Formation of magnetized spatial structures in the Beta Lyrae system III. Reflection of magnetically controlled matter in circumbinary structures in helium lines, in particular arising from metastable levels

TL;DR

This study investigates how magnetic fields influence the formation and dynamics of gaseous structures in the Beta Lyrae binary system, focusing on helium spectral lines and magnetic field variations.

Contribution

It provides new observational evidence of magnetically controlled matter reflection in circumbinary structures, enhancing understanding of mass exchange and outflows in the system.

Findings

Magnetic field variations correlate with changes in circumstellar gas structures.

Helium lines from metastable levels reveal magnetically influenced gas dynamics.

Magnetic fields affect mass transfer and outflow processes in the binary system.

Abstract

Spatial gaseous structures in the Beta Lyrae system have been studied with the fact of change in the longitudinal component of the donor's magnetic field during the orbital period in mind. The investigation was based primarily on the study of the dynamics of the circumstellar structures surrounding the binary system as a whole. The special emphasis was placed on the study of complex helium lines, in particular those arising from metastable levels. A number of different observable facts from the ultraviolet to the red spectral region were analyzed. The configuration of the donor magnetic field is a factor that not only enhances mass transfer and influences the formation of spatial gas structures between stellar components but, to some extent, also affects the outflow of matter and the formation of external gas structures around this interacting binary system. Together with previous articles \citep{Skulskyy2020a, Skulskyy2020b}, the pieces of evidence of this work, confirming the reflection of magnetically controlled matter in circumbinary structures, define the basis for a coherent picture of the mass exchange between components and outflows of matter outwards