Signature of the Saturated Hanle Effect in the Linearly Polarized Coronal Fe XIV Emission Line

Signature of the Saturated Hanle Effect in the Linearly Polarized Coronal Fe XIV Emission Line | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Signature of the Saturated Hanle Effect in the Linearly Polarized Coronal Fe XIV Emission Line Hervé Haudemand, Silvano Fineschi, Lucia Abbo, Gerardo Capobianco, and 15 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9429232/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 5 You are reading this latest preprint version Abstract Direct measurements of magnetic fields in the solar corona is an open challenge in solar physics. Information about their topology can be derived from polarized observations of forbidden coronal emission lines through the saturated Hanle effect. In this work we present the first results from observations of the Fe XIV 530.3 nm emission line acquired during the total solar eclipse of April 8, 2024. We analyzed polarized images acquired by the Coronal Magnetograph (CorMag) that observed the solar corona from 1.05 up to 2 solar radii. Maps of the linear polarization angle were derived, and interpreted as an important signature of the saturated Hanle effect of forbidden lines, establishing a correlation with the direction of the local magnetic field. Comparisons with a Potential-Field Source-Surface model showed consistency between observed polarization patterns and the topology of modeled magnetic structures, particularly in the regions under study. These results confirmed the diagnostic potential of the saturated Hanle effect in forbidden coronal lines and validated the Coronal Magnetograph as an effective instrument for constraining coronal magnetic field models. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 11 May, 2026 Reviewers invited by journal 20 Apr, 2026 Editor assigned by journal 16 Apr, 2026 Submission checks completed at journal 16 Apr, 2026 First submitted to journal 15 Apr, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9429232","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":626295097,"identity":"2a62bcfa-85da-46d3-926e-da46d74f6792","order_by":0,"name":"Hervé 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