Abstract
ABSTRACT The spectroscopic data collected on the HD 200925 variable star in the uvby and beta systems have been analyzed. The results indicate that this variable is multiperiodic, with a reddening value, E(b-y), equal to 0.029 mag. The reddening-corrected normals for y, (b-y), and c1 yielded a mean effective temperature of 7020 K, mean log surface gravity of 3.44, and a mean bolometric magnitude of 0.8 mag. A preliminary mean radius of 4.1 solar radii has been determined. The m1 data show that the blanketing is high, but this index varied in an anomalous way which precluded a definitive determination of Fe/H. Two possible explanations are considered for the behavior of the m1 index: (1) a high microturbulence excited by the secondary pulsation mode, and (2) the Am/Fm phenomenon.
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