Non-linear effects at tidal capture of stars by a massive black hole -I. Incompressible affine model

A. G. Kosovichev, I. D. Novikov

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Non-linear effects of the tidal interaction of a star with a massive black hole are discussed on the basis of an ellipsoidal 'affine' stellar model proposed by Carter & Luminet. The effects are considered for an incompressible stellar model. We compute the amount of energy deposited into the star from the orbital motion by tidal forces and determine an effective Roche limit of tidal disruption for a parabolic orbit. A comparison between the non-linear affine model and a linear theory of small perturbations is made, and the limits of their applicability are found. The dynamics of the tidal interactions at subsequent pericentre passages after the tidal capture are considered, and it is shown that the non-linear effects significantly reinforce the absorption of the orbital energy by the star, and result in tidal disruptions far beyond the Roche limit.

Original languageEnglish (US)
Pages (from-to)715-724
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume258
Issue number4
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Binaries: close
  • Black hole physics
  • Galaxies: nuclei
  • Instabilities
  • Stars: oscillations

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