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Practical study of optical stellar interferometry

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arxiv 2302.11925 v2 pith:RBBKCQ5S submitted 2023-02-23 astro-ph.IM

P. Rodriguez-Ovalle , A. Mendi-Martos , A .Angulo-Manzanas , I. Reyes-Rodriguez , M.Perez-Arrieta , M. A. Illarramendi , A. Sanchez-Lavega This is my paper · ORCID
classification astro-ph.IM
keywords turbulenceatmosphericdifferentinterferometerinterferometryopticalpracticalstellar
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In this work we present an observational technique and a detailed analysis of the stellar interferograms produced by three bright stars: Betelgeuse, Rigel and Sirius. It is shown that the atmospheric turbulence is responsible for the reduction of the long-exposure fringe visibility of the obtained interference patterns. By using different baselines in our interferometer, we are able to distinguish the decay of the visibility with the baseline, how different parameters such us the diameter of the holes in our interferometer or their distribution affects the pattern, and to measure the turbulence with the estimation of the Fried parameter r0. The work and methodology are presented as a method for postgraduate students that targets practical learning of optical interferometry in astronomy and how it is affected by several causes, such as the atmospheric turbulence.

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