New results and future perspectives of THEMIS .
Abstract
We reported on scientific results obtained during the run of two Joint Observing Programs in 2003, 2004 concerning ``New emergence flux and active regions `` (JOP157), ``Filaments and their environment'' (JOP178) and preliminary results of more recent campaigns. Results concerning filament support show the capability of THEMIS/MTR to detect weak magnetic polarities and measure the vector magnetic field curvature. Tangent magnetic field lines to the solar surface were found at the feet of filaments and also in Halpha +/-0.35 Å bright points close to penumbra. The bright points would be not due to high magnetic field concentration (1 KG) but to magnetic reconnection. The stability of filaments could be due to the existence of constant flux in its corridor where overlying arcades are anchored.
The comparison between THEMIS/MSDP and MDI shows the gain that we get. THEMIS is well adapted for measurements of weak field, the noise is much reduce compared to other instruments. For future campaigns we recommand to use alternatively the two modes: MSDP and MTR.- Publication:
-
Memorie della Societa Astronomica Italiana
- Pub Date:
- 2007
- Bibcode:
- 2007MmSAI..78..191S
- Keywords:
-
- magnetic fields;
- filaments;
- magnetic reconnection