Balloon at Wrocław
Constraints on angular numbers of pulsation modes
from spectroscopy

John Telting,   Wrocław,   June 2008
page 23
-5 -1 +1 +5

Identification of the main mode in the sdB star Balloon090100001
 

  observed radial velocity amplitude = 15 km/s

  model mode: L=0 (radial mode)
  model pulsation amplitude = 22 km/s
  model line broadening = 22 km/s
  inclination = any

  Radial mode fits good.
L≥2 modes can be excluded!