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http://hdl.handle.net/20.500.12386/34863
Title: | First Metis Detection of the Helium D₃ Line Polarization in a Large Eruptive Prominence | Authors: | Heinzel, Petr Jejčič, Sonja Štěpán, Jiří SUSINO, ROBERTO ANDRETTA, Vincenzo RUSSANO, Giuliana FINESCHI, Silvano ROMOLI, MARCO BEMPORAD, Alessandro Berlicki, Arkadiusz BURTOVOI, Aleksandr Da Deppo, Vania DE LEO, Yara Grimani, Catia JERSE, GIOVANNA LANDINI, FEDERICO Naletto, Giampiero NICOLINI, Gianalfredo PANCRAZZI, Maurizio del Pino Alemán, Tanausú SASSO, CLEMENTINA SPADARO, Daniele STANGALINI, MARCO TELLONI, Daniele Teriaca, Luca USLENGHI, Michela Arévalo, Andrés Vicente |
Issue Date: | 2023 | Journal: | THE ASTROPHYSICAL JOURNAL LETTERS | Number: | 957 | Issue: | 1 | First Page: | L10 | Abstract: | Metis on board Solar Orbiter is the space coronagraph developed by an Italian-German-Czech consortium. It is capable of observing solar corona and various coronal structures in the visible-light (VL) and UV (hydrogen Lyα) channels simultaneously for the first time. Here we present observations of a large eruptive prominence on 2021 April 25-26, in the VL, taken during the mission cruise phase, and demonstrate that apart from the broadband continuum emission, which is due to the Thomson scattering on prominence electrons, we detect a significant radiation in the neutral-helium D3 line (587.6 nm), which lies within the Metis VL passband. We show how the prominence looks like in Stokes I, Q, and U. We consider two extreme cases of the prominence magnetic field, and we separate the Stokes I and Q signals pertinent to Thomson scattering and to the D3 line. The degree of linear polarization of the D3 line (both Q and U) indicates the presence of the prominence magnetic field; hence Metis can serve as a magnetograph for eruptive prominences located high in the corona. | URI: | http://hdl.handle.net/20.500.12386/34863 | URL: | https://api.elsevier.com/content/abstract/scopus_id/85177085342 https://iopscience.iop.org/article/10.3847/2041-8213/acff62 |
ISSN: | 2041-8205 | DOI: | 10.3847/2041-8213/acff62 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Heinzel_2023_ApJL_957_L10.pdf | Pdf editoriale | 664.67 kB | Adobe PDF | View/Open |
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