OGLE-LMC-ECL-09937: The Most Massive Algol-Type Binary System with a Mass Measurement Accurate to 2%

• Autorzy: Skowron D. M. , Kourniotis M. , Prieto J. L. , Castro N. , Bonanos A. Z. , Pieńkowski D.

Identyfikatory

DOI

10.32023/0001-5237/67.4.3

• Języki publikacji: EN

Abstrakty

EN

This paper presents a detailed analysis of the light and radial velocity curves of the semi-detached eclipsing binary system OGLE-LMC-ECL-09937. The system is composed of a hot, massive and luminous primary star of a late-O spectral type, and a more evolved, but less massive and luminous secondary, implying an Algol-type system that underwent a mass transfer episode. We derive masses of 21.04±0.34 M☉ and 7.61±0.09 M☉ and radii of 9.93±0.06 R☉ and 9.18±0.04 R☉, for the primary and the secondary component, respectively, which make it the most massive known Algol-type system with masses and radii of the components measured with <2% accuracy. Consequently, the parameters of OGLE-LMC-ECL-09937 provide an important contribution to the sparsely populated high-mass end of the stellar mass distribution, and an interesting object for stellar evolution studies, being a possible progenitor of a binary system composed of two neutron stars.

Słowa kluczowe

EN

binaries: eclipsing; stars: early-type; stars: fundamental parameters; stars: massive

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2017
• Tom: Vol. 67, No. 4
• Strony: 329--344
• Opis fizyczny: Bibliogr. 42 poz., rys., tab.

Twórcy

autor

Skowron D. M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Kourniotis M.

• Astronomický ústav AVČR, Ondřejov, 25165, Czech Republic
• IAASARS, National Observatory of Athens, Penteli 15236, Greece

autor

Prieto J. L.

• Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército 441, Santiago, Chile
• Millennium Institute of Astrophysics, Santiago, Chile

autor

Castro N.

• Department of Astronomy, University of Michigan, 1805 S.University, Ann Arbor, MI 48109, USA

autor

Bonanos A. Z.

• IAASARS, National Observatory of Athens, Penteli 15236, Greece

autor

Pieńkowski D.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

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Uwagi

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