The most massive eclipsing binary with apsidal motion

Details The most massive eclipsing binary with apsidal motion The most massive eclipsing binary with apsidal motion

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..729v&link_type=abstract

Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 729-732 (Proceedings of the 39th Liège Astrophysical Colloquium, hel

Astronomy and Astrophysics

Astrophysics

Scientific paper

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 M_&sun;). 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.

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