The surface magnetic fields of M dwarfs are inherently multi-scale, dominated by small-scale structures while also hosting weaker large-scale components. Historically, these two aspects of stellar magnetism have been studied in isolation, using distinct diagnostic techniques - Zeeman broadening for small-scale fields and spectropolarimetry for large-scale fields. This separation has led to a fragmented understanding of M-dwarf magnetism, with these methods often producing highly discordant field strength measurements. We present our ongoing research aimed at bridging this divide by unifying small- and large-scale magnetic field measurements within a single modelling framework. Achieving this requires both higher-quality observations, particularly in the near-infrared, and the development of advanced computational techniques capable of capturing the inherently multi-scale nature of stellar magnetic fields. We demonstrate the first results of applying this integrated approach to several active M dwarfs. These results reveal significantly revised perspectives on the geometry and structure of low-mass magnetic fields, offering a more complete and coherent observational picture of convective dynamos, stellar magnetospheres and their interaction with potentially habitable exoplanets.
", "publication_date": "2026-06-01", "publisher": "Zenodo", "references": [ { "reference": "Kochukhov, O. (2021), A&ARv, 29, 1 https://doi.org/10.1007/s00159-020-00130-3" }, { "reference": "Kochukhov, O. (2026), A&A, 707, A16 https://doi.org/10.1051/0004-6361/202558827" }, { "reference": "Morin, J., et al. (2008), MNRAS, 390, 567 https://doi.org/10.1111/j.1365-2966.2008.13809.x" }, { "reference": "Morin, J., et al. (2010), MNRAS, 407, 2269 https://doi.org/10.1111/j.1365-2966.2010.17101.x" } ], "resource_type": { "id": "poster", "title": { "de": "Poster", "en": "Poster" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "subjects": [ { "subject": "magnetic fields" }, { "subject": "polarization" }, { "subject": "low-mass stars" }, { "subject": "stellar magnetic activity" } ], "title": "Towards a Unified Observational View of M-Dwarf Magnetism" }, "parent": { "access": { "owned_by": { "user": "478758" }, "settings": { "accept_conditions_text": null, "allow_guest_requests": false, "allow_user_requests": false, "secret_link_expiration": 0 } }, "communities": { "default": "9ba7fd7e-a60f-4b7a-b3da-a178c21c5fda", "entries": [ { "access": { "member_policy": "open", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "closed", "visibility": "public" }, "children": { "allow": false }, "created": "2026-04-06T12:19:20.716447+00:00", "custom_fields": { "subjects": [ { "id": "euroscivoc:769" }, { "id": "euroscivoc:763" }, { "id": "euroscivoc:1807" }, { "id": "euroscivoc:757" } ] }, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "9ba7fd7e-a60f-4b7a-b3da-a178c21c5fda", "links": {}, "metadata": { "curation_policy": "All proceeding submissions will be reviewed by the curator(s) to ensure they are from registered conference attendees (in person or virtual) and adhere to the conference code of conduct.
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