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Francesc Vilardell, Ignasi Ribas, Carme Jordi, Yevgeny Tsodikovich, Tsevi Mazeh, Edward F. Guinan & Edward L. Fitzpatrick

The most massive eclipsing binary with apsidal motion

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Abstract

The fundamental properties of a detached and eccentric eclipsing binary (EB) with apsidal motion are presented (M31V J00442326+4127082). The system is composed by two very massive stars (with masses over 40 Mo). An additional third light is observed that could be the responsible of the discrepancy between the observed apsidal motion (of 2.4 ± 1.0 deg yr−1) and the value predicted by stellar interior models (5.4 ± 0.8 deg yr−1). However, the observed apsidal motion could be more easily explained if the stellar cores were larger than currently predicted. Therefore, additional observations of the EB presented here could be used to test the internal structure of very massive stars.

To cite this article

Francesc Vilardell, Ignasi Ribas, Carme Jordi, Yevgeny Tsodikovich, Tsevi Mazeh, Edward F. Guinan & Edward L. Fitzpatrick, «The most massive eclipsing binary with apsidal motion», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 729 - 732 URL : https://popups.uliege.be/0037-9565/index.php?id=3209.

About: Francesc Vilardell

Departament de Física, Enginyeria de Sistemes i Teoria del Senyal, Universitat d’Alacant, Alacant, Spain, and Departament d’Astronomia i Meteorologia (ICC-IEEC), Universitat de Barcelona, Barcelona, Spain

About: Ignasi Ribas

Institut de Ciències de l’Espai (CSIC-IEEC), Campus UAB, Bellaterra, Spain

About: Carme Jordi

Departament d’Astronomia i Meteorologia (ICC-IEEC), Universitat de Barcelona, Barcelona, Spain

About: Yevgeny Tsodikovich

School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel

About: Tsevi Mazeh

School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel

About: Edward F. Guinan

Department of Astronomy and Astrophysics, Villanova University, Villanova, USA

About: Edward L. Fitzpatrick

Department of Astronomy and Astrophysics, Villanova University, Villanova, USA