A Period Study of the Eclipsing Binary U Sagittae - UTU Tutkimustietojärjestelmä

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A Period Study of the Eclipsing Binary U Sagittae

Tekijät: Manzoori, D.; Gozaliasl, G.

Kustantaja: The American Astronomical Society

Julkaisuvuosi: 2007

Lehti:: The Astronomical Journal

Vuosikerta: 133

Numero: 4

Aloitussivu: 1302

Lopetussivu: 1306

Sivujen määrä: 5

ISSN: 0004-6256

DOI: https://doi.org/10.1086/511064

Verkko-osoite: https://iopscience.iop.org/article/10.1086/511064/meta

Rinnakkaistallenteen osoite: https://iopscience.iop.org/article/10.1086/511064/meta

Tiivistelmä

The O - C curve of the eclipsing binary U Sagittae was analyzed using the Kalimeris method. A period decrease was indicated by this curve. The observed period P(E) and its rate of change dP/dE as a function of time were calculated. To reveal any cyclic period variations, the P(E) function was subjected to Fourier analysis. A cyclic period change of 9.5 yr duration with amplitude ΔP = 6.385 × 10^-6 days was obtained. The mass transfer rate for the system was calculated, and these results have been used to discuss period variability.