학술논문
CHARA/SPICA: a 6-telescope visible instrument for the CHARA Array
Document Type
Working Paper
Author
Mourard, Denis; Berio, Philippe; Pannetier, Cyril; Nardetto, Nicolas; Allouche, Fatme; Bailet, Christophe; Dejonghe, Julien; Geneslay, Pierre; Jacqmart, Estelle; Lagarde, Stéphane; Lecron, Daniel; Morand, Frédéric; Rousseau, Sylvain; Salabert, David; Spang, Alain; Albrecht, Simon; Anugu, Narsireddy; Bourges, Laurent; Brummelaar, Theo A. ten; Creevey, Orlagh; Deheuvels, Sebastien; de Souza, Armando Domiciano; Gies, Doug; Ligi, Roxanne; Mella, Guillaume; Perraut, Karine; Schaefer, Gail; Wittkowski, Markus
Source
SPIE Optical and Infrared Interferometry and Imaging VIII, p. 1218308 (2022)
Subject
Language
Abstract
With a possible angular resolution down to 0.1-0.2 millisecond of arc using the 330 m baselines and the access to the 600-900 nm spectral domain, the CHARA Array is ideally configured for focusing on precise and accurate fundamental parameters of stars. CHARA/SPICA (Stellar Parameters and Images with a Cophased Array) aims at performing a large survey of stars all over the Hertzsprung-Russell diagram. This survey will also study the effects of the different kinds of variability and surface structure on the reliability of the extracted fundamental parameters. New surface-brightness-colour relations will be extracted from this survey, for general purposes on distance determination and the characterization of faint stars. SPICA is made of a visible 6T fibered instrument and of a near-infrared fringe sensor. In this paper, we detail the science program and the main characteristics of SPICA-VIS. We present finally the initial performance obtained during the commissioning.