Search results for "Masers stars"

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The kinematics of water masers in the stellar molecular outflow source, IRAS 19134+2131

2004

Using the Very Large Array (VLA) and the Very Long Baseline Array (VLBA), we have observed water maser emission in the proto-planetary nebula candidate IRAS 19134+2131, in which the water maser spectrum has two groups of emission features separated in radial velocity by ∼100 km s^−1. The blue-shifted and red-shifted clusters of maser features are clearly separated spatially by ∼150 mas, indicative of a fast collimated flow. However, not all of the maser features are aligned along the axis of the flow, as is seen in the similar high-velocity water maser source, W43A. Comparing the VLA and VLBA maps of the water maser source, we find 4 maser features that were active for 2 years. Using only V…

Stellar kinematicsAstrophysics::High Energy Astrophysical PhenomenaOutflowsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAGB and post-AGBlaw.inventionlawIndividual starsAstrophysics::Solar and Stellar AstrophysicsAsymptotic giant branchOH/IR starMaserMasers stars ; AGB and post-AGB ; Distances ; Kinematics Winds ; Outflows ; Individual stars ; IRAS 19134+2131Astrophysics::Galaxy AstrophysicsVery Long Baseline ArrayPhysicsNebulaKinematics WindsAstronomyIRAS 19134+2131Astronomy and AstrophysicsGalactic plane:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Masers starsDistancesRadial velocitySpace and Planetary ScienceUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]Astronomy & Astrophysics
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