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Michaël De Becker, C. H. Ishwara-Chandra & Paula Benaglia

Prospects for radio observations of Particle-Accelerating Colliding-Wind Binaries with the Giant Metrewave Radio Telescope

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Mots-clés : étoiles massives, binaires, ondes radio, acceleration de particules, processus non-thermiques

Abstract

Synchrotron radiation identified in the radio domain for several tens of binary systems made of massive stars provides compelling evidence that a particle acceleration process is at work in these objects, hence their Particle-Accelerating Colliding-Wind Binaries (PACWB) status. Measurements of the synchrotron radio emission allow to investigate the non-thermal physics and to derive some of their properties. Non-thermal spectra are known to increase at lower frequencies, while thermal ones increase toward higher frequencies. In this context, it is worth investigating the expectations from longer wavelengths such as those measured by the Giant Metrewave Radio Telescope in India, in complementarity with the most abundant measurements at centimetric wavelengths obtained with other radio observatories such as the VLA or ATCA.

Keywords : massive stars, binaries, radio waves, acceleration of particles, non-thermal processes

To cite this article

Michaël De Becker, C. H. Ishwara-Chandra & Paula Benaglia, «Prospects for radio observations of Particle-Accelerating Colliding-Wind Binaries with the Giant Metrewave Radio Telescope», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 262 - 269 URL : https://popups.uliege.be:443/0037-9565/index.php?id=8953.

About: Michaël De Becker

Space sciences, Technologies and Astrophysics Research (STAR) Institute, University of Liège, Quartier Agora, 19c, Allée du 6 Août, B5c, B-4000 Sart Tilman, Belgium, Michael.DeBecker@uliege.be

About: C. H. Ishwara-Chandra

National Centre for Radio Astrophysics, TIFR, Post Bag No. 3, Ganeshkhind Post, 411007 Pune, India

About: Paula Benaglia

Instituto Argentino de Radioastronomía (CONICET;CICPBA), C.C. No 5, 1894, Villa Elisa, Argentina and Facultad de Ciencias Astronômicas y Geofísicas, UNLP, Paseo del Bosque s/n, 1900, La Plata, Argentina