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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
- Source :
- Monthly Notices of the Royal Astronomical Society. 428:349-353
- Publication Year :
- 2012
- Publisher :
- Oxford University Press (OUP), 2012.
-
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$_{2}$O masers are found to be clustered in the root of a bipolar radio jet. A molecular jet is detected by thermal SiO ($\upsilon$ = 0, $J$ = 2-1) emission. The SiO spectrum is extremely wide (-120 -- +87 km s$^{-1}$) and significantly blue-shift dominated, similar to the maser emission. The observed geometry and remarkable spectral similarity between H$_{2}$O maser and SiO strongly suggests the existence of a maser-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.<br />5 pages, 3 figures, 2 tables, accepted for publication in MNRAS
- Subjects :
- Physics
Astrophysics::High Energy Astrophysical Phenomena
Young stellar object
FOS: Physical sciences
Astronomy
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Spectral similarity
Blueshift
law.invention
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
law
Thermal
High mass
Astrophysics::Solar and Stellar Astrophysics
Maser
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
Flare
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 428
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....e97a763e05b4dada71d84c83a6301dc6