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

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

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4006..634a&link_type=abstract

Proc. SPIE Vol. 4006, p. 634-639, Interferometry in Optical Astronomy, Pierre J. Lena; Andreas Quirrenbach; Eds.

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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