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Dynamical stability of the quadruple systems HD 68255/6/7 and HD 76644

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Abstract

We analyze the dynamical stability of the hierarchical quadruple systems HD 68255/6/7 and HD 76644 via numerical integration of the equations of motion of the four-body problem, with a chainlike regularization of close stellar interactions. The observational errors were taken into account using Monte Carlo simulations, assuming that they possessed a Gaussian distribution. HD 68255/6/7 is probably stable, while HD 76644 is unstable with a probability exceeding 0.97 and with a disruption time of no more than 105 years. The influence of the observational errors and possible scenarios for the formation of unstable multiple stars are discussed.

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Authors and Affiliations

  1. Kazan State University, ul. Lenina 18, Kazan, 420008, Tatarstan, Russia

    R. Ya. Zhuchkov

  2. Sobolev Astronomical Institute, St.Petersburg State University, Universitetskiĭ pr.28, Petrodvorets, St.Petersburg, 198504, Russia

    V. V. Orlov & A. V. Rubinov

Authors
  1. R. Ya. Zhuchkov
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  2. V. V. Orlov
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  3. A. V. Rubinov
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Original Russian Text © R.Ya. Zhuchkov, V.V. Orlov, A.V. Rubinov, 2006, published in Astronomicheskiĭ Zhurnal, 2006, Vol. 83, No. 1, pp. 70–75.

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Zhuchkov, R.Y., Orlov, V.V. & Rubinov, A.V. Dynamical stability of the quadruple systems HD 68255/6/7 and HD 76644. Astron. Rep. 50, 62–67 (2006). https://doi.org/10.1134/S1063772906010070

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  • DOI: https://doi.org/10.1134/S1063772906010070

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