The Study of Triple Systems V949 Cen, V358 Pup and V1055 Sco

• Autorzy: Zasche P. , Hoňkovà K. , Juryšek J. , Mašek M.
• Języki publikacji: EN

Abstrakty

EN

The systems V949 Cen, V358 Pup, and V1055 Sco are triples comprised of an eclipsing binary orbiting with a distant visual component on a much longer orbit. The first detailed photometric analysis of these interesting systems was performed using also the archival data from Hipparcos, ASAS, SuperWASP, OMC, and Pi of the Sky surveys. The system V358 Pup was also analyzed using the archival ESO spectra and the radial velocities were derived. The analyses of their light curves revealed the physical properties of the eclipsing components, while the interferometric data for these systems obtained during the last century show that the binaries are also weakly gravitationally bounded with the third components on much longer orbits. The photometry was carried out with the robotic telescope FRAM (part of the Pierre Auger Cosmic Ray Observatory), located in Argentina. The BVRI light curves were analyzed with the PHOEBE program, yielding the basic physical parameters of the systems and their orbits. V949 Cen and V358 Pup were found to be detached systems, while V1055 Sco is probably a semi-detached one. V358 Pup shows a slow apsidal motion, while for V1055 Sco we detected some period variation probably due to the third body in the system, which cannot easily be attributed to the close visual companion. Therefore, we speculate that V1055 Sco can be a quadruple system. For V949 Cen a new orbit was computed, having the orbital period of about 855 yr.

Słowa kluczowe

EN

binaries: eclipsing; binaries: visual; stars: fundamental parameters; stars: individual: V949 Cen; stars: individual: V358 Pup; stars: individual: V1055 Sco

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2015
• Tom: Vol. 65, No. 2
• Strony: 151--168
• Opis fizyczny: Bibliogr. 41 poz., tab., wykr.

Twórcy

autor

Zasche P.

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

autor

Hoňkovà K.

• Variable Star and Exoplanet Section of Czech Astronomical Society

autor

Juryšek J.

• Astronomical Institute, Charles University Prague, Faculty of Mathematics and Physics, V Holešovičkàch 2, Praha 8, CZ-180 00, Czech Republic
• Institute of Physics, Czech Academy of Sciences, 182 21 Praha, Czech Republic

autor

Mašek M.

• Institute of Physics, Czech Academy of Sciences, 182 21 Praha, Czech Republic

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