000003700 001__ 3700
000003700 005__ 20190114115044.0
000003700 037__ $$aCTALK-2019-0006
000003700 100__ $$aDecraemer, Bieke
000003700 245__ $$aThree-dimensional structure of a coronal streamer observed by SOHO/LASCO and STEREO/COR2
000003700 260__ $$c2018
000003700 269__ $$c2018-10-31
000003700 520__ $$aHelmet streamers are a prominent manifestation of magnetic structures with current sheets in the Solar corona. These large-scale structures are regions with high plasma density, overlying coronal active regions. We investigate the 3D structure of coronal streamers, observed by white-light coronagraphs (SOHO/LASCO and STEREO/COR2). 3D reconstruction of coronal structures is often ambiguous. Inverse reconstructions are difficult, so we design a forward model based on plausible assumptions about the 3D streamer structure taken from previous physical models (a plasma sheet centered around a current sheet). The streamer stalk is approximated by a plasma sheet, with electron density that is characterized by three functions describing the radial, transverse and face-on profiles respectively. We simultaneously fit the observational data from SOHO and STEREO vantage points using a multivariate minimization algorithm. We demonstrate that our model can reasonably describe the observations.
000003700 594__ $$aNO
000003700 700__ $$aZhukov, Andrei
000003700 700__ $$aVan Doorsselaere, Tom
000003700 773__ $$tSDO2018, Ghent, Belgium
000003700 8560_ $$fbieke.decraemer@observatoire.be
000003700 906__ $$aContributed
000003700 980__ $$aCTALKCONT