Solar Doppler shifts: sources of continuous spectra.
Abstract
Oscillation observations can be used to study non-oscillatory solar phenomena that exhibit Doppler shifts. The authors discuss several effects of these phenomena and their associated temporal and spatial power spectra: (1) They limit the signal-to-noise ratio and sometimes detectability of oscillation modes. (2) There is the potential for better understanding and/or detection of solar phenomena: surface rotation, supergranulation, granulation, active regions, giant cells, and mesogranulation. (3) Large-scale convection may spatially modulate oscillation modes, leading to a continuous background spectrum. (4) In regions of the spectrum where the resolution to separate modes is lacked, it is possible to determine upper limits for the integrated effects of modes.
- Publication:
-
Seismology of the Sun and the Distant Stars
- Pub Date:
- 1986
- Bibcode:
- 1986ASIC..169..105D
- Keywords:
-
- Continuous Spectra;
- Doppler Effect;
- Solar Oscillations;
- Solar Spectra;
- Convection Currents;
- Power Spectra;
- Signal To Noise Ratios;
- Solar Granulation;
- Solar Rotation;
- Solar Physics;
- Solar Oscillations:Solar Spectrum;
- Solar Spectrum:Solar Oscillations