RMxAA

Revista Mexicana de Astronomía y Astrofísica

ISSN: 3061-8649
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Keywords

ISM: individual (Orion Streamers
HH 222)
radiation mechanisms: non-thermal
radio continuum: ISM

How to Cite

On the Nature of the Non-Thermal Radio Source at the Center of the Orion Streamers. (2010). Revista Mexicana De Astronomía Y Astrofísica, 46(2), 357-361. https://astronomia.unam.mx/journals/rmxaa/article/view/2010rmxaa..46..357t

Abstract

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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