Tidal Interaction in High Mass X-ray Binaries and Symbiotic Stars

TL;DR

This paper investigates tidal interactions in high mass X-ray binaries and symbiotic stars, revealing synchronization patterns, eccentricity, and disk truncation effects through recent observational results.

Contribution

It provides new insights into tidal synchronization, eccentricity, and disk truncation in these binary systems based on recent data.

Findings

Symbiotic star giants with periods <1200 days are synchronized.

High mass X-ray binaries with periods <40 days are synchronized.

Be/X-ray binaries show non-synchronized behavior and disk truncation.

Abstract

This paper summarizes our recent results on tidal interaction in high mass X-ray binaries and symbiotic stars. We demonstrate that the giant in symbiotic stars with orbital periods <1200 d are co-rotating (synchronized). The symbiotics MWC 560 and CD-4314304 probably have high orbital eccentricity. The giants in symbiotic binaries rotate faster than the field giants, likely their rotation is accelerated by the tidal force of the white dwarf. The giant/supergiant High mass X-ray binaries with orbital periods <40 d are synchronized. However the Be/X-ray binaries are not synchronized. In the Be/X-ray binaries the circumstellar disks are denser and smaller than those in isolated Be stars, probably truncated by the orbiting neutron star.