%0 Journal Article
%A López Santiago, Javier
%A Peri, C. S.
%A Bonito, R.
%A Miceli, M.
%A Albacete Colombo, J. F.
%A Benaglia, P.
%A Castro Rubio, Elisa de
%T Evidence of non-thermal x-ray emission from HH 80
%D 2013
%@ 2041-8205
%U https://hdl.handle.net/20.500.14352/34739
%X Protostellar jets appear at all stages of star formation when the accretion process is still at work. Jets travel at velocities of hundreds of km s^-1, creating strong shocks when interacting with the interstellar medium. Several cases of jets have been detected in X-rays, typically showing soft emission. For the first time, we report evidence of hard X-ray emission possibly related to non-thermal processes not explained by previous models of the post-shock emission predicted in the jet/ambient interaction scenario. HH 80 is located at the south head of the jet associated with the massive protostar IRAS 18162-2048. It shows soft and hard X-ray emission in regions that are spatially separated, with the soft X-ray emission region situated behind the region of hard X-ray emission. We propose a scenario for HH 80 where soft X-ray emission is associated with thermal processes from the interaction of the jet with denser ambient matter and hard X-ray emission is produced by synchrotron radiation at the front shock.
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