Microarcsecond Radio Astrometry
By M. J. Reid, M. Honma. 2013
140 citations recorded by the source corpus.
Astrometry provides the foundation for astrophysics. Accurate positions are required for the association of sources detected at different times or wavelengths, and distances are essential to estimate the size, luminosity, mass, and ages of most objects. Very long baseline interferometry at radio wavelengths, with diffraction-limited imaging at submilliarcsecond resolution, has long held the promise of microarcsecond astrometry. However, only in the past decade has this been routinely achieved. Currently, parallaxes for sources across the Milky Way are being measured with ∼10 μas accuracy, and proper motions of galaxies are being determined with accuracies of ∼1 μas year−1. The astrophysical applications of these measurements cover many fields, including star formation, evolved stars, stellar and supermassive black holes, Galactic structure, the history and fate of the Local Group, the Hubble constant, and tests of general relativity. This review summarizes the methods used and the astrophysical applicatio...
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/c15c8d42ac224a0df12117f707ea0f051e2ae173
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In Astronomy and Astrophysics
- Ramesh Narayan
- J. E. McClintock
- J. Steiner
- Ronald A. Remillard
- M. J. Reid
- Cosimo Bambi
- V. Dhawan
- D. Steeghs
Citations in the corpus
- A PARALLAX DISTANCE TO THE MICROQUASAR GRS 1915+105 AND A REVISED ESTIMATE OF ITS BLACK HOLE MASS (2014, background): “This serves two purposes: extending the coherence time of the interferometer by removing short term (∼minute) fluctuations of propagation delay through the troposphere (usually caused by variable water vapor) and providing a stationary position reference for the parallax fitting (Reid & Honma 2014).”