Solar 5-MIN Oscillation Amplitude Anisotropy and Doppler Velocity Systematics
Abstract
Several measurements of 5-min velocity amplitudes have yielded confusing and conflicting information on the l and m dependence of the modal excitation (Kuhn and O'hanlon, 1983 - henceforth KO; Deubner, 1985; and Hill et al. 1985). The authors have obtained considerably more data than was described in KO using similar observing techniques. Additional analysis has illuminated a systematic effect related to the finite spatial resolution, and line asymmetry of the data that can lead to errors in inferred velocity amplitudes.
- Publication:
-
Advances in Helio- and Asteroseismology
- Pub Date:
- 1988
- Bibcode:
- 1988IAUS..123...63K