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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

Article Open Access

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.

Pour citer cet 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 : http://popups.ulg.ac.be/0037-9565/index.php?id=3209.

A propos de : 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

A propos de : Ignasi Ribas

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

A propos de : Carme Jordi

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

A propos de : Yevgeny Tsodikovich

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

A propos de : Tsevi Mazeh

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

A propos de : Edward F. Guinan

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

A propos de : Edward L. Fitzpatrick

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