(Proposal ID) S12A-034

(PI) Kurtz, Donald

(Proposal Title)
An exploratory study of the first bi-axial pulsating roAp star, KIC 10195926

(Abstract)
We have discovered the first pulsating star to have modes with different 
pulsation axes in data from the Kepler mission. The two axes are a result of 
different perturbations due to rotation,  a strong global magnetic, and 
different pulsation cavities  for the two modes. This is theoretically 
expected, but the theory is complex and needs observational constraint. 
Pulsational radial velocities  in roAp stars provide detailed mode information 
in 3D. We propose a 1-night exploration of the pulsation radial velocities in 
KIC 10195926 to determine the feasibility of an in-depth study. This star is 
one of only 140 stars (out of 150,000) that the Kepler Mission will observe in 
short cadence over the lifetime of the mission. Radial velocities provide 
detailed physical information that complements the photometric space data. 
Cooperation between Subaru and Kepler is important and beneficial. No 
telescope smaller than Subaru can make these proposed observations.