Multi-wavelength acoustic power maps and 3-d power spectra from SDO
Abstract
The 1600 and 1700 Angstrom bands of AIA are sensitive to the five-minute oscillations used in helioseismology. We investigate the acoustic response of these bands and the HMI velocity and continuum intensity to various kinds of local magnetic activity, including a current active region, a decayed active region, and quiet Sun. We will present maps of the acoustic power at various frequencies as a function of position and of spatial wavelength, for the AIA bands and for the HMI velocity and continuum intensity, and also maps of the relative phase and coherence of these observables. We will also consider the results of small-area local helioseismology for the HMI velocity in corresponding regions, and show that even weak fields can have distinct effects on the behavior of acoustic waves near the surface.
- Publication:
-
SDO-3: Solar Dynamics and Magnetism from the Interior to the Atmosphere
- Pub Date:
- October 2011
- Bibcode:
- 2011sdmi.confE..60H
- Keywords:
-
- SDO;
- SDO-3;
- SDO 3;
- SDO Workshop;
- LWS/SDO-3/SOHO-26/GONG-2011 Workshop;
- Solar Dynamic Observatory