{
  "annotation_id": "56dcf971-51d4-4bdd-94c2-e998ea571f19",
  "date_created": "2026-03-02T18:01:07.830000Z",
  "date_modified": "2026-03-02T18:01:07.830000Z",
  "file_hash": "301c16f11aa45cd1bb1d41df3364e0b8e110a89a3de25e58100154559809cddf",
  "private": false,
  "record": {
    "abstract": "An introductory exposition of Chandrasekhar\u0027s gravitational dynamical\nfriction, appropriate for an undergraduate class in mec hanics, is presented.\nThis friction results when a massive particle moving through a ``sea\u0027\u0027 of much\nlighter star particles experiences a retarding force du to an exchange of\nenergy and momentum. General features of dynamical friction are presented, both\nin an elementary and in a more elaborate way using hyperbolic two-body\ninteractions. The orbital decay of a massive particle in an homogeneous\ngravitational system is solved analytically, that leads to an underdamped\nharmonic oscillator type of motion. A numerical integration of the equation of\nmotion in a more realistic c ase is done. These results are compared to those\nof an N-body computer simulation. Several problems and projects are suggested\nto students for further st udy.",
    "arxiv_id": "physics/0603066",
    "authors": [
      "Hector Aceves",
      "Maria Colosimo"
    ],
    "categories": [
      "physics.class-ph",
      "physics.comp-ph"
    ],
    "title": "Dynamical Friction in Stellar Systems: an introduction",
    "url": "https://arxiv.org/abs/physics/0603066"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fa3f4b85-47e1-41f1-acc1-08575c24ad30",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}