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Proceedings Paper

CHARA angular diameter measurements with a 330 meter baseline
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Paper Abstract

During the 2001 observing season, the CHARA Array was in regular operation for a combined program of science, technical development, test, and commissioning. Interferometric science operations were carried out on baselines up to 330 meters -- the maximum available in the six-telescope array. This poster gives sample results obtained with the approximately north-south telescope pair designated S1-E1. At operating wavelengths in the K band, the 330 m baseline is well suited to diameter determinations for angular diameters in the range 0.6 - 1.2 milliarcseconds. This is a good range for study of a wide range of hot stars. In this poster, angular diameters for a set of A,B and F stars are compared to results derived from other sources. These confirm CHARA performance in the range 3-10% in visibility. The normal stars follow a normal spectral type - surface brightness relation, and a classical Be star deviates from the norm by an amount consistent with its apparent colors.

Paper Details

Date Published: 21 February 2003
PDF: 4 pages
Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.459140
Show Author Affiliations
Stephen T. Ridgway, National Optical Astronomy Observatory (United States)
Theo Armand ten Brummelaar, CHARA Array/Mt. Wilson (United States)
William G. Bagnuolo, CHARA/Georgia State Univ. (United States)
David H. Berger, CHARA/Georgia State Univ. (United States)
Anders Jerkstrand, CHARA/Georgia State Univ. (United States)
Harold A. McAlister, CHARA/Georgia State Univ. (United States)
Laszlo Sturmann, CHARA Array/Mt. Wilson (United States)
Judit Sturmann, CHARA Array/Mt. Wilson (United States)
Mark A. Shure, Cleveland Clinic Foundation (United States)
Nils Henning Turner, CHARA Array/Mt. Wilson (United States)

Published in SPIE Proceedings Vol. 4838:
Interferometry for Optical Astronomy II
Wesley A. Traub, Editor(s)

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