Study of Wolf-Rayet Stars Using uGMRT

Artikel i vetenskaplig tidskrift, 2024

In recent years, systems involving massive stars with large wind kinetic power have been considered as promising sites for investigating relativistic particle acceleration in low radio frequencies. With this aim, we observed two Wolf-Rayet systems, WR 114 and WR 142, using upgraded Giant Meterwave Radio Telescope observations in Band 4 (550–950 MHz) and Band 5 (1050–1450 MHz). None of the targets was detected at these frequencies. Based on the non-detection, we report 3σ upper limits to the radio flux densities at 735 and 1260 MHz (123 and 66 µJy for WR 114, and 111 and 96 µJy for WR 142, respectively). Plausible scenarios to interpret this non-detection are presented.