Riassunto
Si sono raccolti i minimi osservati di RT Persei fino al 1971 e, dalla soluzione per minimi quadrati, si sono trovati dei termini periodici ed un termine quadratico. Si sono interpretati i termini periodici come dovuti ad effetto di terzo corpo, ma l'ipotesi non sembra ben fondata e potrebbe essere esclusa del tutto mediante una serie di nuovi spettri. L'interpretazione più fondata delle variazioni di periodo sembra essere una probabile instabilità dinamica del sistema.
Abstract
The observed minima of RT Persei up to 1971 are collected and treated by the method of least squares to establish periodic terms with a fundamental period of 40y0 and, furthermore, a quadratic term. It is shown that the periodic terms might be explained by the presence of a third body, but this hypothesis seems unlikely, and could be definitively ruled out by new spectroscopic observations. A dynamical instability of the system may constitute a more likely explanation of the observed period changes.
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Mancuso, S., Milano, L. On the period variations of RT Persei. Astrophys Space Sci 32, 385–401 (1975). https://doi.org/10.1007/BF00643152
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DOI: https://doi.org/10.1007/BF00643152