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Intermittent maser flare around the high mass young stellar object G353.273+0.641 II: Detection of a radio and molecular jet

2012-09-19
Kazuhito Motogi, Kazuo Sorai, Kotaro Niinuma, Koichiro Sugiyama, Mareki Honma, Kenta Fujisawa

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${2}Omasersarefoundtobeclusteredintherootofabipolarradiojet.AmolecularjetisdetectedbythermalSiO(\upsilon=0,J=21)emission.TheSiOspectrumisextremelywide(120+87kms^{-1})andsignificantlyblueshiftdominated,similartothemaseremission.TheobservedgeometryandremarkablespectralsimilaritybetweenH{2}OmaserandSiOstronglysuggeststheexistenceofamaserscale(\sim$ 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

PDF

https://arxiv.org/pdf/1209.4313


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