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Spectroscopic observations of pulsations in roAp stars
Published online by Cambridge University Press: 17 May 2006
Abstract
Spectacular progress in the observational study of rapidly oscillating Ap (roAp) stars has been achieved by considering high time- and spectral-resolution spectroscopy in addition to the classical high-speed photometric measurements. Such observations led to the discovery of a multitude of unexpected phenomena, generally pointing to an extreme vertical chemical non-uniformity of the atmospheres of magnetic CP stars. A detailed analysis of spectroscopic pulsational behaviour allows us to establish a relationship between pulsations and the vertical stratification of the chemical elements. This has become possible with the use of a Very Large Telescope on relatively bright stars. Using Extremely Large Telescopes promises farther heights for asteroseismology.
- Type
- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 1 , Symposium S232: Scientific Requirements for Extremely Large Telescopes , November 2005 , pp. 300 - 301
- Copyright
- 2006 International Astronomical Union