ISSN 0037-9565
Volume 80 - Année 2011

Type de document : Article

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

The most massive eclipsing binary with apsidal motion

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.

Documents annexes

Il y a 1 document annexé à cet article.

Pour citer cet article :

Francesc Vilardell, Ignasi Ribas, Carme Jordi, Yevgeny Tsodikovich, Tsevi Mazeh, Edward F. Guinan et Edward L. Fitzpatrick. «The most massive eclipsing binary with apsidal motion». Bulletin de la Société Royale des Sciences de Liège, Volume 80 - Année 2011 : 729 - 732
http://popups.ulg.ac.be/SRSL/document.php?id=3209

Quelques mots à 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

Quelques mots à propos de :  Ignasi  Ribas

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

Quelques mots à propos de :  Carme  Jordi

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

Quelques mots à propos de :  Yevgeny  Tsodikovich

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

Quelques mots à propos de :  Tsevi  Mazeh

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

Quelques mots à propos de :  Edward F.  Guinan

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

Quelques mots à propos de :  Edward L.  Fitzpatrick

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

Article précédent
Précédent

  Article suivant
Suivant

Le portail PoPuPS est une réalisation du Réseau des Bibliothèques de l'Université de Liège