SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 93: Exp. Methods – Scint., HESS, Auger
T 93.3: Vortrag
Mittwoch, 22. März 2023, 18:00–18:15, POT/0081
Intensity Interferometry at H.E.S.S. - Introduction and first Results — •Andreas Zmija1, Naomi Vogel1, Gisela Anton1, Stefan Funk1, Alison Mitchell1, Frederik Wohlleben2, and Adrian Zink1 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP — 2MPG Heidelberg
It has been less than a decade since astronomers rediscovered the concept of intensity interferometry, originally developed by Hanbury Brown & Twiss in the late 1950s, but state-of-the-art electronics have led to tremendous progress in recent years. The technique of correlating photon streams rather than interfering electromagnetic waves between telescopes is almost insensitive to atmospheric effects, and thus promises an increase in angular resolution in the optical regime by an order of magnitude. Since large light collection areas are preferred to optical quality mirrors, Imaging Atmospheric Cherenkov Telescopes are optimally suited for being equipped as intensity interferometer. In April 2022 we performed first photon correlation measurements with two of the H.E.S.S. Phase I telescopes during the moonlight break. We give a brief introduction into the method intensity interferometry, and present the first results of angular diameter measurements of the two stars Lambda Scorpii and Sigma Sagittarii.