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...a case in point? use of the SST, numerical simulations, and ひので in modelling dynamic fibrils, spicules, and mottles Romforskningsutvalget ved ITA 20-mars.

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Presentation on theme: "...a case in point? use of the SST, numerical simulations, and ひので in modelling dynamic fibrils, spicules, and mottles Romforskningsutvalget ved ITA 20-mars."— Presentation transcript:

1 ...a case in point? use of the SST, numerical simulations, and ひので in modelling dynamic fibrils, spicules, and mottles Romforskningsutvalget ved ITA 20-mars 2007

2 H-alpha core 4-oct-2005 Taken at the SST by Luc Rouppe van der Voort and Michiel van Noort Diffraction limited (0.2”), Ha linecenter at 1 s cadence, from 8:50 to 10:10 UT, m=0.78 (S8, E37)

3 Dynamic Fibrils Evolution

4 3d MHD simulations 3d Oslo Stagger Code; 5th order spatial interpolation, 3d order time stepping Non-grey radiative transfer w/ scattering the chromosphere; optically thin radiation in lower transition region and corona Thermal conduction along magnetic field Transmitting boundaries; allow control of entropy and magnetic field configuration that enters the computational box from below

5 Simulated Dynamic Fibrils Hansteen, De Pontieu et al ApJL 647, L73-L76 De Pontieu, Hansteen et al ApJ 655,

6 Observations vs. Simulations xt-plots Spicule-like features in simulations - due upwardly propagating shocks -show parabolic paths similar to those observed in DFs, as well as a host of other similarities... Observations Simulations

7 Observations vs. Simulations velocity/deceleration The correlation between maximum velocity along a DF and the deceleration is well reproduced by simulations. It is a consequence of the shock acceleration of dynamic fibrils. Rouppe van der Voort et al ApJL, in press

8 Japan/US/UK mission (Norway, ESA) Downlink at Svalbard Quick Look Software European Data Center in Oslo ひので( Hinode) Launch September 23, 2006

9 EIS observations of the upper atmosphere

10 ... and indeed spicules at the limb SOT observations Ca H show many dynamic phenomena...

11 Oslo Stagger Code simulation of SOT Ca H at the limb...simulation to be shown at NASA’s Hinode press conference tomorrow March 21, 2007.

12 combination of simulation and observation is a very powerful tool ground based and space based methods are complimentary access to and expertise in all three methods has allowed the solar group at ITA to be a leader in the field


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