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First results of an international multisite multitechnique campaign on o micron And

Published online by Cambridge University Press:  26 May 2016

J.P. Sareyan ,
J. Chauville ,
D. Briot ,
S.J. Adelman ,
M. Alvarez ,
I. Balega ,
Y. Balega ,
D. Bardin ,
I. Belkin  and
D. Bonneau
...Show all authors
J.P. Sareyan
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France
J. Chauville
Affiliation:
2 Observatoire de Meudon, 92195 Meudon Cedex, France
D. Briot
Affiliation:
3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
S.J. Adelman
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
M. Alvarez
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
I. Balega
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
Y. Balega
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
D. Bardin
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
I. Belkin
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
D. Bonneau
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
M. Bossi
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
V. Desnoux
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
M. Espoto
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
R. Fried
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
S. Gonzalez-Bedolla
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
X.Z. Guo
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
Y.L. Guo
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
J.X. Hao
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
L. Huang
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
A. Klotz
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
N. Leister
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
F. Morand
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
D. Mourard
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
F. Vakili
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
F. Valera
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France
F.Y. Zhao
Affiliation:
1 Observatoire de la Cote d'Azur, 06304 Nice Cedex 04, France 2 Observatoire de Meudon, 92195 Meudon Cedex, France 3 Observatoire de Paris, Av.de l'Observatoire, 75014 Paris, France

Extract

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Omicron Andromedae is a multiple system of at least four stars: a B ↔Be star (component A), a spectroscopic binary (components B1–B2) and a close companion (component a). According to several studies (see Hill et al. 1988, 1989):

  1. - the distance between A and the B1–B2 system decreased from 0.39″ in 1975 to 0.25″ in 1987 (McAlister and Hartkopf 1988)

  2. - the few previous speckle measurements of component a have shown the possibility of a 3.7 years orbit around A, according to the 1975 to 1984 observations (mean distance 0.05″). The calculations with this 3.7 yr orbit lead to the prediction of a maximum distance of 0.77″ at 1992.738, i.e. at the end of september 1992, with a North-South orientation.

Type
5. Be Stars: Spectroscopy and Photometry
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 282 - 283
Copyright
Copyright © Kluwer 1994 

References

Hill, G.M., Walker, G.A.H., Dinshaw, N., Yang, S., Harmanec, P.: 1988, PASP 100, 243 CrossRefGoogle Scholar
Hill, G.M., Walker, G.A.H., Yang, S., Harmanec, P.: 1989, PASP 101, 258 Google Scholar
Mac Alister, H.A., Hartkopf, W.I.: 1988, 2nd Catalogue of Interferometric measurements of binary stars (Georgia State Univ. Atlanta, 30303 USA) ,Google Scholar
Sareyan, J.P., Gonzalez-Bedolla, S., Chauville, J., Morel, P.J., Alvarez, M.: 1992, Astron. Astrophys. 257, 567 Google Scholar