Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26..104v&link_type=abstract
Astronomy Letters, vol. 26, p. 104-115 (2000)
Astronomy and Astrophysics
Astronomy
6
Scientific paper
Two CCD spectra of the star V1016 Ori were obtained with the echelle spectrograph of the 6-m (BTA) telescope. An analysis of these spectra allowed us to estimate the star's atmospheric parameters (T_eff = 29700 K, log g = 4.4) and projected rotational velocity (V sin i = 60 km/s) and to determine its chemical composition. Chemical anomalies were found. The Fe abundance is nearly solar; He, C, O, Mg, Al, Si are underabundant; and Ne, S, Zn are overabundant. The "spectroscopic" radius of the primary is in satisfactory agreement with its radius determined from the light and radial-velocity curves if the small star is assumed to lie in front of the giant star during an eclipse. The paradox of the primary's anomalous radius is thus resolved. A table of line equivalent widths and a portion of the star's spectrum are given in Appendices 1 and 2.
Klochkova Valentina G.
Vitrichenko Eh. A.
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