On the evolutionary stage of the interacting binary AU Mon

Abstract

We present a study of the evolutionary stage of the interacting binary and Double Periodic Variable AU Monocerotis. A multi-parametric Chi2 minimization is made between the observed parameters and those predicted by the grid of non-conservative and conservative evolutionary models by Van Rensbergen et al., finding the model that best represents the current stellar and system parameters. According to this model, the system started with initial masses 4 M_sun and 3.6 M_sun and orbital period 3.0 days, 196 million years ago, and at present undergoes a Case-B mass-exchange episode. This evolutionary stage is consistent with the reported existence of a circumprimary accretion disk. However, the implied high mass transfer rate contrasts with the absence of significant orbital period change if the mass exchange is conservative. We show that this can occur if the system has recently entered in a non-conservative stage of mass transfer and the efficiency of mass and angular momentum loss satisfy certain conditions.

arXiv comment21 pages, 5 figures, 2 tables

References in corpus (11)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Spin-up and hot spots can drive mass out of a binary
• Double-periodic blue variables in the Magellanic Clouds
• CoRoT photometry and high-resolution spectroscopy of the interacting eclipsing binary AU Mon
• A cyclic bipolar wind in the interacting binary V393 Scorpii
• On the accretion disc and evolutionary stage of beta Lyrae
• The eclipsing LMC star OGLE05155332--6925581: a clue for Double Periodic Variables
• Accretion disk in the eclipsing binary AU Mon
• The evolution stage and massive disc of the interacting binary V393 Scorpii
• Physical parameters and evolutionary route for the LMC interacting binary OGLE 05155332-6925581
• Carbon deficiencies in the primaries of some classical Algols

Cited by in corpus (4)

• Doppler tomography of the Double Periodic Variable HD 170582 at low and high stage
• The dynamical mass and evolutionary status of the type-II Cepheid in the eclipsing binary system OGLE-LMC-T2CEP-211 with a double-ring disk
• Accretion disks in Algols: progenitors and evolution
• Structure in the Disk of epsilon Aurigae: Analysis of the ARCES and TripleSpec data obtained during the 2010 eclipse