From the Dynamics of Cepheids to the Milky Way Rotation and the Calibration of the Distance Scale
Nardetto, N.; Kervella, P.; Barnes, T.; Bersier, D.; Fokin, A.; Fouqué, P.; Gillet, D.; Groh, J.; Kraus, S.; Mathias, P.; Mérand, A.; Millour, F.; Mourard, D.; Stoekl, A.
The Messenger, Vol. 134, pg. 20-24 (2008)
Abstract
High precision spectroscopic measurements of ten southern Galactic Cepheid stars with the High Accuracy Radial velocity Planet Searcher (HARPS) on the 3.6 m telescope at La Silla has allowed detailed analysis of the
dynamical structure of their atmospheres and close environment. The results have consequences for the calibration of the cosmic distance scale, and show that the rotation of the Milky Way is probably simpler than
previously thought. However, a full understanding of the effect of spectral line asymmetries still requires the development of dedicated models.
You can get this publication ...