4900 A. The derived parameters include an effective temperature of 26,000 K, log g equals 3.95, n(He) equals 0.27, and radial velocity of 50 + or -10 km/s. The minimum distance is 1400 pc, the minimum mass is 3.7 solar masses, and the minimum radius is 3.4 solar radii. Apart from H and He, the elements Si, Mg, and O show abundance anomalies, with O being extremely underabundant. Deviations from circular velocity in the galaxy are small. The star shows variability in H-1 and He-1 lines like Be-stars. Most probably it is a young object near the main sequence and is a rapidly rotating variable He-rich star like Sigma Ori E.

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