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

Michael De Becker, C. H. Ishwara-Chandra, Paula Benaglia.

Serie: Trabajos publicados del IAR ; no. 1527

Resumen: Synchrotron radiation identified in the radio domain for several tens ofbinary systems made of massive stars provides compelling evidence that aparticle acceleration process is at work in these objects, hence theirParticle-Accelerating Colliding-Wind Binaries (PACWB) status.Measurements of the synchrotron radio emission allow to investigate thenon-thermal physics and to derive some of their properties. Non-thermalspectra are known to increase at lower frequencies, while thermal onesincrease toward higher frequencies. In this context, it is worthinvestigating the expectations from longer wavelengths such as thosemeasured by the Giant Metrewave Radio Telescope in India, incomplementarity with the most abundant measurements at centimetricwavelengths obtained with other radio observatories such as the VLA orATCA