Triple Eccentric Systems V0345 Lac, YY Sgr, and DR Vul

• Autorzy: Wolf M. , Zasche P. , Kučáková H. , Mašek M. , Hoňková K. , Juryšek J. , Paschke A. , Šmelcer L. , Zejda M.

Identyfikatory

DOI

10.32023/0001-5237/69.1.5

• Języki publikacji: EN

Abstrakty

EN

We present more results of our long-term observational project to analyze the variations of the orbital period for early-type eccentric eclipsing binaries. About sixty new precise mid-eclipse times were measured or derived for three eclipsing binaries, namely V0345 Lac, YY Sgr, and DR Vul. Based on current O-C diagrams, we found in all cases that beside the typical apsidal motion the times of minima show additional cyclical changes likely caused by a third body orbiting the eclipsing pair. The new light curve solution of V0345 Lac results in a moderate orbital eccentricity (e=0.26) of this binary. The periods of apsidal motion are 1580 yr, 295 yr, and 36 yr, respectively. The relativistic contributions to the total apsidal-motion rate are small for all three eccentric binaries - about 5-14%. The third-body orbital periods are relatively short: 24 yr, 19 yr and 66 yr, and the minimal masses of third bodies are: 2.0 M☉, 0.8 M☉, and 7.2 M☉, respectively.

Słowa kluczowe

EN

binaries: eclipsing; stars: individual: V0345 Lac; stars: individual: YY Sgr; stars: individual: DR Vul; stars: fundamental parameters

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2019
• Tom: Vol. 69, No. 1
• Strony: 63--78
• Opis fizyczny: Bibliogr. 82 poz., tab., wykr.

Twórcy

autor

Wolf M.

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

autor

Zasche P.

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

autor

Kučáková H.

• Astronomical Institute, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, CZ-180 00 Praha 8, Czech Republic
• Variable Star and Exoplanet Section, Czech Astronomical Society
• Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-746 01 Opava, Czech Republic
• Astronomical Institute, Academy of Sciences, Fričova 298, CZ-251 65 Ondřejov, 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

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

Paschke A.

• Variable Star and Exoplanet Section, Czech Astronomical Society
• Weierstrasse 30, CH-8630 Rueti, Switzerland

autor

Šmelcer L.

• Variable Star and Exoplanet Section, Czech Astronomical Society
• Observatory, Vsetínská 78, CZ-757 01 Valašské Meziříčí, Czech Republic

autor

Zejda M.

• Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republi

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)