MHD model in HMI pipeline

1. HMI/AIA science team meeting Sep. 8 -- 11, 2009 Stanford, CA MHD model in HMI pipeline

2. MHD models • Input : as initial & boundary values, the magnetic field data, in various formats and cadences, (and plasma parameters from observations) • Output : theoretical determination / extrapolation of • 3D magnetic and plasma structures, above the photosphere, and in interplanetary space including the high heliographic latitude region, • Temporal evolutions, and • Views from various directions • MHD models can give unobservables • MHD models can give observables by independent observations

3. Input, (quasi-) real-time base • EOF (experiment operations facility) preliminary data • Synoptic / synchronic maps/frames • Global MHD/non-MHD models • Disk data • (remapped in coordinates corrected in accordance with geometry & solar differential rotation) • Local “patch” maps • Local MHD/non-MHD models • AR • remapped

4. Daily MHD model (steady-state) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours on 8-CPU(core) system. • With characteristics eq. matching fixed Br condition, the quasi-steady state be obtained • Outputs: • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions • etc.

5. Daily MHD model (steady-state) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours in 8CPUs system. • With characteristics eq. matching fixed Br condition, the quasi-steady state be obtained • Outputs: • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions

6. Daily MHD model (steady-state) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours in 8CPUs system. • With characteristics eq. matching fixed Br condition, the quasi-steady state be obtained • Outputs: • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions

7. Daily MHD model (steady-state) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours in 8CPUs system. • With characteristics eq. matching fixed Br condition, the quasi-steady state be obtained • Outputs: • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions

8. Daily MHD model (steady-state) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours on 8-CPU system. • With characteristics eq. matching fixed Br condition • The quasi-steady state be obtained • Outputs: • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions • etc.

9. Daily MHD model (with time-varying Br) • Assumption: Polytrope in Eq. of state • Spatial resolution : ~ 5 degree • A few hours on 8-CPU system. • With characteristics eq. matching time-varying Br • Under development • Outputs: time-evolutions of • Open/closed coronal field structures • Rough estimation of flow speed and density • Magnetic field polarity at distant regions • Views from various directions • etc.

10. Surface magnetic field • From North pole, lon.90 dgr., south pole

11. movie

12. Models : contribution • surface flow: FLCT, ILCT, DAVE4VM, etc. • Complete or completed by induction Eq. • ier=(int)flct(argc,argv,deltat,deltas,sigma,nnx,nny,f1,f2,ef,ef,vx,vy,evx,evy,vm); • for quick-look purpose and/or • with calibrated data. • PSI’s MHD contribution ∂t Br=rot (v B)|r