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Proceedings Paper

Recent results and perspectives for precision astrometry and photometry with adaptive optics
Author(s): Jessica R. Lu; Andrea M. Ghez; Sylvana Yelda; Tuan Do; Will Clarkson; Nate McCrady; Mark Morris
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Paper Abstract

Large ground-based telescopes equipped with adaptive optics (AO) systems have ushered in a new era of highresolution infrared photometry and astrometry. Relative astrometric accuracies of <0.2 mas have already been demonstrated from infrared images with spatial resolutions of 55-95 mas resolution over 10-20" fields of view. Relative photometric accuracies of 3% and absolute photometric accuracies of 5%-20% are also possible. I will review improvements and current limitations in astrometry and photometry with adaptive optics of crowded stellar fields. These capabilities enable experiments such as measuring orbits for brown dwarfs and exoplanets, studying our Galaxy's supermassive black hole and its environment, and identifying individual stars in young star clusters, which can be used test the universality of the initial mass function.

Paper Details

Date Published: 27 July 2010
PDF: 7 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361I (27 July 2010); doi: 10.1117/12.859737
Show Author Affiliations
Jessica R. Lu, California Institute of Technology (United States)
Andrea M. Ghez, Univ. of California, Los Angeles (United States)
Sylvana Yelda, Univ. of California, Los Angeles (United States)
Tuan Do, Univ. of California, Los Angeles (United States)
Will Clarkson, Univ. of California, Los Angeles (United States)
Nate McCrady, Univ. of Montana (United States)
Mark Morris, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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