Massive stars; Particle acceleration; Radio astrophysics; Wolf-Rayet stars
Abstract :
[en] 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, WR114 and WR142, 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 WR114, and 111 and 96 $\mu$Jy for WR142, respectively). The plausible scenarios to interpret this non-detection are presented.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège [BE]
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Saha, Anindya
Tej, A.
del Palacio, S.
De Becker, Michaël ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Sciences spatiales ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR) ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Multi-wavelength Extragalactic and Galactic Astrophysics (MEGA)
Benaglia, P.
Ishwara-Chandra, C.H.
Prajapati, P.
Language :
English
Title :
Study of Wolf-Rayet stars using uGMRT
Publication date :
In press
Event name :
Third BINA workshop: Scientific potential of the Indo-Belgian cooperation
Event place :
Bhimtal, India
Event date :
22-24 March 2023
Audience :
International
Journal title :
Bulletin de la Société Royale des Sciences de Liège
ISSN :
0037-9565
eISSN :
1783-5720
Publisher :
Société Royale des Sciences de Liege, Liège, Belgium
