Study of Wolf-Rayet stars using uGMRT

• Main Authors: Saha, Anindya, Tej, Anandmayee, del Palacio, Santiago, De Becker, Michaël, Benaglia, Paula, CH, Ishwara Chandra, Prajapati, Prachi
• Format: Journal Article
• Language: English
• Published: 24-06-2024
• Subjects: Physics - High Energy Astrophysical Phenomena
• DOI: 10.48550/arxiv.2406.16480

Bulletin de la Societe Royale des Sciences de Liege, 2024, Volume
93, No 2, 491-503 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 3$\sigma$ upper limits to the radio flux densities at 735 and 1260
MHz (123 and 66 $\mu$Jy for WR 114, and 111 and 96 $\mu$Jy for WR 142,
respectively). The plausible scenarios to interpret this non-detection are
presented.