Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985acasn..26..144l&link_type=abstract
(Acta Astronomica Sinica, vol. 26, no. 2, 1985, p. 144-151) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 9, Dec. 19
Astronomy and Astrophysics
Astrophysics
1
Eclipsing Binary Stars, Peculiar Stars, Radial Velocity, Stellar Spectrophotometry, Supergiant Stars, Variable Stars, F Stars, H Alpha Line, Light Curve, Regression Analysis, Stellar Oscillations
Scientific paper
Results of photoelectric photometry and spectral observations of Epsilon Aur during its 1982-1984 ingress and total eclipse are given. Narrow-band light curves and variations in radial velocity within a night resulting from autoregression analysis all indicate short time scale variations in the F supergiant primary on the order of hours or fractions thereof. Fluctuations with an amplitude of + or - 25 Km/s and a period of 400 d are present in the measured radial velocity of the primary during ingress and totality. Obvious changes in the H-alpha profile were also observed: around the second contact of the total eclipse, there was an emission in the blue wing; while around the third contact of the atmosphere eclipse, there was emission in the red wing.
Cha Guang-Wei
Li Xiang-Yang
liu Xian-Feng
Peng Song-Chuan
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