The proposed collaborative investigation uses high-cadence, high-resolution (HR) MDI magnetogram, dopplergram, and intensity data, in combination with data from coronal instruments on SoHO, Yohkoh, and, when available, TRACE, to help identify and characterize the EUV counterparts to X-ray Bright Points (BPs). Also sought is the more difficult goal of (a) determining the conditions under which BPs evolve into emerging active regions, or (b) establishing that BPs and emerging active regions are two distinct classes. The underlying photospheric magnetic structure and its evolution may be key factors in BP character and persistence. Phase 1 of the project concentrates on correlative studies of potential targets in common fields of view, and spatial mapping and time histories of common sources in different wavebands. In Phase 2, the spectral diagnostic power of CDS and SUMER will be brought to bear on chosen BP targets (by use of near-realtime commanding, or possibly by receipt of a location flag from EIT?, to move to selected locations) to obtain plasma parameters such as density, temperature, emission measure, and composition.
This study supports SoHO JOP 23 and is complementary to JOP 1.
Complete text of proposal.