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

Abstract

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.

2 pages, 1 figure. Proceedings of IAU Symposium 307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry

References in corpus (2)

• Period and light curve fluctuations of the Kepler Cepheid V1154 Cyg
• Cepheid distances from the Baade-Wesselink method