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López Santiago, Javier and Peri, C. S. and Bonito, R. and Miceli, M. and Albacete Colombo, J. F. and Benaglia, P. and Castro Rubio, Elisa de (2013) Evidence of non-thermal x-ray emission from HH 80. Astrophysical journal letters, 776 (2). ISSN 2041-8205
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Official URL: http://dx.doi.org/10.1088/2041-8205/776/2/L22
Abstract
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.
Item Type: | Article |
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Additional Information: | © 2013. The American Astronomical Society. |
Uncontrolled Keywords: | Protostellar jet HH-154; Photon imaging camera; XMM-Newton; Massive protostars; Radiative knots; Orion-nebula; DG-Tauri; Discovery; Star; Ultraviolet |
Subjects: | Sciences > Physics > Astrophysics Sciences > Physics > Astronomy |
ID Code: | 30999 |
Deposited On: | 22 Jun 2015 14:49 |
Last Modified: | 10 Dec 2018 15:05 |
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