3-D Reconstruction of Structure and Dynamics of Coronal Twistors From STEREO and SDO Imagery

Abstract:

Although observed anecdotally for decades in H-alpha and EUV, so-called coronal 'tornadoes' have only recently become the focus of systematic and quantitative study and modeling. This increased focus has primarily been driven by data from the SDO observatory and more recently the IRIS observatory and ground-based telescopes. These ubiquitous magnetic structures differ in appearance and apparent dynamics depending upon position on the sun relative to the observer and upon observational wavelength. One of the key outstanding questions is whether they are actually rotating structures. Progress has been made using spectroscopic observations (IRIS, etc.) but the question is still not settled. We will present true stereographic movies of a set of these structures at various locations on the sun, using combinations of simultaneous STEREO and SDO imagery, in order to address the question of the actual motion of the structures.