Galactic Astrometry with VLBI

Astrometric very long baseline interferometry (VLBI) observations of stellar masers are an excellent method to determine distances and proper motions in our Galaxy. Large maser astrometry surveys, the Bar and Spiral Structure Legacy survey and the VLBI Exploration for Radio Astrometry, allowed astro...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2022-12, Vol.18 (S380), p.69-81
Main Author: Rygl, Kazi L. J.
Format: Article
Language:English
Subjects:
Antennas
Arrays
Astrometry
Black holes
Celestial bodies
Contributed Paper
Galactic structure
Masers
Space telescopes
Stars & galaxies
Very long base interferometry
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Description
Summary:Astrometric very long baseline interferometry (VLBI) observations of stellar masers are an excellent method to determine distances and proper motions in our Galaxy. Large maser astrometry surveys, the Bar and Spiral Structure Legacy survey and the VLBI Exploration for Radio Astrometry, allowed astronomers to determine fundamental Galactic parameters, such as the rotation curve and the distance to the Galactic centre, as well as to trace the spiral arms. In this review, the results of these surveys will be summarised and compared with astrometric measurements using other methods.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921323002545