Observations of High Frequency and High Wavenumber Solar Oscillations
Abstract
Doppler shift measurements of the Na D(1) absorption line have revealed solar oscillations in a new regime of frequency and wavenumber. Oscillations of vertical velocities in the temperature minimum and low chromosphere of the Sun are observed with frequencies ranging up to 9.5 mHz. The fundamental modes appear with wavenumbers up to 5.33 Mm-1 (equivalent spherical harmonic degree, 3710). We find no evidence for chromospheric modes of 3 minute period.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1992
- Accession Number
- ADA250099
Entities
People
- A. M. Title
- D. N. Fernandes
- P. H. Scherrer
- T. D. Tarbell
Organizations
- Stanford University