SIMBAD references

2005ApJ...622L.125I - Astrophys. J., 622, L125-L128 (2005/April-1)

A biconically expanding flow in W43A traced by SiO maser emission.

IMAI H., NAKASHIMA J.-I., DIAMOND P.J., MIYAZAKI A. and DEGUCHI S.

Abstract (from CDS):

We report Very Long Baseline Array and Very Large Array observations of 22 GHz H2O and 43 GHz SiO (v=1, J=1-0) maser emission as well as 7 mm continuum emission in W43A, which exhibits a highly collimated jet of molecular gas and a spherically expanding envelope very similar to that of an OH/IR star. The spatiokinematical structure of the H2O masers is well fitted to a precessing jet model with an expansion velocity of 150 km/s and a dynamical age of ∼50 yr. The spatiokinematical structure of the SiO masers is well fitted to a biconically expanding flow model, whose axis is parallel to the direction of the collimated jet. Astrometry of the H2O and SiO masers suggests that these maser sources have a common dynamical center, possibly as part of a binary system, within 70 AU. The SiO masers may be excited on the surface of the cone that has significant deceleration and interacts with the jet. A 7 mm continuum emission source is located ∼1300 AU away from these maser sources at a position angle of about -60° from the jet axis. The physical relation of the continuum to the maser sources is still unclear.

Abstract Copyright:

Journal keyword(s): Masers - Stars: AGB and Post-AGB - Stars: Mass Loss - Stars: Individual: Alphanumeric: W43A - Stars: Winds, Outflows

CDS comments: Parag. 2.1 : Ref. source J1851+0035 not identified

Simbad objects: 5

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2021.08.03-07:33:08

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