Evolution of Wide Star Pairs Owing to Irregular Forces |
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Authors: | A S Baranov |
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Institution: | (1) Main (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, Russia |
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Abstract: | The dynamic evolution of wide star pairs (separated by 104 AU for typical galactic conditions) under the influence of random interactions with background stars during transits is studied theoretically. Transits which form a roughly equilateral triangle at some time are considered. The combined effect of many transits can be separated into systematic heating of the pair plus random diffusion over the Kepler elements a and e. The corresponding Fokker-Planck equation is derived and its range of validity indicated. A steady state distribution over a and e is obtained. |
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Keywords: | stars wide pairs stars evolution irregular forces |
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