HR: 09:15h
AN: SH51C-06    [Abstracts]
TI: Hydrodynamic Modelling of a Multi-stranded, Nanoflare-heated Coronal Loop
AU: * Sarkar, A
EM: asarkar1@uclan.ac.uk
AF: University of Central Lancashire, Department of Physics, Astronomy and Mathematics, Preston, Lancashire, Lan PR1 8PL, United Kingdom
AU: Walsh, R W
EM: rwwalsh@uclan.ac.uk
AF: University of Central Lancashire, Department of Physics, Astronomy and Mathematics, Preston, Lancashire, Lan PR1 8PL, United Kingdom
AU: Noglik, J B
EM: jbnoglik@uclan.ac.uk
AF: University of Central Lancashire, Department of Physics, Astronomy and Mathematics, Preston, Lancashire, Lan PR1 8PL, United Kingdom
AB: There is a growing body of evidence that the loops seen with current instrumentation (SOHO, TRACE and Hinode) actually consist of many sub-resolution elements. Thus, the total emission we observe is the cumulative result of the radiation from numerous evolving plasma strands. This paper presents a "global loop" as 125 individual strands where each is modelled independently by a one-dimensional hydrodynamic simulation. The energy release mechanism across the strands consists of localised, discrete heating events (nanoflares) and the strands are "coupled" together through the frequency distribution of this energy input which follows a power law distribution. The simulated data is then folded through the response functions for both TRACE and Hinode/XRT. Overall for the TRACE emission appears very uniform along the global loop as it is originating mainly from plasma cooling into the passband. However, the corresponding XRT emission is much more structured, responding to both the heating and the cooling phases. The implications of these results upon the emission measure, resolving the coronal heating problem and possible future observing campaigns for will be discussed.
UR: http://www.star.uclan.ac.uk/~as1/AGU.html
DE: 7509 Corona
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting