Issue |
A&A
Volume 681, January 2024
Solar Orbiter First Results (Nominal Mission Phase)
|
|
---|---|---|
Article Number | A59 | |
Number of page(s) | 6 | |
Section | 9. The Sun and the Heliosphere | |
DOI | https://doi.org/10.1051/0004-6361/202346046 | |
Published online | 11 January 2024 |
A first rapid synoptic magnetic field map using SDO/HMI and SO/PHI data
1
Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
e-mail: loeschl@mps.mpg.de; solanki@mps.mpg.de
2
Instituto de Astrofísica de Andalucía (IAA-CSIC), Apartado de Correos 3004, 18080 Granada, Spain
e-mail: jti@iaa.es
3
Univ. Paris-Sud, Institut d’Astrophysique Spatiale, UMR 8617, CNRS, Bât. 121, 91405 Orsay Cedex, France
4
Instituto Nacional de Técnica Aeroespacial, Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Spain
5
Universitat de València, Catedrático José Beltrán 2, 46980 Paterna-Valencia, Spain
6
Leibniz-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany
7
Institut für Datentechnik und Kommunikationsnetze der TU Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig, Germany
8
University of Barcelona, Department of Electronics, Carrer de Martí i Franquès 1 – 11, 08028 Barcelona, Spain
9
Instituto Universitario “Ignacio da Riva”, Universidad Politécnica de Madrid, IDR/UPM, Plaza Cardenal Cisneros 3, 28040 Madrid, Spain
10
Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
11
Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut, EMI, Ernst-Zermelo-Str. 4, 79104 Freiburg, Germany
Received:
31
January
2023
Accepted:
2
October
2023
Context. Traditionally, the observation time needed to build synoptic maps of the solar magnetic field is bound to the 27 days of a full Carrington rotation due to the single viewpoint from Earth.
Aims. Our aim is to reduce this observation time to 13.5 days by combining magnetograms from two vantage points, 180° apart in longitude in the ideal case.
Methods. We combined observations taken by the Polarimetric and Helioseismic Imager (SO/PHI) during the superior conjunction of the Solar Orbiter in February 2021 with data from the Helioseismic and Magnetic Imager (SDO/HMI) and constructed a synoptic map of the line-of-sight magnetic field of CR 2240.
Resuls. The result is the first multi-view synoptic map using SDO/HMI and SO/PHI data from an observing period of only 16 days. Comparing the multi-view synoptic map to the standard synoptic map of SDO/HMI shows a significant amount of magnetic evolution between the dates on which the two instruments observed the same solar longitudes. The changed magnetic field was caught by the multi-view synoptic map but would have been missed by a standard synoptic map.
Conclusions. Our results demonstrate that multi-view synoptic maps provide a new method to obtain a more instantaneous map of the magnetic field over the entire solar surface.
Key words: Sun: photosphere / Sun: activity / Sun: magnetic fields
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe to Open model.
Open access funding provided by Max Planck Society.
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