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Capture of 20 km/s approach velocity interstellar comets by three-body interactions in the planetary system

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Abstract

Interstellar comets with velocities at infinity of 20 km s-1 can be captured by three-body interactions within the planetary system. A semianalytic method is presented indicating that Jupiter is the only planet capable of scattering these comets into bound orbits. The time-averaged cross section for this process seems to be roughly five times the area of Jupiter. With an observational upper limit on interstellar comets of ≡1013pc-3, the resulting capture rate amounts to only one comet every 60 Myr.


Publication:

The Astronomical Journal

Pub Date:
July 1986
DOI:

10.1086/114148

Bibcode:
1986AJ.....92..171T
Keywords:
  • Comets;
  • Gravitational Effects;
  • Interstellar Space;
  • Jupiter (Planet);
  • Solar System;
  • Three Body Problem;
  • Astronomical Coordinates;
  • Capture Effect;
  • Cross Sections;
  • Orbit Perturbation;
  • Solar Orbits;
  • Astrophysics