{"paper":{"title":"GeV {\\gamma}-ray emission in the low-mass star-forming region AFGL 490","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Protostellar jet powers GeV gamma-ray source in AFGL 490 star-forming region","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Li-Nuo Yang, Pak-Hin Thomas Tam, Sheng Tang","submitted_at":"2026-05-15T00:14:23Z","abstract_excerpt":"We report the discovery of an extended GeV {\\gamma}-ray source, 4FGL J0330.7+5845e, associated with the star-forming region AFGL 490 using 17 years of Fermi-LAT data. The emission is spatially coincident with a dense molecular cloud and centered near the massive protostar AFGL 490. Its spectral energy distribution shows a distinct high-energy cutoff. Both leptonic and hadronic models can fit the {\\gamma}-ray spectrum, but energetic arguments rule out stellar winds as the primary accelerator. Instead, the protostellar jet driven by AFGL 490 is identified as a plausible site for particle acceler"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"the protostellar jet driven by AFGL 490 is identified as a plausible site for particle acceleration, and the derived timescales and maximum particle energies are consistent with theoretical predictions for such jets.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Energetic arguments rule out stellar winds as the primary accelerator. This premise assumes that wind power, mass-loss rates, and acceleration efficiency have been estimated accurately enough to exclude them, which if underestimated could reopen winds as a viable source.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Discovery of extended GeV gamma-ray emission from AFGL 490, with the protostellar jet identified as the likely particle accelerator rather than stellar winds.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Protostellar jet powers GeV gamma-ray source in AFGL 490 star-forming region","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"eba946857ab20ee186b6fa227e694cf7eeae179464efebb881e75fd0f67f9175"},"source":{"id":"2605.15489","kind":"arxiv","version":1},"verdict":{"id":"6ea610be-f010-44d4-93f8-2b44eed99808","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T16:02:46.301364Z","strongest_claim":"the protostellar jet driven by AFGL 490 is identified as a plausible site for particle acceleration, and the derived timescales and maximum particle energies are consistent with theoretical predictions for such jets.","one_line_summary":"Discovery of extended GeV gamma-ray emission from AFGL 490, with the protostellar jet identified as the likely particle accelerator rather than stellar winds.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Energetic arguments rule out stellar winds as the primary accelerator. This premise assumes that wind power, mass-loss rates, and acceleration efficiency have been estimated accurately enough to exclude them, which if underestimated could reopen winds as a viable source.","pith_extraction_headline":"Protostellar jet powers GeV gamma-ray source in AFGL 490 star-forming region"},"integrity":{"clean":false,"summary":{"advisory":0,"critical":1,"by_detector":{"doi_compliance":{"total":1,"advisory":0,"critical":1,"informational":0}},"informational":0},"endpoint":"/pith/2605.15489/integrity.json","findings":[{"note":"DOI '10.1142/4657' as printed in the bibliography is syntactically invalid and cannot resolve.","detector":"doi_compliance","severity":"critical","ref_index":39,"audited_at":"2026-05-19T16:15:56.363780Z","detected_doi":"10.1142/4657","finding_type":"broken_identifier","verdict_class":"incontrovertible","detected_arxiv_id":null}],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T16:31:18.231110Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T16:15:56.363780Z","status":"completed","version":"1.0.0","findings_count":1},{"name":"cited_work_retraction","ran_at":"2026-05-19T14:51:57.217685Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T14:21:54.073389Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"citation_quote_validity","ran_at":"2026-05-19T13:49:41.401202Z","status":"skipped","version":"0.1.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T13:33:22.649726Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"be5e18d9eaa4de261b40d0f48b5ef8df7b59070f93cebc0aef8f5a40ec3511c2"},"references":{"count":69,"sample":[{"doi":"10.1126/science.1210311","year":null,"title":"Science , keywords =","work_id":"068b7f21-abab-4bdb-968a-31f68842fa65","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1016/j.scib.2023.12.040","year":2023,"title":"Science Bulletin , keywords =","work_id":"dda738ac-61a3-4c3c-9c46-4baa01e2b32f","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1038/s41550-021-01318-y","year":null,"title":"Nature Astronomy , keywords =","work_id":"db78a21c-3c86-43e2-8e6f-88ee0e400f9e","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1051/0004-6361/201630213","year":null,"title":"Detection of diffuse gamma-ray emission near the young massive cluster NGC 3603","work_id":"9b127c43-9696-49b1-b55b-0b1c419f8329","ref_index":4,"cited_arxiv_id":"1612.02250","is_internal_anchor":true},{"doi":"10.1051/0004-6361/201732045","year":null,"title":"Diffuse gamma-ray emission in the vicinity of young star cluster Westerlund 2","work_id":"28b1a116-5cdd-42d7-8704-df6da079b0dc","ref_index":5,"cited_arxiv_id":"1710.02803","is_internal_anchor":true}],"resolved_work":69,"snapshot_sha256":"556676379646c358cb54f972d83c8ebc94cd0a0de522ce032a9ef5711a69c2aa","internal_anchors":29},"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"}