Speaker
Description
Fast rotating massive pulsators in eclipsing binaries are ideal candidates for studying interior mixing and angular momentum transport in massive stars. Different mixing processes such as convective overshooting, which transports only matter, and convective penetration, which transports both matter and heat, occur at the boundary between the convective and the radiative layers in a massive star. These processes increase the core mass of the star and are also strongly affected by fast internal rotation. Fast internal rotation also diminishes the effect of tidal forces, often resulting in non-synchronous rotation, and causes rotational mode splitting, complicating mode identification. This study investigates the pulsational characteristics and their impact on the structure and evolution of fast-rotating β Cep pulsators in eclipsing binaries. Here, we analyse an ensemble of 73 such systems, identify rotationally split modes where possible, and statistically derive the dependence of pulsational properties on stellar and binary dynamical parameters. Interior properties of the systems were also derived using pre-computed grids of stellar structure models using MESA and associated pulsation frequencies using GYRE. The rotational parameters are also derived for 12 systems exhibiting clear rotational mode spliting. The inferred properties provide new insights into the structure and evolutionary pathways of β Cep stars in binary systems.
| Stream | Science or Engineering |
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