Speaker
Description
First Name: Francisca
Last Name: Santos Ferreira
Affiliation: Max Planck for the Solar System Research
All Authors: Francisca Santos, Philipp Löschl, Gherardo Valori, Johann Hirzberger, Daniele Calchetti , Hanna Strecker, David O. Suárez and Sami K. Solanki
Abstract: Magnetic synoptic maps are a commonly used data product aiming to represent the full-surface photospheric magnetic field of the Sun in a single image. By combining measurements of the magnetic field observed near the central meridian over the course of a Carrington Rotation, they provide a global view of the solar surface. These maps are of particular interest for magnetic field extrapolations and are used as boundary conditions for coronal and heliospheric models. The development of these maps started with the assumption that measurements could only be taken from Earth’s viewpoint, requiring around 27 days to produce a complete map. However, with deep space missions operating in different orbital perspectives, such as e.g. Solar Orbiter and Vigil, complementary viewpoints become available, allowing for faster and more temporally consistent maps. Building on work done combining SDO/HMI and SO/PHI data to produce fast Line of Sight (LoS) magnetic synoptic maps [1][2], this work will explore two topics: the production of multi-viewpoint magnetic field vector synoptic maps and the magnetic field in the polar regions. Vector maps will provide the full magnetic field orientation, essential for more realistic extrapolations. In parallel, the representation of the polar regions, where observational gaps exist, will be assessed by using the observations of the solar poles provided by SO/PHI. This work will also contribute to preparations for higher level data products from the PMI instrument on ESA's Vigil mission at L5. [1] P. Loeschl, J. Hirzberger, S. K. Solanki, J. Schou, G. Valori. Synoptic maps from two viewpoints - Preparing for maps from SDO/HMI and SO/PHI data. A&A 682 A108 (2024). DOI: 10.1051/0004-6361/202346044 [2] P. Loeschl, et al. A first rapid synoptic magnetic field map using SDO/HMI and SO/PHI data. A&A 681 A59 (2024). DOI: 10.1051/0004-6361/202346046