Radio/X-ray correlations and variability in the X-ray binary LS I +61°303
Artikel i vetenskaplig tidskrift, 2021

The high-mass X-ray binary LS I +61°303 exhibits variability in its radio and X-ray emissions, ranging from minute to hour time-scales. At such short time-scales, not much is known about the possible correlations between these two emissions from this source, which might offer hints to their origin. Here, we study the relationship between these emissions using simultaneous X-ray and radio monitoring.We present new radio observations using the Arcminute Microkelvin Imager Large Array telescope at two frequency bands, 13-15.5 and 15.5-18 GHz.We also describe new X-ray observations performed using the XMM-Newton telescope. These X-ray and radio observations overlapped for five hours. We find for the first time that the radio and X-ray emission are correlated up to 81 per cent with their few per cent variability correlated up to 40 per cent. We discuss possible physical scenarios that produces the observed correlations and variability in the radio and X-ray emission of LS I +61°303.

Stars: Jets -Radio continuum: Stars -X-rays: Binaries

Magnetic reconnection

X-rays: Individual: LS I +61°303

Radiation mechanisms: General


R. Sharma


M. Massi


M. Chernyakova

Dublin Institute for Advanced Studies

Dublin City University

D. Malyshev

Universität Tübingen

Y. C. Perrott

Department of Physics

Victoria University of Wellington

A. Kraus


Sergio A. Dzib


Frédéric Jaron

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium, Rymdgeodesi och geodynamik

T. Cantwell

University of Manchester

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 500 3 4166-4172


Astronomi, astrofysik och kosmologi

Atom- och molekylfysik och optik

Annan fysik



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