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Spying on your neighbors with ultra-high precision

Published online by Cambridge University Press:  01 October 2007

W. C. Jao ,
T. J. Henry ,
J. P. Subasavage ,
P. A. Ianna ,
E. Costa  and
R. A. Méndez
W. C. Jao
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302, USA email: [email protected], [email protected], [email protected]
T. J. Henry
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302, USA email: [email protected], [email protected], [email protected]
J. P. Subasavage
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302, USA email: [email protected], [email protected], [email protected]
P. A. Ianna
Affiliation:
University of Virginia, Charlottesville, VA 22903, USA email: [email protected]
E. Costa
Affiliation:
Universidad de Chile, Santiago, Chile email: [email protected], [email protected]
R. A. Méndez
Affiliation:
Universidad de Chile, Santiago, Chile email: [email protected], [email protected]
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Abstract

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We are entering the era of microarcsecond astrometric accuracy. Breaking the milliarcsecond barrier will lead to consequent leaps in astronomical understanding of diverse topics. Here we review some current ground-based trigonometric parallax efforts and their recent scientific results. We highlight the current status of nearby star research, including the RECONS census of stars within a 10 pc horizon, white dwarfs and cool subdwarfs, and the push to detect substellar objects via astrometry. We also provide details about recent improvements in the methodology that have permitted the determination of parallaxes with ~1 milliarcsecond accuracy, and what might be done to push routinely into the sub-millarcsecond regime.

Keywords

astrometrystars: kinematicswhite dwarfssubdwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 421 - 428
Copyright
Copyright © International Astronomical Union 2008

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