Close stellar encounters with planetesimal discs: the dynamics of asymmetry in the β Pictoris system

@article{Larwood2001CloseSE,
  title={Close stellar encounters with planetesimal discs: the dynamics of asymmetry in the $\beta$ Pictoris system},
  author={John D. Larwood and Paul Kalas},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2001},
  volume={323},
  pages={402-416}
}
  • J. Larwood, P. Kalas
  • Published 14 November 2000
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We numerically investigate the dynamics of how a close stellar fly-by encounter of a symmetrical circumstellar planetesimal disc can give rise to the many kinds of asymmetries and substructures attributed to the edge-on dusty disc of β Pictoris. In addition we present new optical coronagraphic observations of the outer parts of the disc of β Pic, and report that the radial extent is significantly greater than was found in previous measurements. The north-easterly extension of the disc's mid… Expand
Mid-infrared images of β Pictoris and the possible role of planetesimal collisions in the central disk
TLDR
Thermal infrared images of the central disk imply that the brightness asymmetry results from the presence of a bright clump composed of particles that may differ in size from dust elsewhere in the disk, which is suggested to result from the collisional grinding of resonantly trapped planetesimals or the cataclysmic break-up of a planetesimal. Expand
Sculpting the outer Edgeworth–Kuiper belt: stellar encounter followed by planetary perturbations
Abstract We consider a close stellar fly-by as an explanation for the abrupt termination of the classical Edgeworth–Kuiper belt at around 50 AU from the Sun, and also for the high values of orbitalExpand
AN AZIMUTHAL ASYMMETRY IN THE LkHα 330 DISK
Theory predicts that giant planets and low mass stellar companions shape circumstellar disks by opening annular gaps in the gas and dust spatial distribution. For more than a decade it has beenExpand
Resolved debris disc emission around η Telescopii: a young solar system or ongoing planet formation?
Aims. 60% of the A star members of the 12 Myr oldβ Pictoris moving group (BPMG) show significant excess emissi on in the mid-infrared, several million years after the proto-plane tary disk is thoughtExpand
Structuring the HD 141569 A circumstellar dust disk. Impact of eccentric bound stellar companions
Scattered light images of the optically thin dust disk around the 5 Myr old star HD 141569 A have revealed its complex asymmetric structure. We show in this paper that the surface density inferredExpand
Stellar Encounters with the β Pictoris Planetesimal System
We use data from the Hipparcos catalog and the Barbier-Brossat & Figon catalog of stellar radial velocities to test the hypothesis that the b Pic planetesimal disk was disrupted by a close stellarExpand
Dust production from collisions in extrasolar planetary systems. The inner beta Pictoris disc
Dust particles observed in extrasolar planetary discs originate from undetectable km-sized bodies but this valuable information remains uninteresting if the theoretical link between grains andExpand
A debris disc under the influence of a wide planetary-mass companion: the system of HD 106906
The 13 Myr old star HD 106906 is orbited by a debris disk of at least 0:067 MMoon with an inner and outer radius of 20 AU and 120 AU, respectively, and by a planet at a distance of 650 AU. We useExpand
Flybys in protoplanetary discs: I. Gas and dust dynamics
We present 3D smoothed particle hydrodynamics simulations of protoplanetary discs undergoing a flyby by a stellar perturber on a parabolic orbit lying in a plane inclined relative to the discExpand
Mass transfer between debris discs during close stellar encounters
We study mass transfers between debris discs during stellar encounters. We carried out numerical simulations of close flybys of two stars, one of which has a disc of planetesimals represented by testExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 19 REFERENCES
P417 Evidence for early stellar encounters in the orbital distribution of Edgeworth-Kuiper Belt objects
We have investigated effects of early stellar encounters on a protoplanetary disk (planetesimal disk) and found that they can explain the high eccentricities and inclinations observed in the outerExpand
A planet on an inclined orbit as an explanation of the warp in the β Pictoris disc
We consider the deformation that has recently been observed in the inner part of the circumstellar disc around f3 Pictoris with the HST. Our recent ground-based, adaptive optics coronographicExpand
A Circumstellar Disk Around β Pictoris
A circumstellar disk has been observed optically around the fourth-magnitude star β Pictoris. First detected in the infrared by the Infrared Astronomy Satellite last year, the disk is seen to extendExpand
Rings in the Planetesimal Disk of beta Pictoris.
TLDR
A dynamical model is presented showing that a close stellar flyby with a quiescent disk of planetesimals can create such rings, along with previously unexplained disk asymmetries, which infer that beta Pic's planetesimal disk was highly disrupted by a stellar encounter in the last hundred thousand years. Expand
ENERGETICS OF STAR-DISC ENCOUNTERS IN THE NON-LINEAR REGIME
We investigate the response of a circumstellar accretion disc to the fly-by of a perturbing mass on a parabolic orbit. The energy and angular momentum transferred during the encounter are calculatedExpand
Accretion disc response to a stellar fly-by
We investigate the effect on an accretion disc around one star of a parabolic fly-by of another. In the prograde, coplanar encounter, the disc is tidally stripped down to about one half of theExpand
Spectral class distribution of circumstellar material in main-sequence stars
A detailed statistical evaluation of IRAS survey data of main-sequence stars within 25 pc indicates that the presence of cool shells around A, F, and G main-sequence stars is the rule, rather thanExpand
Exploiting the infrared: IRAS observations of the main sequence
We examined coadded IRAS survey data on samples of nearby main sequence stars in search of far-IR excesses similar to examples attributed to clouds of orbiting grains. Of 134 systems, 25 (19%) showExpand
Galactic Bridges and Tails
This paper argues that the bridges and tails seen in some multiple galaxies are just tidal relics of close encounters. These consequences of the brief but violent tidal forces are here studied in aExpand
Pre-Main-Sequence Binary Stars
The observational study of pre-main-sequence (PMS) binary stars is in many ways a very young field; most PMS binaries known today were discovered in the past decade. Nonetheless, T Tauri stars haveExpand
...
1
2
...