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Maser astrometry with VLBI and the SKA


Green, JA and Jan van Langevelde, H and Brunthaler, A and Ellingsen, S and Imai, H and Vlemmings, W and Reid, M and Richards, A, Maser astrometry with VLBI and the SKA, Advancing Astrophysics with the Square Kilometre Array, 9-13 June 2014, Giardini Naxos, Italy, pp. 73-81. ISBN 978-1-909204-70-6 (2015) [Refereed Conference Paper]



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Copyright 2015 the Author Licensed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

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We discuss the unique opportunities for maser astrometry with the inclusion of the Square Kilometre Array (SKA) in Very Long Baseline Interferometry (VLBI) networks. The first phase of the SKA will enable observations of hydroxyl and methanol masers, positioning the latter to an accuracy of 5 microarcseconds, and the second phase may allow water maser observations. These observations will provide trigonometric distances with errors as small as 1%. The unrivalled sensitivity of the SKA will enable large-scale surveys and, through joint operations, will turn any VLBI network into a fast astrometry device. Both evolved stars and high mass star formation regions will be accessible throughout the (Southern) Milky Way, completing our understanding of the content, dynamics and history of our Galaxy. Maser velocities and proper motions will be measurable in the Local Group of galaxies and beyond, providing new insights into their kinematics and evolution.

Item Details

Item Type:Refereed Conference Paper
Keywords:VLBI, masers, Galactic structure
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Ellingsen, S (Professor Simon Ellingsen)
ID Code:102565
Year Published:2015
Deposited By:Mathematics and Physics
Deposited On:2015-08-28
Last Modified:2017-11-03
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