Evidence for periodic accretion-ejection in LSI+61303
Abstract
The stellar binary system LS I +61303, composed of a compact object in an eccentric orbit around a B0 Ve star, emits from radio up to gamma-ray energies. The orbital modulation of radio spectral index, X-ray, and GeV gamma-ray data suggests the presence of two peaks. This two-peaked profile is in line with the accretion theory predicting two accretion-ejection events for LS I +61303 along the 26.5 d orbit. However, the existing multiwavelength data are not simultaneous. In this paper, we report the results of a campaign covering radio, X-ray, and gamma-ray observations of the system along one single orbit. Our results confirm the two predicted events along the orbit and in addition show that the positions of radio and gamma-ray peaks are coincident with X-ray dips as expected for radio and gamma-ray emitting ejections depleting the X-ray emitting accretion flow. We discuss future observing strategies for a systematic study of the accretion-ejection physical processes in LS I +61303.
Keywords
Cite
@article{arxiv.2010.08598,
title = {Evidence for periodic accretion-ejection in LSI+61303},
author = {M. Massi and M. Chernyakova and A. Kraus and D. Malyshev and F. Jaron and S. Kiehlmann and S. A. Dzib and R. Sharma and S. Migliari and A. C. S. Readhead},
journal= {arXiv preprint arXiv:2010.08598},
year = {2020}
}
Comments
10 pages, 7 figures, MNRAS