ParSess46 - JSOC

Local HS 3: Subsurface Flows; Near-surface and Magnetic Effects

1. Helioseismic Signatures of Near-Surface Magnetic Fields (Doug Braun)

What are the helioseismic signatures of near-surface anomalies?
What are the effects of these on diagnostics of underlying thermal structure, flows, magnetic fields and other local physical anomalies in the solar interior?
What are the effects of various filtering and other analytical techniques applied to seismic observations containing the signatures of near-surface anomalies?
What can the above effects tell us about active region structure and dynamics (mode conversion, for example)?
What can/should be done about prospective artifacts caused by near-surface anomalies?

2. Further Magnetic Effects in Helioseismic Signatures (Paul Rajaguru)

What helioseismic signatures can be caused by variations in line profiles due to Zeeman splitting?
What supporting research can/needs to be done to separate these signatures from those of flows, sound-speed anomalies and other objects of helioseismic diagnostics?
What are the effects of phase-speed filtering on helioseismic diagnostics of thermal structure and flows beneath active regions?
Can these be credibly accounted for? If so, by what means?

3. The Role of MHD Simulations in Helioseismic Diagnostics (Konstantin Parchevsky)

What is the practicality of credible simulations of near-surface acoustics in the quiet Sun and active regions?
What kinds of seismic environments can be simulated?
What is the role of fully compressible simulations of convection with and without magnetic fields?

4. Large-Scale Flows (Rudi Komm)

What is needed for diagnostics of large-scale flows in the HMI era?
What are the effects of surface magnetic regions on seismic diagnostics of large scale flows, and how can we devise a realistic account for them?
What resources do we need to understand what drives large-scale flows?

5. Testing Helioseismic Methods for HMI (Aaron Birch)

What are the major control issues surrounding flows and near-surface and magnetic effects as presently understood?
What can MHD simulations give us for testing helioseismic models of local solar interior anomalies?
What is needed to derive realistic artificial data from simulations?
What control facilities can be developed without recourse to detailed MHD simulations?

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A Closely Related Topic in Session on KB Tools - Helioseismic & Magnetic Events (Friday @ 10:30 a.m.)

What can seismic emission from flares tell us about the mechanics of flares in the HMI era?
What control facilities does seismic emission from flares offer for helioseismic diagnostics?
What can seismic emission from flares tell us about the thermal structure and dynamics of the solar interior underlying magnetic regions?
What supporting observations of acoustically active flares would be useful?
What is the prospective utility of a white light flare alarm from the HMI pipeline in the solar and space-weather community at large?
What is the practicality of such a flare alarm?