The Triple Eccentric Systems V974 Cyg, RU Mon, and V456 Oph

• Autorzy: Wolf M. , Zasche P. , Kučáková H. , Hoňková K. , Juryšek J. , Mašek M. , Uhlař R. , Urbaník M.

Identyfikatory

DOI

10.32023/0001-5237/67.3.4

• Języki publikacji: EN

Abstrakty

EN

We present results of a long-term program for timing the eclipses of eccentric eclipsing binaries. About 40 new precise mid-eclipse times were measured for the eclipsing binary V974 Cyg, RU Mon and V456 Oph. Based on current O-C diagrams, we found in all cases that times of minima besides the typical apsidal motion show additional cyclical changes caused very probably by the third bodies orbiting the eclipsing pair. The periods of apsidal motion are 1470 yr, 361 yr and 22.6 yr, respectively. The period of V456 Oph this is one of the shortest known apsidal-motion periods. The relativistic contributions to the total apsidal-motion rate are significant for V974 Cyg (about 30%) and negligible for RU Mon and V456 Oph (1-2.5%). The third-body orbital periods are relatively short: 30.6 yr, 59.8 yr and 7.4 yr, and their minimal masses are 0.40 M☉, 1.6 M☉, and 0.27 M☉, respectively.

Słowa kluczowe

EN

binaries: eclipsing; stars: individual: V974 Cyg; stars: individual: RU Mon; stars: individual: V456 Oph; stars: fundamental parameters

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2017
• Tom: Vol. 67, No. 3
• Strony: 257--271
• Opis fizyczny: Bibliogr. 71 poz. rys., tab.

Twórcy

autor

Wolf M.

• Astronomical Institute, Faculty of Mathematics and Physics, Charles University, CZ-180 00 Praha 8, V Holešovičkách 2, Czech Republic

autor

Zasche P.

• Astronomical Institute, Faculty of Mathematics and Physics, Charles University, CZ-180 00 Praha 8, V Holešovičkách 2, Czech Republic

autor

Kučáková H.

• Astronomical Institute, Faculty of Mathematics and Physics, Charles University, CZ-180 00 Praha 8, V Holešovičkách 2, Czech Republic
• Variable Star and Exoplanet Section, Czech Astronomical Society

autor

Hoňková K.

• Variable Star and Exoplanet Section, Czech Astronomical Society

autor

Juryšek J.

• Variable Star and Exoplanet Section, Czech Astronomical Society
• Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, CZ-182 21 Praha 8, Czech Republic

autor

Mašek M.

• Variable Star and Exoplanet Section, Czech Astronomical Society
• Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, CZ-182 21 Praha 8, Czech Republic

autor

Uhlař R.

• Variable Star and Exoplanet Section, Czech Astronomical Society
• Private Observatory, Pohoří 71, CZ-254 01 Jílove u Prahy, Czech Republic

autor

Urbaník M.

• Kysuce Observatory, Dolinský potok 1278, SK-024 01 Kysucké Nové Mesto, Slovakia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).