Issue |
A&A
Volume 366, Number 3, February II 2001
|
|
---|---|---|
Page(s) | 840 - 857 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20000245 | |
Published online | 15 February 2001 |
Tidal evolution of eccentric orbits in massive binary systems
II. Coupled resonance locking for two rotating main sequence stars
Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands
Corresponding author: M. G. Witte, marnix@astro.uva.nl
Received:
8
September
2000
Accepted:
13
November
2000
We extend our study of the tidal evolution of elliptic binary systems
to the case of a system consisting of two
uniformly rotating main sequence stars.
Previous work showed that in a system consisting of a
compact object in orbit about a
main sequence star
stellar oscillation modes were prone to be excited nearly resonantly for prolonged
periods of time. This resonance locking was shown to constitute an effective
mechanism for orbital decay in moderately eccentric orbits. In this work we investigate
in what ways the locking mechanism is altered if also the companion is tidally
perturbed, also inducing orbital changes and potentially also being locked in resonance.
We show that simultaneous locking can intensify the tidal excitations, and that
resonance locking is a common phenomenon during the tidal evolution of eccentric double
main sequence binary systems which speeds up the secular evolution significantly.
Key words: stars: rotation / stars: oscillations / stars: binaries: close / hydrodynamics
© ESO, 2001
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