Evento
Non-thermal processes in the bow shocks of hyper-velocity stars
Colaboradores:
Vasquez, Alberto Marcos
; Iglesias, Francisco A.; Sgró, Mario Agustín
; Reynoso, Estela Marta
Tipo del evento:
Reunión
Nombre del evento:
62° Reunión Anual de la Asociación Argentina de Astronomía
Fecha del evento:
13/10/2020
Institución Organizadora:
Universidad Nacional de Rosario;
Título de la revista:
Boletín de la Asociación Argentina de Astronomía
Editorial:
Asociación Argentina de Astronomía
ISSN:
0571-3285
e-ISSN:
1669-9521
Idioma:
Inglés
Clasificación temática:
Resumen
Runaway stars move at supersonic speed with respect to their surrounding medium. Such stars generate bow shocks in the interstellar gas as they propagate. These bow shocks are usually studied by means ofthe infrared radiation and the optical emission lines produced by the forward shock. However, bow shocks can also accelerate particles up to relativistic energies, which in turn produce broadband non-thermal emission. This radiation has been investigated in the reverse shocks of runaway stars with velocities of . 100 km s−1. In thiswork, we expand the research to the case of hyper-velocity stars with speeds reaching thousands of km s−1. We analyze their potential as particle accelerators and non-thermal radiation sources. In particular, we show that non-thermal processes are relevant in both the reverse and forward shocks. We estimate the broadband spectra and assess their detectability as a function of different parameters such as their spectral type, spatial velocity, and the medium density.
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Eventos(IAR)
Eventos de INST.ARG.DE RADIOASTRONOMIA (I)
Eventos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Non-thermal processes in the bow shocks of hyper-velocity stars; 62° Reunión Anual de la Asociación Argentina de Astronomía; Buenos Aires; Argentina; 2020; 274-276
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