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- Volume 80 - Année 2011
- Non-thermal radiation from a runaway massive star
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Non-thermal radiation from a runaway massive star
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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.
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Acerca 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
Acerca de: Paula Benaglia
Instituto Argentino de Radioastronomía, CCT-La Plata, CONICET, C.C.5, (1894) Villa Elisa, Buenos Aires, Argentina, et
Acerca de: Cintia S. Peri
Facultad de Ciencias Astronómicas y Geofísicas UNLP, Paseo del Bosque S/N, B1900FWA La Plata, Argentina
Acerca 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
Acerca de: Anabella T. Araudo
Departamento de Física (EPS), Universidad de Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain