9 July 2018 Detecting exoplanets and characterizing their properties with fringe nulling
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Detecting exoplanets and characterizing their orbital properties is a difficult task, given the proximity of these objects relative to their host stars, as well as their brightness ratios. We present an interferometric fringe nulling technique, aimed at solving these issues. This technique uses baseline phases and takes advantage of the strong phase fluctuations, due to the presence of an exoplanet, that can be observed at spatial frequencies adjacent to the null crossing. We present initial results based on observations of the multiple stellar system η Aql, obtained with the Navy Precision Optical Interferometer, which indicate the presence of a Δm~5 mag close to the brightest star in this system.
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Henrique R. Schmitt, Ellyn K. Baines, J. Thomas Armstrong, and Sergio R. Restaino "Detecting exoplanets and characterizing their properties with fringe nulling", Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107012I (9 July 2018); doi: 10.1117/12.2312088; https://doi.org/10.1117/12.2312088

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