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University of Nebraska - Lincoln

Cepheids

Faculty Publications, Department of Physics and Astronomy

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Full-Text Articles in Physics

Photometry Of Type Ii Cepheids. Ii. The Short-Period Stars, Edward G. Schmidt, Dale Johnston, Shawn Langan, Kevin M. Lee Apr 2005

Photometry Of Type Ii Cepheids. Ii. The Short-Period Stars, Edward G. Schmidt, Dale Johnston, Shawn Langan, Kevin M. Lee

Faculty Publications, Department of Physics and Astronomy

We present 668 new photometric observations for 24 Cepheids with periods less than 3 days. Most of the stars are probable type II Cepheids, but we have included some type I Cepheids for comparison. A discussion of the Fourier parameters of the light curves leads to the conclusion that they can be used to distinguish among the several types of light curves found among the type II stars but are of limited usefulness for distinguishing between type I and type II Cepheids. The pulsational stability is investigated by searching for long-term changes in the light-curve shapes, period changes, and light-curve ...