1. Correlative hard X-ray and Radio Studies. In the context of studying solar hard X-ray spectral development, I propose to complete my work on modeling the background spectrum in the hard X-ray domain. My idea is to use the rear-segment counts, obtained in real time, to generate a predictor of the front-segment background. There are two principal sources of time-variable background, namely the ordinary latitude effect and the precipitation signature ("electron storm" counts). These may have to be modeled separately, as will the spectral line features. I have already done a feasibility study and now need to make the techniuqe more user-friendly.
2. Correlative hard X-ray and Radio Studies. Armed with good background estimates, I propose to study the hard X-ray spectral variation in conjunction with microwave observations (OVRO and/or Nobeyama). For maximum efficiency I would prefer to work with radio astronomers. Prior to the workshop I will try to identify collaborators and a list of events to work on.
3. Coronal structural evolution during a flare. This is a new topic for which I hope to find others interested. Lyndsay Fletcher and I are doing a "first papers" contribution on this topic, but the work can be greatly extended. One very interesting simple variant on this subject concerns the possibility of gamma-ray line redshifts resulting from non-vertical magnetic fields in sunspot umbrae or penumbrae. The July 23 flare might offer an opportunity to explore this.
email address: hhudson@berkeley.ssl.edu