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Fabio Reale,1,2*Susanna Parenti,3Kathy K. Reeves,4Mark Weber,4Monica G. Bobra,4Marco Barbera,1,2Ryouhei Kano,5Noriyuki Narukage,6Masumi Shimojo,7Taro Sakao,6Giovanni Peres,1,2Leon Golub4
The determination of the fine thermal structure of the solarcorona is fundamental to constraining the coronal heating mechanisms.The Hinode X-ray Telescope collected images of the solar coronain different passbands, thus providing temperature diagnosticsthrough energy ratios. By combining different filters to optimizethe signal-to-noise ratio, we observed a coronal active regionin five filters, revealing a highly thermally structured corona:very fine structures in the core of the region and on a largerscale further away. We observed continuous thermal distributionalong the coronal loops, as well as entangled structures, andvariations of thermal structuring along the line of sight.
1 Dipartimento di Scienze Fisiche ed Astronomiche, Sezione di Astronomia, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy. 2 Istituto Nazionale di AstroFisica/Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy. 3 Royal Observatory of Belgium, 3 Circular Avenue, B-1180 Brussels, Belgium. 4 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA. 5 National Astronomical Observatory, Mitaka, Tokyo 181-8588, Japan. 6 Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan. 7 Nobeyama Solar Radio Observatory, National Astronomical Observatory, Nobeyama, Nagano 384-1305, Japan.
* To whom correspondence should be addressed. E-mail: reale{at}astropa.unipa.it
