“School of Astronomy”

Back to Papers Home
Back to Papers of School of Astronomy

Paper   IPM / Astronomy / 16983
School of Astronomy
  Title:   Dynamical Friction and Tidal Interactions
1.  Mahmood . Roshan
2.  Bahram . Mashhoon
  Status:   Published
  Journal: Astrophysical Journal
  Vol.:  926
  Year:  2022
  Supported by:            ipm IPM
We discuss dynamical friction in an N-body system in the presence of tidal interactions caused by a distant external source. Using the distant tide approximation, we develop a perturbation scheme for the calculation of dynamical friction that takes tidal effects into account to linear order. In this initial analytic approach to the problem, we neglect the influence of tides on the distribution function of stars in the background stellar system. Our result for the dynamical friction force in the appropriate limit is in agreement with Chandrasekhar's formula in the absence of tides. We provide preliminary estimates for the tidal contributions to the dynamical friction force. The astrophysical implications of our results are briefly discussed.

Download TeX format
back to top
scroll left or right