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A Transient Shock-Wave in the Shell of the Be Star HD 184279

Published online by Cambridge University Press:  23 September 2016

D. Ballereau  and
J. Chauville
D. Ballereau
Affiliation:
Observatoire de Paris - Meudon, 5 Place J. Janssen, 92195 - Meudon Principal Cedex, France
J. Chauville
Affiliation:
Observatoire de Paris - Meudon, 5 Place J. Janssen, 92195 - Meudon Principal Cedex, France

Extract

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HD 184279 (V1294 Aql) has presented in the past an emission spectrum on the first terms of the Balmer series, and shell absorptions on the hydrogen and neutral helium lines. Their variations have been reported by Merrill (1952), Merrill and Lowen (1953) and Svolopoulos (1975). Ballereau and Hubert-Delplace (1982) evidenced long-term V/R variations with an amplitude of ∼100 km s-1. Short-term photometric variations are irregular (Tempesti and Patriarca, 1976), while long-term variations are correlated with radial velocity (RV) of shell lines (Horn et al., 1982). Ballereau and Chauville (in preparation) extended the spectroscopic observations until 1984 and confirmed the pseudo-periodic variations, the last half-period ranging over 3.4 years (April 1, 1980-August 1, 1983).

Type
IIA. The Underlying Stars: Observations
Information
International Astronomical Union Colloquium , Volume 92: Physics of Be Stars , August 1987 , pp. 95 - 98
Copyright
Copyright © Cambridge University Press 1987

References

Ballereau, D. and Hubert-Delplace, A.M.: 1982, p. 171 in: Be Stars, IAU Symposium n° 98, eds Jaschek, M., Groth, H.-G., Reidel, Dordrecht.CrossRefGoogle Scholar
Horn, J., Hudec, R., Koubsky, P.: 1983 Inf. Bull. on Var. Stars n° 2304.Google Scholar
Merrill, P.W.: 1952, Astrophys. J. 115, 47.CrossRefGoogle Scholar
Merrill, P.W. and Lowen, A.L.: 1953, Astrophys. J. 118, 18.CrossRefGoogle Scholar
Svolopoulos, S.N.: 1975, Astron. Astrophys. 41, 199.Google Scholar
Tempesti, P. and Patriarca, R.: 1976, Inf. Bull, on Var. Stars n° 1164.Google Scholar
Underhill, A.: 1982 in: B Stars with and without Emission Lines, Underhill, A., Doazan, V., eds CNRS and NASA.Google Scholar