Abstract
We report the first detection of a radio-continuum and molecular jet associated with a dominant blue-shifted maser source, G353.273+0.641. A radio jet is extended 3000 au along NW-SE direction. H${2}Omasersarefoundtobeclusteredintherootofabipolarradiojet.AmolecularjetisdetectedbythermalSiO(\upsilon=0,J=2−1)emission.TheSiOspectrumisextremelywide(−120–+87kms^{-1})andsignificantlyblue−shiftdominated,similartothemaseremission.TheobservedgeometryandremarkablespectralsimilaritybetweenH{2}OmaserandSiOstronglysuggeststheexistenceofamaser−scale(\sim$ 340 au) molecular jet that is enclosed by the extended radio jet. We propose a “disc-masking” scenario as the origin of the strong blue-shift dominance, where an optically thick disc obscures a red-shifted lobe of a compact jet.
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URL
https://arxiv.org/abs/1209.4313