Search Publications
First Hard X-Ray Imaging Results by Solar Orbiter STIX
Volpara, Anna; Massa, Paolo; Krucker, Säm +15 more
The Spectrometer/Telescope for Imaging X-rays (STIX) is one of six remote sensing instruments on-board Solar Orbiter. The telescope applies an indirect imaging technique that uses the measurement of 30 visibilities, i.e., angular Fourier components of the solar flare X-ray source. Hence, the imaging problem for STIX consists of the Fourier inversi…
Disambiguation of Vector Magnetograms by Stereoscopic Observations from the Solar Orbiter (SO)/Polarimetric and Helioseismic Imager (PHI) and the Solar Dynamic Observatory (SDO)/Helioseismic and Magnetic Imager (HMI)
Hirzberger, Johann; Valori, Gherardo; Chen, Feng +3 more
Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180∘ ambiguity in the orientation of the transverse component. The successful launch and operation of Solar Orbiter have made the removal of the 180∘ ambiguity possible using solely observations obtained from two dif…
Tomography of the Solar Corona with the Metis Coronagraph I: Predictive Simulations with Visible-Light Images
Romoli, Marco; Frassati, Federica; Bemporad, Alessandro +5 more
The Solar Orbiter/Metis coronagraph records full-Sun visible-light polarized brightness (p B -) images of the solar corona. This work investigates the utility of a synoptic observational program of Metis for tomographic reconstruction of the three-dimensional (3D) distribution of the electron density of the global solar corona. During its lifetime…
A Statistical Comparison of EUV Brightenings Observed by SO/EUI with Simulated Brightenings in Nonpotential Simulations
Harra, Louise K.; Barczynski, Krzysztof; Berghmans, David +3 more
The High Resolution Imager (HRIEUV) telescope of the Extreme Ultraviolet Imager (EUI) instrument onboard Solar Orbiter has observed EUV brightenings, so-called campfires, as fine-scale structures at coronal temperatures. The goal of this paper is to compare the basic geometrical (size, orientation) and physical (intensity, lifetime) pro…