Speaker
Description
Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180-degree-ambiguity in the orientation of the transverse component. So far, the removal of such an ambiguity has required assumptions about the properties of the photospheric field, which makes disambiguation methods model-dependent.
The successful launch and operation of Solar Orbiter have made the removal of the 180-ambiguity possible solely using observations of the same location on the Sun obtained from two different vantage points. To that purpose, the Stereoscopic Disambiguation Method was recently developed and successfully tested on numerical simulations.
Here we present the first application of the SDM to data obtained by the High Resolution Telescope (HRT) onboard Solar Orbiter during the March 2022 campaign, when the angle with Earth was 27 degrees. The method is successfully applied to remove the ambiguity in the transverse component of the HRT vector magnetogram solely using observations (from HRT and from the Helioseismic and Magnetic Imager-HMI), for the first time.
The SDM is proven to provide observation-only disambiguated vector magnetograms that are spatially homogeneous and consistent.
While we present here an application combining PHI with HMI data, the same method can be applied to magnetic information from Solar Orbiter together with any Earth-bound observatory.
| Submit to 'solar physics' topical issue? | No |
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