{"paper":{"title":"Rotationally modulated highly circularly polarised radio pulses from the rapidly rotating M dwarf ASKAP J181335-604720","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Strongly circularly polarized radio pulses from an M dwarf recur at fixed rotational phases and arise as coherent electron cyclotron maser emission in the magnetosphere.","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Biwei Jiang, Jundan Nie, Qichen Huang, Shaoteng Huang, Shouzhi Wang","submitted_at":"2026-05-15T03:53:02Z","abstract_excerpt":"We report the detection of strong, highly circularly polarised, and rotationally modulated radio pulses from the early-mid M dwarf ASKAP J181335-604720, based on strictly simultaneous radio and optical observations with the Australian Square Kilometre Array Pathfinder (ASKAP) and the Transiting Exoplanet Survey Satellite (TESS). The ASKAP data reveal recurrent broadband radio pulses across 800-1088 MHz, with peak circular polarisation fractions approaching 100%. A dominant period of P = 5.607 +- 0.003 h is derived from the TESS light curve using a Lomb-Scargle analysis, which we interpret as t"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Combining the observed characteristics, we interpret the emission as coherent electron cyclotron maser (ECM) radiation arising from the stellar magnetosphere, with the observed frequencies implying local magnetic field strengths of at least several hundred Gauss in the radio-emitting region.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the lack of detected optical flares in simultaneous TESS data at radio pulse epochs rules out any association with flare-driven coronal activity and that the emission originates purely from the magnetosphere.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Rotationally modulated radio pulses with near-100% circular polarization from M dwarf ASKAP J181335-604720 are interpreted as coherent electron cyclotron maser emission from its magnetosphere based on simultaneous radio-optical observations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Strongly circularly polarized radio pulses from an M dwarf recur at fixed rotational phases and arise as coherent electron cyclotron maser emission in the magnetosphere.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"f3684d6be2ba8ab6a6e5c132f56b3529fbaa342b747fd5cf70ed975c85e070eb"},"source":{"id":"2605.15587","kind":"arxiv","version":1},"verdict":{"id":"f5a13ad5-9e98-47ae-b871-87fc9748faa3","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T20:04:24.188847Z","strongest_claim":"Combining the observed characteristics, we interpret the emission as coherent electron cyclotron maser (ECM) radiation arising from the stellar magnetosphere, with the observed frequencies implying local magnetic field strengths of at least several hundred Gauss in the radio-emitting region.","one_line_summary":"Rotationally modulated radio pulses with near-100% circular polarization from M dwarf ASKAP J181335-604720 are interpreted as coherent electron cyclotron maser emission from its magnetosphere based on simultaneous radio-optical observations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the lack of detected optical flares in simultaneous TESS data at radio pulse epochs rules out any association with flare-driven coronal activity and that the emission originates purely from the magnetosphere.","pith_extraction_headline":"Strongly circularly polarized radio pulses from an M dwarf recur at fixed rotational phases and arise as coherent electron cyclotron maser emission in the magnetosphere."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.15587/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T20:31:19.238999Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T20:11:04.241544Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T19:34:35.244268Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T17:41:56.065828Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"f6bd9c224feb783c7f4116dcc10a8108a4d2626e9b08c9ab170bf249a9d53046"},"references":{"count":59,"sample":[{"doi":"10.1007/s11214-014-0042-x","year":2015,"title":"V., Branduardi-Raymont, G., Galand, M., et al","work_id":"1b91f952-1e3e-49b0-8503-28838ef1159a","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.3847/1538-4357/ac7d57","year":2022,"title":"Bastian, T. 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D., & Hallinan, G. 2022, ApJ, 935, 99, doi: 10.3847/1538-4357/ac7d57","work_id":"eb659494-76bd-4a6b-b999-0eba8f2c206a","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1146/annurev-astro-082708-101757","year":2010,"title":"O., & G¨ udel, M","work_id":"6cdaeead-cfc1-4eb0-a6d2-3cb70d97b2ba","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1994,"title":"O., & Guedel, M","work_id":"a214ba0c-c4b8-48f7-a44d-5b7fa39465bc","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.12942/lrsp-2005-8","year":2005,"title":"Living Reviews in Solar Physics , keywords =","work_id":"311aa09f-bcfa-4d9f-923f-2eabcb0cf6c7","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":59,"snapshot_sha256":"30f0c58faa43029551913a2b9f8285c03a12438f360cbfbf29d91e4fe19fff42","internal_anchors":3},"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"}