{"paper":{"title":"Magnetic geometry of M dwarfs in the southern PLATO field","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"Six M dwarfs show diverse large-scale magnetic topologies tied to rotation and mass","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Carmona, A. F. Lanza, A. Vidotto, C. P. Folsom, G. A. J. Hussain, J. Morin, M. Diez, P. I. Cristofari, P. Petit, S. Bellotti, S. Messina, X. M. Delfosse","submitted_at":"2026-04-08T08:39:25Z","abstract_excerpt":"M dwarfs are the most abundant stars in the Galaxy and exhibit diverse magnetic behaviours. Understanding their large-scale magnetic fields is essential to study stellar dynamos and assess the impact of magnetic activity on planetary environments, yet their magnetic properties and long-term variability remain poorly characterised. We aim to characterise the large-scale magnetic fields of 6 M dwarfs in the southern PLATO field, with rotation periods from ~1 to 17 days and masses between 0.26 and 0.64 Msun. Five stars are partially convective, one fully convective, extending the mass-rotation di"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We report a wide diversity of magnetic topologies among the 6 M dwarfs, with 3 main results: (1) Rapidly-rotating (Prot < 2 d) early M dwarfs can generate dipole-dominated fields of moderate intensity, similar to less massive mid-M dwarfs; (2) rapidly-rotating mid-M dwarfs can generate non-axisymmetric large-scale fields with a significant toroidal component; (3) a moderately-rotating (Prot ~ 17 d) early M dwarf shows a surprisingly weak large-scale field.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Zeeman Doppler Imaging reconstructions from the available phase coverage and LSD profiles accurately recover the true large-scale topologies without major bias from incomplete sampling, small-scale field leakage, or assumptions about field geometry.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Six M dwarfs exhibit diverse large-scale magnetic topologies, with fast rotators showing dipole or non-axisymmetric toroidal fields and a moderate rotator showing weak fields.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Six M dwarfs show diverse large-scale magnetic topologies tied to rotation and mass","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"d1df76ff108b8c84ed6f3043164b8e3d59e276dd1ec54a899b1412e525ca51d5"},"source":{"id":"2604.06821","kind":"arxiv","version":2},"verdict":{"id":"c4962ca0-28a3-43a0-8e3b-fa91c31fd57a","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T18:24:18.580355Z","strongest_claim":"We report a wide diversity of magnetic topologies among the 6 M dwarfs, with 3 main results: (1) Rapidly-rotating (Prot < 2 d) early M dwarfs can generate dipole-dominated fields of moderate intensity, similar to less massive mid-M dwarfs; (2) rapidly-rotating mid-M dwarfs can generate non-axisymmetric large-scale fields with a significant toroidal component; (3) a moderately-rotating (Prot ~ 17 d) early M dwarf shows a surprisingly weak large-scale field.","one_line_summary":"Six M dwarfs exhibit diverse large-scale magnetic topologies, with fast rotators showing dipole or non-axisymmetric toroidal fields and a moderate rotator showing weak fields.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Zeeman Doppler Imaging reconstructions from the available phase coverage and LSD profiles accurately recover the true large-scale topologies without major bias from incomplete sampling, small-scale field leakage, or assumptions about field geometry.","pith_extraction_headline":"Six M dwarfs show diverse large-scale magnetic topologies tied to rotation and mass"},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.06821/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":4,"sample":[{"doi":"","year":null,"title":", \" * write output.state after.block = add.period write newline","work_id":"e8f9ea09-3c4c-4fbe-9e70-c403ce2d307a","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"write newline","work_id":"3a16abe4-80fe-40c6-84c6-3c19dc54c159","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"\" * write output.state after.block = add.period write newline","work_id":"f2991c5f-316b-4fdb-ae58-785aab5ea328","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"write newline","work_id":"71346d7f-b64e-444a-bd13-0c3c1e16fcea","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":4,"snapshot_sha256":"79c13b90c9cc38a1e521eb5c3f7fcb2f9e6ea3ec5dc09e77ab42314f00cddb84","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}