Synchrotron Radio Emission as a Proxy to Identify Long Period Massive Binaries
arXiv:2406.14199 · doi:10.25518/0037-9565.11788
Abstract
The multiplicity of massive stars is known to be significantly high. Even though the majority of massive stars are located in binary systems, the census of binaries is biased toward shorter periods as longer period systems are more difficult to identify. Alternatively, the search for binary systems with longer periods may proceed differently. As massive binary systems are typically colliding-wind systems, hints for processes occurring in the colliding-wind region could be used as a valuable proxy to identify likely binary systems, and then organize dedicated spectroscopic or interferometric campaigns on a short list of pre-selected targets. In this context, any hint for synchrotron radio emission is seen as a promising indicator of long period binaries, as short period systems undergo severe free-free absorption of the synchrotron emission by the stellar wind material. Usual techniques to identify synchrotron radio emitters constitute thus valid tools to explore that poorly investigated part of the massive binary parameter space. In addition, the identification of a synchrotron emission component in a short period binary can be used as an indicator of the presence of a third companion on a still unrevealed wider orbit in a triple system.
arXiv comment8 pages, 1 figure, Published in the Proceedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, held in Bhimtal, India
References in corpus (15)
- GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
- Binary interaction dominates the evolution of massive stars
- Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection
- High resolution radio observations of the colliding-wind binary WR140
- Catalogue of particle-accelerating colliding-wind binaries
- Non-thermal emission processes in massive binaries
- Resolved astrometric orbits of ten O-type binaries
- Three-dimensional orbits of the triple-O stellar system HD 150136
- Non-thermal radio emission from O-type stars. II. HD 167971
- An investigation into the fraction of particle accelerators among colliding-wind binaries. Towards an extension of the catalogue
- A radio-map of the colliding winds in the very massive binary system HD 93129A
- The long period eccentric orbit of the particle accelerator HD167971 revealed by long baseline interferometry
- AU-scale radio imaging of the wind collision region in the brightest and most luminous non-thermal colliding wind binary Apep
- Multiplicity of northern bright O-type stars with optical long baseline interferometry
- Investigating the Role of Pre-supernova Massive Stars in the Acceleration of Galactic Cosmic Rays