Volume 396, Number 3, December IV 2002
|Page(s)||937 - 948|
|Section||Interstellar and circumstellar matter|
|Published online||05 December 2002|
On the role of duplicity in the Be phenomenon
I. General considerations and the first attempt at a 3-D gas-dynamical modelling of gas outflow from hot and rapidly rotating OB stars in binaries
Astronomical Institute of the Charles University, V Holešovičkách 2, 180 00 Praha 8 - Troja, Bohemia, Czech Republic
2 Astronomical Institute of the Academy of Sciences of the Czech Republic, 251 65 Ondřejov, Bohemia, Czech Republic
3 Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, Moscow 109017, Russia e-mail: email@example.com; firstname.lastname@example.org
4 Keldysh's Institute of Applied Mathematics, Miusskaya Square 4, Moscow 125047, Russia e-mail: email@example.com
Corresponding author: P. Harmanec, firstname.lastname@example.org
Accepted: 14 October 2002
This paper begins a new series of studies devoted to a critical re-examination of the role of duplicity for the Be phenomenon and for the variability patterns observed for many Be stars. Based on both dynamical and energy considerations and a numerical gas-dynamical modelling, a new hypothesis of the formation of Be envelopes in binaries, via an outflow from a rapidly rotating B star in a detached binary, is outlined. It is shown that such an outflow is facilitated by the presence of a companion to the B star and leads to the formation of an envelope but not to any significant mass exchange between the binary components.
Key words: stars: emission-line, Be / stars: binaries: close / stars: binaries: spectroscopic / stars: fundamental parameters
© ESO, 2002
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