Studying the non-thermal lobes of IRAS 16547−4247 through a multi-wavelength approach

Author： Munar-Adrover P. Bosch-Ramon V. Paredes J. M. Iwasawa K.

E-ISSN： 1432-0746|559|issue|A13-A13

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.559, Iss.issue, 2013-10, pp. : A13-A13

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Abstract

In recent years, massive protostars have turned out to be a possible population of high-energy emitters. Among the best candidates is IRAS 16547-4247, a protostar that presents a powerful outflow with clear signatures of interaction with its environment. This source has been revealed to be a potential high-energy source because it displays non-thermal radio emission of synchrotron origin, which is evidence of relativistic particles. To improve our understanding of IRAS 16547-4247 as a high-energy source, we analyzed XMM-Newton archival data and found that IRAS 16547−4247 is a hard X-ray source. We discuss these results in the context of a refined one-zone model and previous radio observations. From our study we find that it may be difficult to explain the X-ray emission as non-thermal radiation coming from the interaction region, but it might be produced by thermal Bremsstrahlung (plus photo-electric absorption) by a fast shock at the jet end. In the high-energy range, the source might be detectable by the present generation of Cherenkov telescopes, and may eventually be detected by Fermi in the GeV range.