Pulsation Period Variations in the RRc Lyrae Star KIC 5520878
Authors: Michael Hippke, John G. Learned, A. Zee, William H. Edmondson, John F. Lindner, Behnam Kia, William L. Ditto, and Ian R. Stevens
Hippke et al.
2015 The Astrophysical Journal79842.
Provider: AAS Journals
Caption: Figure 15.
Stellar flux vs. time for the lumped masses versus springs model (black), based on the Equation (4) motion x2 of the outer mass with frequencies in the golden ratio, superimposed on Kepler data (gray).