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Proceedings Paper

Imaging rapid rotators with the PAVO beam combiner at CHARA
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Paper Abstract

Rotation plays a crucial role in the shaping and evolution of a star. Widely incorporated into early and late-stage stellar models, rotational effects remain poorly understood in main-sequence stars, mainly due to the absence of observations challenging contemporary models. The Precision Astronomical Visible Observations (PAVO) instrument, located at the Center for High Angular Resolution Astronomy (CHARA) array, provides the highest angular resolution yet achieved (0.3 mas) for stars V=8 magnitude and brighter. We describe instrumental techniques and advances implemented in PAVO@CHARA to observe heavily resolved targets and yield well calibrated closure phases which are key milestones on the pathway to delivery of the first-ever image in the visible of fast-rotating main-sequence star.

Paper Details

Date Published: 12 September 2012
PDF: 15 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450G (12 September 2012); doi: 10.1117/12.926881
Show Author Affiliations
Vicente Maestro, The Univ. of Sydney (Australia)
Yitping Kok, The Univ. of Sydney (Australia)
Daniel Huber, The Univ. of Sydney (Australia)
NASA Ames Research Ctr. (United States)
Michael J. Ireland, The Univ. of Sydney (Australia)
Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
Peter G. Tuthill, The Univ. of Sydney (Australia)
Tim White, The Univ. of Sydney (Australia)
Gail Schaefer, Georgia State Univ. (United States)
Theo A. ten Brummelaar, Georgia State Univ. (United States)
Harold A. McAlister, Georgia State Univ. (United States)
Nils Turner, Georgia State Univ. (United States)
Christopher D. Farrington, Georgia State Univ. (United States)
P. J. Goldfinger, Georgia State Univ. (United States)

Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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