HR: 0830h
AN: SP41A-06    [Abstracts]
TI: Coronal Loop Heating by Nanoflares: Non-thermal Velocities
AU: Patsourakos, S
EM: patsourakos@nrl.navy.mil
AF: Naval Research Laboratory, Space Science Division, Washington, DC 20375
AU: * Klimchuk, J A
AF: Naval Research Laboratory, Space Science Division, Washington, DC 20375
AB: Spectroscopic observations show non-negligible non-thermal velocities under coronal conditions. These motions place tight constraints on any coronal heating mechanism that should be able to reproduce them. We calculate the non-thermal velocities predicted by the nanoflare model. We perform 1D time-dependent hydrodynamic simulations of nanoflares occurring at sub-resolution strands, that make up the observed coronal loops and calculate profiles for representative spectral lines. We show that: (1) the calculated non-thermal velocities compare favorably with observations of cool and warm spectral lines and (2) the profiles of hot lines, that would be available in observations from the Extreme Ultraviolet Imaging Spectrometer (EIS) spectrometer onboard the SOLAR-B mission, can exhibit significant blue-wing asymmetries which can be used as a monitor of nanoflare properties. Research supported by NASA and ONR.
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly