The Be/X-ray Binary LSI+61303 in terms of Ejector-Propeller Model

TL;DR

This paper evaluates the ejector-propeller model for the Be/X-ray binary LSI+61303, explaining its X-ray and radio variability through orbital dynamics and regime transitions, aligning well with observed data.

Contribution

It demonstrates that the ejector-propeller model can account for the observed X-ray and radio variability in LSI+61303, including timing delays and outburst origins.

Findings

X-ray maximum occurs at periastron passage.

Radio outbursts result from regime transitions.

Radio outburst delays match orbital period cycles.

Abstract

We tested the ejector-propeller model of the Be/X-ray binary LSI+61303 (V 615 Cas, GT 0236+620) by using the parameters predicted by the model in the calculations of the X-ray and radio variability. The results are: (1) in terms of the Ejector-Propeller model, the X-ray maximum is due to the periastron passage; (2) the radio outburst can be really a result of the transition from the propeller to ejector regimes; (3) the radio outburst will delay with respect to the X-ray maximum every orbital period. The proposed scenario seems to be in good agreement with the observations.