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Simulations

Step 1: Select simulation

The following simulations are available, please select one (BIFROST
simulations unless otherwise specified in the description)

24 x 24 x 17 Mm^3 with 48 km horizontal resolution and 19-100 km vertical resolution. 504x504x496 grid points. Average unsigned magnetic field strength in the photosphere is 5 mT (50 G) with two dominant opposite polarity regions 8 Mm apart - enhanced network. Non-equilibrium hydrogen ionization included.
24 x 24 x 17 Mm^3 with 31 km horizontal resolution and 12-82 km vertical resolution. 768x768x768 grid points. Average unsigned magnetic field strength in the photosphere is 4 mT (40 G) with no large scale magnetic field. The average signed magnetic field strength is 5 G mimicking a coronal hole. At the bottom boundary (2.5 Mm below the surface), a horizontal field of 200 G along the y-axis is fed into the inflows such that the field-strength is slowly increasing with time and there are interactions between the existing field and the flux emergence. Hydrogen is treated in LTE.
2D run: 96 x 43 Mm with 14 km horizontal resolution 12-70 km vertical resolution 6930x1554 grid points. The mean unsigned field at the photosphere is ~19 mT (190 G) with two dominant medium size opposite polarity regions (~5-10 Mm) 40 Mm apart Hydrogen and Helium are treated in LTE. Ion neutral interaction effects are taken into account using a Generalized Ohm's Law which includes the ambipolar diffusion and Hall term. Time series.
 
Time step 280 includes the artificial diffusion, for easy comparison with the figures in the Science paper (Martinez-Sykora et al 2017).
 
Time step 308 includes synthetic intensities included for Fe IX 171, SI IV 1402, Mg II h & k and Ca II 8542.
As en096014_gol but without Ion-neutral interaction effects.
3D run: 6 x 6 x 10.5 Mm with 5 km horizontal resolution 4-20 km vertical resolution 1200x1200x1736 grid points. The mean unsigned r.m.s. field at the photosphere is ~5.6 mT (56 G) developed via local dynamo. Hydrogen and Helium are treated in LTE. Ion neutral interaction effects are not taken into account.
24 x 24 x 17 Mm^3 with 48 km horizontal resolution and 19-100 km vertical resolution. 504x504x496 grid points. Initial atmosphere with very weak field (0.1 G).
 
At the bottom boundary (2.5 Mm below the surface), a horizontal field of 3363 G along the y-axis between x=4 Mm and x=16 Mm is fed into the inflows such that the field-strength is slowly increasing with time and there are strong interactions between the existing field and the flux emergence, giving rise to Ellerman Bomb and jet like phenomena. Hydrogen is treated in LTE.
98 x 49 x 49 Mm^3 with 192 km horizontal resolution and 64 km vertical resolution. 512x256x768 grid points. Simulation made with the MURaM code in the Heliophysics Grand Challenge Research project.
 
The simulation box contains an active region and a flare (equivalent to a GOES M class) driven by an emerging eruption. The setup is inspired by NAOAA Active region 12017 that appeared in late March and early April 2014. Gray radiative transfer and hydrogen treated in LTE.

See IRIS Technical Note 33 for a description of the simulations.

See IRIS Technical Note 35 for a description of the corresponding radiative transfer products

 

 

 

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