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GIOVANNI PERES

Fine Thermal Structure of a Coronal Active Region

  • Autori: REALE, F; PARENTI, S; REEVES, KK; WEBER, M; BOBRA, MG; BARBERA, M; KANO, R; NARUKAGE, N; SHIMOJO, M; SAKAO, T; PERES, G; GOLUB, L
  • Anno di pubblicazione: 2007
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: X-RAY TELESCOPE; LOOPS
  • OA Link: http://hdl.handle.net/10447/30771

Abstract

The determination of the fine thermal structure of the solar corona is fundamental to constraining the coronal heating mechanisms. The Hinode X-ray Telescope collected images of the solar corona in different passbands, thus providing temperature diagnostics through energy ratios. By combining different filters to optimize the signal-to-noise ratio, we observed a coronal active region in five filters, revealing a highly thermally structured corona: very fine structures in the core of the region and on a larger scale further away. We observed continuous thermal distribution along the coronal loops, as well as entangled structures, and variations of thermal structuring along the line of sight.