ILCT-Derived Flows are Consistent with Induction Eqn’s Normal Component!What about other components?Slide 3Can we extend ILCT to LOS data sets?Extending ILCT to LOS data sets, cont’d:Induction Equation’s ComponentsDemoulin & Berger (Sol. Phys. 2003): Effect of vertical motion on apparent horizontal motion U:ILCT-Derived Flows are Consistent with ILCT-Derived Flows are Consistent with Induction Eqn’s Normal Component! Induction Eqn’s Normal Component! zyxzyxzBtB)( v)( vvBB Directly measuredDirectly measuredDerived by ILCTDerived by ILCTDirectly measuredDirectly measuredCalculated by Calculated by Boundary CodeBoundary Code What about other components?What about other components?Derived Derived by ILCTby ILCTFrom NLFFFFrom NLFFFExtrapolation/Extrapolation/Prev. Time StepPrev. Time Step at photosphere, z = 0 above photosphere, z > 0)vv()vv()vv()vv(yzyzyxyxyxzxzxyxyxBBzBBxtBBBzBBytB)vv()vv()vv()vv(yzyzyxyxyxzxzxyxyxBBzBBxtBBBzBBytBDirectly measuredDirectly measuredCalculated by Calculated by Boundary CodeBoundary Code What about other components?What about other components?Derived Derived by ILCTby ILCTFrom NLFFFFrom NLFFFExtrapolation/Extrapolation/Prev. Time StepPrev. Time StepCan we extend ILCT to LOS data sets? Can we extend ILCT to LOS data sets? 0)( zzBtBu BvuzzBv, where• Near disk center, we can approximate BLOS Bz.• Use LCT to get uLCT, with LOSt to calculate uILCT that satisfies ind. eqn’s normal comp. • To decompose ILCT flow, uILCT , into (vx, vy, vz), we need B at photosphere – but lack measured B!• But we can use B from code – an educated guess for initial condition, then from current time step.Extending ILCT to LOS data sets, cont’d: Extending ILCT to LOS data sets, cont’d: • Long-duration data sets of MDI full-disk magneto- grams exist for most events in SOHO era! • Initial B(x,y,z) can be given by combination of global PFSS model, and local FFF consistent with X-ray/EUV observations.• In principle, can run data-driven simulations of almost all events in SOHO era!Induction Equation’s ComponentsInduction Equation’s Components xzxyzxyxzyxzyxzyxzyxzBtBBtBBtB)( v)()( v)()( v)(vvBBvvBBvvBBDemoulin & Berger (Sol. Phys. 2003): Effect of Demoulin & Berger (Sol. Phys. 2003): Effect of vertical motion on apparent horizontal motion vertical motion on apparent horizontal motion UU::Apparent horizontal motion can be either true horizontal motion, or vertical motion of a tilted field
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