Interferometry on Mira in the Mid‐Infrared: Cyclic Variability of the Continuum Diameter and the Effect of Spectral Lines on Apparent Size
The Astrophysical Journal2003Vol. 588(2), pp. 1064–1071
Citations Over TimeTop 10% of 2003 papers
Abstract
The size and variability of the continuum photosphere of o Ceti have been measured with 11 μm heterodyne interferometry to an accuracy of about 1%. Narrow bandwidths (~0.17 cm-1) were used to avoid spectral lines and measure continuum only. The resulting 11 μm diameter of o Cet is larger than the previously measured visible and near-infrared sizes. In addition, variations in the diameter with phase and a possible elongation have been observed. Visibilities were also measured at wavelengths known to contain strong H2O spectral contamination, giving larger apparent stellar sizes and information on the distribution of hot H2O gas.
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