The search for g modes
Abstract
The Phoebus group was set up about 5 years ago with the expressed purpose to detect the g modes predicted by helioseismology to occur in the sun. The current status will be reviewed including new approaches proposed by other groups in the field. Over the years, the upper limit to g-mode amplitude set by Appourchaux et al. (2000) (10 mm/s at 10 σ) has been lowered due to a longer time series as well as new detection techniques. Not withstanding these efforts the chance of a positive detection still appears remote with the current upper limit still way above that predicted by helioseismology. New techniques in particular observations involving limb intensity and/or velocity cross-correlations against various observables, or even the detection of gravitational waves may offer the best hope for a future positive detection.
- Publication:
-
GONG+ 2002. Local and Global Helioseismology: the Present and Future
- Pub Date:
- February 2003
- Bibcode:
- 2003ESASP.517..131A
- Keywords:
-
- Intensity;
- p-Modes;
- SOHO;
- Sun