Analysis of surface structures of chemically peculiar stars with modern and future interferometers

D. Shulyak; K. Perraut; Claudia Paladini; G. Li Causi; Stephane Sacuto; O. Kochukhov

doi:10.1117/12.2055555

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24 July 2014 Analysis of surface structures of chemically peculiar stars with modern and future interferometers

D. Shulyak, K. Perraut, Claudia Paladini, G. Li Causi, Stephane Sacuto, O. Kochukhov

Author Affiliations +

Proceedings Volume 9146, Optical and Infrared Interferometry IV; 91462V (2014) https://doi.org/10.1117/12.2055555
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Interferometry is a very powerful observational technique known in astronomy for many decades. Its application to main-sequence stars, however, is still limited to only brightest objects. In this work we aim to explore the application of interferometry to a special class of main-sequence stars known as chemically peculiar (CP) stars. These stars demonstrate surface chemical abundance inhomogeneities (spots) that usually cover a considerable part of the stellar surface and induce a pronounced spectral and photometric variability. Interferometry thus has a potential to naturally resolve such spots in single stars, providing unique complementary information about spots sizes and contrasts. By means of numerical experiments we derive the actual interferometric requirements essential for the CP stars research that can be addressed in future instrument development. The first comparison between theoretical predictions and already available observations will also be discussed.

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D. Shulyak, K. Perraut, Claudia Paladini, G. Li Causi, Stephane Sacuto, and O. Kochukhov "Analysis of surface structures of chemically peculiar stars with modern and future interferometers", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 91462V (24 July 2014); https://doi.org/10.1117/12.2055555

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