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Direct Optical Imaging of Be Disks

Published online by Cambridge University Press:  12 April 2016

Philippe Stee
Philippe Stee*
Affiliation:
CNRS-UMR 6528, Département FRESNEL- Equipe GI2T, Observatoire de la Côte d’Azur, 2130 route de I’Observatoire, Caussols, 06460 St Vallier de Thiey, France

Abstract

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Interferometry in the visible now provides milliarcsecond spatial resolution and thus can be used for studying the circumstellar environment of Be stars. In this review I will first introduce the two basic quantities that an interferometer can access: the modulus and the phase of the visibility. I will illustrate how these two quantities can be used to understand the physics of Be disks through recent results from the VLA, the MkII and the GI2T interferometers. I will insist on the importance and the potential of coupling high angular resolution with high spectral resolution to the study of Be disks. Since the possibility of direct optical imaging of Be disks will be limited due to complexity and time consumption, I will present the role models can play in interpreting high angular resolution observations when direct imaging become difficult. Finally I will draw up a list of challenging objectives for the next generation of synthetic arrays (GI2T/REGAIN, Keck, ST3, VLTI) which will bring new understanding of active hot stars physics.

Type
2. New Missions
Information
International Astronomical Union Colloquium , Volume 175: The Be Phenomenon in Early-Type Stars , 2000 , pp. 129 - 140
Copyright
Copyright © Astronomical Society of the Pacific 2000

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