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2012MNRAS.421.3431M - Mon. Not. R. Astron. Soc., 421, 3431-3442 (2012/April-3)
Interstellar medium perturbations on transport-dominated debris discs in binary star systems.
MARZARI F.
Abstract (from CDS):
Within these values of aB, the time-scale of the binary secular perturbations is much shorter than the period of the ISM-induced orbital variations, and the disc shape and density distribution are dominated by the companion gravity. It appears slightly eccentric and, if the binary is coplanar with the disc, only a limited warping due to the ISM perturbations is observed. In this scenario, the strong ISM perturbations, which may significantly affect debris discs around single stars embedded in strong ISM winds, are almost completely silenced.
For larger semimajor axes, the scenario is reversed with the ISM perturbations ruling the dynamics of the dust. The disc develops a large clump oriented at 90° with respect to the direction of the ISM flux and it appears highly warped in space. Since the period of the two perturbations can be analytically estimated, it is possible to deduce by easy computations when a given system is governed either by the binary gravity or by the ISM perturbations.
Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS
Journal keyword(s): celestial mechanics - - interplanetary medium - - binaries: general - - circumstellar matter - - ISM: general
Simbad objects: 2
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