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3 results on '"E. Chapellier"'

2. Period Variations in the Beta Cep Star β Cru

Author

J. C. Valtier, E. Chapellier, and J. M. Le Contel

Subjects
Radial velocity, Physics, Amplitude, Period (gene), Beta (velocity), Cru, Astrophysics, Star (graph theory), Orbital period
Abstract

α Lup (HR 5469) is a multiperiodic beta Cep star. According to Shobbrook (1979) and Lampers & Goossens (1982) the main period (P=0.25985 day) corresponding to the radial mode is constant. The amplitude of the secondary period, attributed to a non radial mode, is so small that it does not affect the determination of maximum dates. more...

Published
1994
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3. Photometric and Spectroscopic Observations of the 53 Per Star: ζ CAS

Author

S. Gonzalez-Bedolla, E. Chapellier, J. M. Le Contel, D. Le Contel, and H. Sadsaoud

Subjects
Radial velocity, Physics, Astrophysics, Star (graph theory), Line (formation), Luminosity
Abstract

ζ Cas (HR 153, mv=3.66, vsini=18 kms-1) was classified as a 53 Per variable by Smith (1980). He detected variations in the profile of the 4552 A Si III line with a period of 0.9 day. The radial velocity and the luminosity were observed to be constant by Abt & Levy (1978) and by Jerzykiewicz (1993) respectively. more...

Published
1994
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