Hi Fabio,
Nice paper! Congratulations.! You could have cited the paper on the fuzziness (Tripathi et al. 2009 ApJ) along with your simulation paper (Gurazzi et al.2010)...
Cheers, -Durgesh
Assistant Professor IUCAA, Post Bag - 4 Ganeshkhind Pune 411007 India Ph.No: +91(0)2025604224
----- Original Message ----- From: "Fabio Reale" reale@astropa.unipa.it To: "A mailing list for scientists involved in the observation and modeling of solar loop structures" loops@solar.physics.montana.edu Sent: Thursday, 9 June, 2011 2:22:04 PM Subject: [Loops] [1106.1591] Solar Dynamics Observatory discovers thin high temperature strands in coronal active regions
Dear colleagues please find at the following link the preprint of a work accepted for publication on the ApJ Letters, showing new strong evidence of finely-structured loops with impulsive nanoflare activity in active regions:
http://arxiv.org/abs/1106.1591
The abstract is below.
Best regards Fabio Reale
Solar Dynamics Observatory discovers thin high temperature strands in coronal active regions
Authors: Fabio Reale, Massimiliano Guarrasi, Paola Testa, Edward E. DeLuca, Giovanni Peres, Leon Golub
Abstract: One scenario proposed to explain the million degrees solar corona is a finely-stranded corona where each strand is heated by a rapid pulse. However, such fine structure has neither been resolved through direct imaging observations nor conclusively shown through indirect observations of extended superhot plasma. Recently it has been shown that the observed difference in appearance of cool and warm coronal loops (~1 MK, ~2-3 MK, respectively) -- warm loops appearing "fuzzier" than cool loops -- can be explained by models of loops composed of subarcsecond strands, which are impulsively heated up to ~10 MK. That work predicts that images of hot coronal loops (>~6 MK) should again show fine structure. Here we show that the predicted effect is indeed widely observed in an active region with the Solar Dynamics Observatory, thus supporting a scenario where impulsive heating of fine loop strands plays an important role in powering the active corona.
_______________________________________________ Loops mailing list Loops@solar.physics.montana.edu https://mithra.physics.montana.edu/mailman/listinfo/loops