Mode visibilities in radial velocity and intensity Sun-as-a-star   helioseismic measurements
  We analyze more than 5000 days of Sun-as-a-star radial velocity GOLF and intensity VIRGO observations to measure the visibilities of the l=0, 1, 2, and 3 modes and the m-amplitude ratios of the l=2 and 3 modes in the solar acoustic spectrum. We provide observational values that we compare to theoretical predictions. 
David Salabert, Jerome Ballot, Rafael A Garcia
astro-ph.SR