{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:F5UIOB6WF37CMROCCC6I6AN6DX","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"de09a6e6e467963ef773327e4e40d4d06ed0a88f3b1c9c52adc3fdbca7b6bd47","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-15T05:31:30Z","title_canon_sha256":"b072537d6c38553704bbd0fd82e1a99cbf9c63a81fb2a423d8cf3c7ffc8c278a"},"schema_version":"1.0","source":{"id":"1603.04557","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.04557","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"arxiv_version","alias_value":"1603.04557v2","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.04557","created_at":"2026-05-18T01:10:30Z"},{"alias_kind":"pith_short_12","alias_value":"F5UIOB6WF37C","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F5UIOB6WF37CMROC","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F5UIOB6W","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:57cdb96ad4cce53e1c6533c760bd5fec806b8ca1a88001fc01122a1f7880e5f7","target":"graph","created_at":"2026-05-18T01:10:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"As star-forming clouds collapse, the gas within them fragments to ever-smaller masses. Naively one might expect this process to continue down to the smallest mass that is able to radiate away its binding energy on a dynamical timescale, the opacity limit for fragmentation, at $\\sim 0.01$ $M_\\odot$. However, the observed peak of the initial mass function (IMF) lies a factor of $20-30$ higher in mass, suggesting that some other mechanism halts fragmentation before the opacity limit is reached. In this paper we analyse radiation-magnetohydrodynamic simulations of star cluster formation in typical","authors_text":"Andrew T. Myers, Christopher F. McKee, Mark R. Krumholz, Richard I. Klein","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-15T05:31:30Z","title":"What Physics Determines the Peak of the IMF? Insights from the Structure of Cores in Radiation-Magnetohydrodynamic Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.04557","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f1cd9d14f7c15e0efd089d43a35f62dbbde3a5511ea35331ac6ea8078ce7f75a","target":"record","created_at":"2026-05-18T01:10:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"de09a6e6e467963ef773327e4e40d4d06ed0a88f3b1c9c52adc3fdbca7b6bd47","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-15T05:31:30Z","title_canon_sha256":"b072537d6c38553704bbd0fd82e1a99cbf9c63a81fb2a423d8cf3c7ffc8c278a"},"schema_version":"1.0","source":{"id":"1603.04557","kind":"arxiv","version":2}},"canonical_sha256":"2f688707d62efe2645c210bc8f01be1df2411e168b030375443afda5623f7e55","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f688707d62efe2645c210bc8f01be1df2411e168b030375443afda5623f7e55","first_computed_at":"2026-05-18T01:10:30.880364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:30.880364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hmhh0irtzh3ilOx4skgnKBz8pKK58w2TwTQMpFnjOjWRdJUrOD3rrgCLBurmdxZdcDyC3Om0wj3VlWBQ8RBYBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:30.880992Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.04557","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1cd9d14f7c15e0efd089d43a35f62dbbde3a5511ea35331ac6ea8078ce7f75a","sha256:57cdb96ad4cce53e1c6533c760bd5fec806b8ca1a88001fc01122a1f7880e5f7"],"state_sha256":"c11a422b5dcf9d3654d79fe457e14070feff3154a9d610fa3bf0166d0ee41709"}