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1 results

  • Kozai resonance model for Sagittarius A* stellar orbits

  • Ladislav Šubr, Vladimír Karas, Jaroslav Haas
  • Journal:
    Proceedings of the International Astronomical Union / Volume 2 / Issue S238 / August 2006
    Published online by Cambridge University Press:
    01 August 2006, pp. 201-206
    Print publication:
    August 2006
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  • We study a possibility of tidal disruptions of stars orbiting a supermassive black hole due to eccentricity oscillations driven by Kozai's mechanism. We apply the model to conditions relevant for the Galactic Centre where we consider two different sources of the perturbation to the central potential, which trigger the resonance mechanism. Firstly, it is a disc of young massive stars orbiting Sgr A* at r ≳ 0.08 pc, and, secondly, a molecular circumnuclear disc. Each of the two possibilities appears to be capable of exciting eccentricities to values sufficient for the tidal disruption of ∼100 stars from the nuclear stellar cluster on a time-scale of 0.1–10 Myrs. Tidally disrupted stars may cause periods of increased accretion activity of Sgr A*.