12 September 2012 Imaging rapid rotators with the PAVO beam combiner at CHARA
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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.
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Vicente Maestro, Vicente Maestro, Yitping Kok, Yitping Kok, Daniel Huber, Daniel Huber, Michael J. Ireland, Michael J. Ireland, Peter G. Tuthill, Peter G. Tuthill, Tim White, Tim White, Gail Schaefer, Gail Schaefer, Theo A. ten Brummelaar, Theo A. ten Brummelaar, Harold A. McAlister, Harold A. McAlister, Nils Turner, Nils Turner, Christopher D. Farrington, Christopher D. Farrington, P. J. Goldfinger, P. J. Goldfinger, } "Imaging rapid rotators with the PAVO beam combiner at CHARA", Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450G (12 September 2012); doi: 10.1117/12.926881; https://doi.org/10.1117/12.926881

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