Analysis of the spectra of three stars of Theta 1 ORI Trapezium

Details Analysis of the spectra of three stars of Theta 1 ORI Trapezium Analysis of the spectra of three stars of Theta 1 ORI Trapezium

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pazh...14..327i&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 14, April 1988, p. 327-333. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

6

B Stars, O Stars, Radial Velocity, Spectrum Analysis, Stellar Spectra, Eclipsing Binary Stars, Helium, Stellar Rotation

Scientific paper

On the basis of spectrograms obtained with a 2-m telescope with a dispersion of 29 A/mm, the stars in Theta-1 Ori Trapezium (BM Ori, V1016 Ori, and Theta-1 Ori D) are investigated. A two-dimensional spectral classification is presented and the rotational velocities are determined for each star. The radial velocities of V1016 Ori showed a large scatter which was possibly due to nonstationary processes. It is shown that the helium abundance in V1016 Ori is greater than in the sun.

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