Analysis of the photoelectric light curve and the orbital period variations of the binary system UU Andromedae

Manzoori, Davood; Abbasvand, Salar; Najafinezhad, F.

doi:10.1002/asna.201412196

Cited by 4 publications

(10 citation statements)

References 14 publications

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“…Up to the present, O-C based orbital period analysis studies have only been presented by Qian (2001) and Manzoori et al (2015). Qian (2001) made a period analysis of UU And using 150 visual and photographic primary minimum times.…”

Section: Introductionmentioning

confidence: 99%

“…Secular mass and angular momentum loss were suggested as possible mechanisms of the orbital period decrease. Manzoori et al (2015) re-examined the O-C changes of UU And with 183 minimum times observed from 1911 to 2008. Out of 183, 36 were photoelectric (Pe) minimum times observed under the WASP survey (Pollacco et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Out of 183, 36 were photoelectric (Pe) minimum times observed under the WASP survey (Pollacco et al, 2006). Manzoori et al (2015) proposed secular orbital period increase at rate of 4.63 × 10 −7 days /yr. Secular mass transfer between components was attributed by Manzoori et al (2015).…”

Section: Introductionmentioning

confidence: 99%

“…Manzoori et al (2015) proposed secular orbital period increase at rate of 4.63 × 10 −7 days /yr. Secular mass transfer between components was attributed by Manzoori et al (2015). Manzoori et al (2015) also detected a cyclic O-C change over a period of 18 yr, suggesting that magnetic activity in the system was the most plausible mechanism responsible for the cyclic O-C change.…”

Section: Introductionmentioning

confidence: 99%

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Algol-türü Örten Çift UU And'ın O-C Analizi

OZTURK¹

2020

Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Using all available minimum times of Algol-type eclipsing binary UU And, Observed(O)-Calculated (C) based orbital period analysis of UU And is presented in this study. O-C diagram of UU And is represented by cyclic variation superimposed on an upward parabolic variation. The upward parabolic variation was modelled by assuming non-conservative mass transfer from the less massive to the more massive component to explain the secular period increase of the system. The rate of fractional mass transfer () was calculated to be 0.947. Cyclic O-C variation at period of 14 years was detected in the diagram. Light travel time effect (LTTE) caused by additional body in the system was assumed in order to explain the cyclic O-C variation. Using the mass function obtained from O-C analysis, the possible mass of the third component was found to be in the order of solar mass. Such a massive additional body show itself distinctly in the light curve of UU And. On the contrary, no light contribution from an additional body has been detected in the literature so far. Therefore, we conclude that precise high resolution spectroscopic observations are required in order to clarify the existence of a third body and/or magnetic cycle, which may also give rise to cyclic O-C variation in the binary star system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Algol-türü Örten Çift UU And'ın O-C Analizi

OZTURK¹

2020

Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…An O-C diagram of UU And in the time interval 1973-1986 was published in [27], who pointed out two distinct period jumps, the first was roughly in 1976 and the second in 1983. The study of period variations of the system was made in [35], a period decrease of the order of dP/dt = 4.76 • 10 −7 d/yr was reported in [26].…”

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confidence: 99%

O-C diagrams of Algol-type binary stars

Кудак¹,

Parimucha²

2016

Adv.Astron.Spa.Physics

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Algol-türü Örten Çift UU And'ın O-C Analizi

Öztürk

2020

Journal of Advanced Research in Natural and Applied Sciences

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Using all available minimum times of Algol-type eclipsing binary UU And, Observed(O) - Calculated (C) based orbital period analysis of UU And is presented in this study. O-C diagram of UU And is represented by cyclic variation superimposed on an upward parabolic variation. The upward parabolic variation was modelled by assuming non-conservative mass transfer from the less massive to the more massive component to explain the secular period increase of the system. The rate of fractional mass transfer (β) was calculated to be 0.947. Cyclic O-C variation at period of 14 years was detected in the diagram. Light travel time effect (LTTE) caused by additional body in the system was assumed in order to explain the cyclic O-C variation. Using the mass function obtained from O-C analysis, the possible mass of the third component was found to be in the order of solar mass. Such a massive additional body show itself distinctly in the light curve of UU And. On the contrary, no light contribution from an additional body has been detected in the literature so far. Therefore, we conclude that precise high resolution spectroscopic observations are required in order to clarify the existence of a third body and/or magnetic cycle, which may also give rise to cyclic O-C variation in the binary star system.

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Analysis of the photoelectric light curve and the orbital period variations of the binary system UU Andromedae

Cited by 4 publications

References 14 publications

Algol-türü Örten Çift UU And'ın O-C Analizi

Algol-türü Örten Çift UU And'ın O-C Analizi

O-C diagrams of Algol-type binary stars

Algol-türü Örten Çift UU And'ın O-C Analizi

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