A radial-velocity study of the nitrogen O supergiant HD 105056

Details A radial-velocity study of the nitrogen O supergiant HD 105056 A radial-velocity study of the nitrogen O supergiant HD 105056

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..284w&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, June 1980, p. 284-287.

Astronomy and Astrophysics

Astronomy

12

Nitrogen, O Stars, Periodic Variations, Radial Velocity, Stellar Spectrophotometry, Supergiant Stars, Absorption Spectra, Binary Stars, Line Spectra, Spectrum Analysis, Stellar Mass, Stellar Winds, Wind Velocity

Scientific paper

An investigation of the radial velocity of the ON supergiant HD 105056 has shown it to be variable with a small range (30-40 km/sec) and short time scale (a few days), but no satisfactory periodicity has been found in the variations. Evidence is found for a stellar wind of variable magnitude, and there are small absorption-line intensity changes in the spectrum possibly with a very short time scale (not greater than 1 hour). Either the star is not a binary and the variations arise entirely in the stellar wind; or, if it is a binary, it must have a low-mass companion and/or low inclination, and the small-amplitude velocity period is obscured by the combination of measurement errors and stellar wind effects.

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