On the Nature of the Non-Thermal Radio Source at the Center of the Orion Streamers

Details On the Nature of the Non-Thermal Radio Source at the Center of the Orion Streamers On the Nature of the Non-Thermal Radio Source at the Center of the Orion Streamers

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010rmxaa..46..357t&link_type=abstract

Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 357-361 (2010) (http://www.astroscu.unam.mx/~rmaa/)

Astronomy and Astrophysics

Astronomy

Ism: Individual (Orion Streamers, Hh 222), Radiation Mechanisms: Non-Thermal, Radio Continuum: Ism

Scientific paper

We present VLA continuum observations at 20 and 6 cm toward a non-thermal radio source located at the Streamers region in Orion. We compare 1991 archive observations with newones taken by us in 2008. The radio source could be a young stellar source or an evolved object like a microquasar or even a jet from a radio galaxy. Our analysis shows that there is no evidence of changes in the flux densities between both epochs at a level higher than 10%. Also, we set an upper limit at a 3sigma level of 23 mas year(-1) for the proper motions. At the distance of Orion this implies an upper limit to the velocity in the plane of the sky of 45 km s(-1) . At 6 cm, we detect linearly polarized emission at a level of 5%, while at 20 cm we do not detect this emission above a level of 2%. We conclude that the non-thermal radio source most probably is a radio galaxy aligned by chance with the line of sight to the Streamers in Orion.

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