The Strange Case of OGLE-SMC-ECL-0277

• Autorzy: Zasche P. , Wolf M. , Vraštil J. , Fatka P. , Galád A. , Hornoch K. , Janák Z. , Janík J. , Kortusová E. , Kurfürst P. , Kušnirák P. , Paunzen E. , Řezba L. , Votruba V. , Zejda M. , Zieliński P.

Identyfikatory

DOI

10.32023/0001-5237/67.3.3

• Języki publikacji: EN

Abstrakty

EN

The eclipsing system OGLE-SMC-ECL-0277 was found to exhibit unusual photometric variability. Beside its eclipsing nature additional variations with the periodicity of about 1500~d are also seen. Variations of the eclipse depth during the time span of the observational data (mainly taken from the OGLE survey, partly our new ones) are the most pronounced. The complex behavior of all these changes makes this system absolutely unique, no such variability was ever detected and studied in other systems before. Hence, are there some new phenomena, new physics or an unknown effects playing a role? We tried to understand these variations using four different hypotheses (\ie inclination change, spot evolution, and/or pulsation of one or both components) and comparing their results we discussed which of them is the most likely. Neither of the presented hypotheses is able to describe in detail the behavior of OGLE-SMC-ECL-0277. We also discuss a possibility that the variable can be a member of the so-called double periodic variables group.

Słowa kluczowe

EN

binaries: eclipsing; stars: fundamental parameters; stars: individual: OGLE-SMC-ECL-0277

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2017
• Tom: Vol. 67, No. 3
• Strony: 243--255
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Zasche P.

• Astronomical Institute, Charles University, Faculty of Mathematics and Physics, V Holešovičkách2, Praha 8, CZ-180 00, Czech Republic

autor

Wolf M.

• Astronomical Institute, Charles University, Faculty of Mathematics and Physics, V Holešovičkách2, Praha 8, CZ-180 00, Czech Republic

autor

Vraštil J.

• Astronomical Institute, Charles University, Faculty of Mathematics and Physics, V Holešovičkách2, Praha 8, CZ-180 00, Czech Republic

autor

Fatka P.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Galád A.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Hornoch K.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Janák Z.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Janík J.

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

autor

Kortusová E.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Kurfürst P.

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

autor

Kušnirák P.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Paunzen E.

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

autor

Řezba L.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Votruba V.

• Astronomical Institute, Academy of Sciences, Fričova 298, 251 65 Ondřejov, Czech Republic

autor

Zejda M.

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

autor

Zieliński P.

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

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Uwagi

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