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Amplitude Modulation of Cepheid Radial Velocity Curves as a Systematic Source of Uncertainty for Baade-Wesselink Distances

Published online by Cambridge University Press:  23 January 2015

Richard I. Anderson
Richard I. Anderson*
Affiliation:
Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland email: [email protected]
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Abstract

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I report on the recent discovery of modulation in the radial velocity curves in four classical Cepheids. This discovery may enable significant improvements in the accuracy of Baade-Wesselink distances by revealing a not previously considered systematic source of uncertainty.

Keywords

techniques: radial velocitiesstars: individual ℓ Carinaestars: oscillationssupergiantsCepheidsdistance scale
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 286 - 287
Copyright
Copyright © International Astronomical Union 2015 

References

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