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Anindya Saha, Anandmayee Tej, Santiago del Palacio, Michaël De Becker, Paula Benaglia, C.H. Ishwara-Chandra & Prachi Prajapati

Study of Wolf-Rayet Stars Using uGMRT

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
DOI: 10.25518/0037-9565.11764
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Abstract

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.

Keywords : stars: Wolf-Rayet, stars: WR 114, stars: WR 142, radio continuum: ISM, radiation mechanisms: thermal, radiation mechanisms: non-thermal

To cite this article

Anindya Saha, Anandmayee Tej, Santiago del Palacio, Michaël De Becker, Paula Benaglia, C.H. Ishwara-Chandra & Prachi Prajapati, «Study of Wolf-Rayet Stars Using uGMRT», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 491-503 URL : https://popups.uliege.be/0037-9565/index.php?id=11764.

About: Anindya Saha

Indian Institute of Space Science and Technology, Thiruvananthapuram 695 547, Kerala, India. Corresponding author: anindya.s1130@gmail.com

About: Anandmayee Tej

Indian Institute of Space Science and Technology, Thiruvananthapuram 695 547, Kerala, India

About: Santiago del Palacio

Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden

About: Michaël De Becker

Space sciences, Technologies and Astrophysics Research (STAR) Institute, University of Liège, Belgium

About: Paula Benaglia

Instituto Argentino de Radioastronomía, CONICET-CICPBA-UNLP, Argentina

About: C.H. Ishwara-Chandra

National Centre for Radio Astrophysics, Pune 411 007, Maharashtra, India

About: Prachi Prajapati

Physical Research Laboratory (PRL), Navrangpura, Ahmedabad 380 009, Gujarat, India