{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WD7FHV5JN3OGOPUGX6NYKDA6W7","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":"d52e83ccc14f0ff83329db4a0c317520de555e4ec7d2aaddddfd69f637acf57f","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-20T13:05:40Z","title_canon_sha256":"7304ddae279f45d0e04ffd2eede50dc9393d653e10af958dc4990f62269ee8e0"},"schema_version":"1.0","source":{"id":"1804.07590","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.07590","created_at":"2026-05-18T00:17:02Z"},{"alias_kind":"arxiv_version","alias_value":"1804.07590v1","created_at":"2026-05-18T00:17:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.07590","created_at":"2026-05-18T00:17:02Z"},{"alias_kind":"pith_short_12","alias_value":"WD7FHV5JN3OG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WD7FHV5JN3OGOPUG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WD7FHV5J","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:fa9b99914fcede6b2a49e55f0c216ef1bb78d6663107f306ea271e85596624b9","target":"graph","created_at":"2026-05-18T00:17:02Z","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":"Ions and electrons play an important role in various stages of the star formation process. By following the magnetic field of their environment and interacting with neutral species, they slow down the gravitational collapse of the proto-star envelope. This process (known as ambipolar diffusion) depends on the ionisation degree, which can be derived from the \\hco abundance. We present a study of \\hco and its isotopologues (H$^{13}$CO$^+$, HC$^{18}$O$^+$, DCO$^+$, and H$^{13}$CO$^+$) in the low-mass proto-star IRAS16293$-$2422. The structure of this object is complex, and the HCO$^+$ emission ar","authors_text":"D. Qu\\'enard, E. Caux, S. Bottinelli, V. Wakelam","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-20T13:05:40Z","title":"3D modelling of HCO$^+$ and its isotopologues in the low-mass proto-star IRAS16293$-$2422"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.07590","kind":"arxiv","version":1},"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:d5cfce1fe680ee4731940eb25aa476e9688c913413ec248efaf17d94f9a8c893","target":"record","created_at":"2026-05-18T00:17:02Z","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":"d52e83ccc14f0ff83329db4a0c317520de555e4ec7d2aaddddfd69f637acf57f","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-20T13:05:40Z","title_canon_sha256":"7304ddae279f45d0e04ffd2eede50dc9393d653e10af958dc4990f62269ee8e0"},"schema_version":"1.0","source":{"id":"1804.07590","kind":"arxiv","version":1}},"canonical_sha256":"b0fe53d7a96edc673e86bf9b850c1eb7da3bf85b530893e29abb1bf7fd50269f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0fe53d7a96edc673e86bf9b850c1eb7da3bf85b530893e29abb1bf7fd50269f","first_computed_at":"2026-05-18T00:17:02.921207Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:02.921207Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7KEkY8CokHDtq8EzR1OUEImFuGeY5ROljtbEgMEm4ZWsFth1bXR60g8LU8aEWEmrMlSn0Ck/PmUKFHbTdFHpCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:02.921830Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.07590","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5cfce1fe680ee4731940eb25aa476e9688c913413ec248efaf17d94f9a8c893","sha256:fa9b99914fcede6b2a49e55f0c216ef1bb78d6663107f306ea271e85596624b9"],"state_sha256":"9bb8954172cfdbcda1af61e4a622f84210a60724180bfb0f7a7061eb55c0eca8"}