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Proceedings Paper

Estimating errors in stellar angular diameters: does the NPOI see the pulsation of delta Cephei?
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Paper Abstract

We examine our measured Cepheid diameters and the uncertainties as estimated from observations of calibrators and check stars, using (delta) Cephei, for which we have the most data, as our example. The mean limb-darkened diameter of (delta) Cep is 1.520 +/- 0.014 mas. The pulsation is only weakly seen, if at all, a tantalizing result that however does not determine the distance with useful precision. The longer baselines currently under construction will provide both high-precision diameters and a post-facto check of our uncertainty estimates.

Paper Details

Date Published: 5 July 2000
PDF: 6 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390263
Show Author Affiliations
J. Thomas Armstrong, Naval Research Lab. (United States)
Robert B. Hindsley, Naval Research Lab. (United States)
David Mozurkewich, Naval Research Lab. (United States)
Arsen R. Hajian, U.S. Naval Observatory (United States)
Marvin E. Germain, U.S. Naval Observatory (United States)
Tyler E. Nordgren, U.S. Naval Observatory (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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