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Gustavo E. Romero, Paula Benaglia, Cintia S. Peri, Josep Martí & Anabella T. Araudo

Non-thermal radiation from a runaway massive star

Article Open Access

Abstract

We present a study of the radio emission from a massive runaway star. The star forms a bow shock that is clearly observed in the infrared. We have performed VLA observations under the assumption that the reverse shock in the stellar wind might accelerate charged particles up to relativistic energies. Non-thermal radio emission of synchrotron origin has been detected, confirming the hypothesis. We have then modeled the system and we predict a spectral energy distribution that extends up to gamma-rays. Under some simplifying assumptions, we find that the intensity at high energies is too low to be detected by current instruments, but the future Cherenkov Telescope Array might detect the source.

Pour citer cet article

Gustavo E. Romero, Paula Benaglia, Cintia S. Peri, Josep Martí & Anabella T. Araudo, «Non-thermal radiation from a runaway massive star», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 420 - 424 URL : http://popups.ulg.ac.be/0037-9565/index.php?id=2901.

A propos de : Gustavo E. Romero

Instituto Argentino de Radioastronomía, CCT-La Plata, CONICET, C.C.5, (1894) Villa Elisa, Buenos Aires, Argentina, and Facultad de Ciencias Astronómicas y Geofísicas UNLP, Paseo del Bosque S/N, B1900FWA La Plata, Argentina

A propos de : Paula Benaglia

Instituto Argentino de Radioastronomía, CCT-La Plata, CONICET, C.C.5, (1894) Villa Elisa, Buenos Aires, Argentina, et

A propos de : Cintia S. Peri

Facultad de Ciencias Astronómicas y Geofísicas UNLP, Paseo del Bosque S/N, B1900FWA La Plata, Argentina

A propos de : Josep Martí

Instituto Argentino de Radioastronomía, CCT-La Plata, CONICET, C.C.5, (1894) Villa Elisa, Buenos Aires, Argentina, and Facultad de Ciencias Astronómicas y Geofísicas UNLP, Paseo del Bosque S/N, B1900FWA La Plata, Argentina

A propos de : Anabella T. Araudo

Departamento de Física (EPS), Universidad de Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain