{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:RF7LRQE3VZUU2AX2FTEUM732P2","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":"df3a03e4b2f18b8c10ac80f58a70c1dd38b39e22ac7538cd9f087676fddc467c","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-17T13:20:29Z","title_canon_sha256":"546304f708cafb38e5fc639c4e087dd68886768f71720a44484c0de825f9f571"},"schema_version":"1.0","source":{"id":"2010.08786","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.08786","created_at":"2026-07-05T01:47:09Z"},{"alias_kind":"arxiv_version","alias_value":"2010.08786v1","created_at":"2026-07-05T01:47:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.08786","created_at":"2026-07-05T01:47:09Z"},{"alias_kind":"pith_short_12","alias_value":"RF7LRQE3VZUU","created_at":"2026-07-05T01:47:09Z"},{"alias_kind":"pith_short_16","alias_value":"RF7LRQE3VZUU2AX2","created_at":"2026-07-05T01:47:09Z"},{"alias_kind":"pith_short_8","alias_value":"RF7LRQE3","created_at":"2026-07-05T01:47:09Z"}],"graph_snapshots":[{"event_id":"sha256:42083fe03beba4b9b1f289754ee6769a73897b943dc73a5c92d52ba79286c57f","target":"graph","created_at":"2026-07-05T01:47:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2010.08786/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Predicting the merger timescale ($\\tau_{\\rm merge}$) of merging dark matter halos, based on their orbital parameters and the structural properties of their hosts, is a fundamental problem in gravitational dynamics that has important consequences for our understanding of cosmological structure formation and galaxy formation. Previous models predicting $\\tau_{\\rm merge}$ have shown varying degrees of success when compared to the results of cosmological $N$-body simulations. We build on this previous work and propose a new model for $\\tau_{\\rm merge}$ that draws on insights derived from these sim","authors_text":"Aaron S. G. Robotham, Chris Power, Claudia del P. Lagos, Pascal J. Elahi, Rhys J. J. Poulton","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-17T13:20:29Z","title":"Extracting Galaxy Merger Timescales II: A new fitting formula"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.08786","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":"sha256:5bfb790b9b0f712f040a33084ba671affef5e3ff1abf780a15af08ed3bda4555","target":"record","created_at":"2026-07-05T01:47:09Z","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":"df3a03e4b2f18b8c10ac80f58a70c1dd38b39e22ac7538cd9f087676fddc467c","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-10-17T13:20:29Z","title_canon_sha256":"546304f708cafb38e5fc639c4e087dd68886768f71720a44484c0de825f9f571"},"schema_version":"1.0","source":{"id":"2010.08786","kind":"arxiv","version":1}},"canonical_sha256":"897eb8c09bae694d02fa2cc9467f7a7eb764c8152321471db465108b8471c350","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"897eb8c09bae694d02fa2cc9467f7a7eb764c8152321471db465108b8471c350","first_computed_at":"2026-07-05T01:47:09.736089Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:47:09.736089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mSlKK/BBZ+NROc1imOEc0aP8nVye5MBBUgPhXrUaZlGq+MaN+AG8iW/g+vDbzQUL0WRRlsWn0ibdP2ZpitJ7Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:47:09.736586Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.08786","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bfb790b9b0f712f040a33084ba671affef5e3ff1abf780a15af08ed3bda4555","sha256:42083fe03beba4b9b1f289754ee6769a73897b943dc73a5c92d52ba79286c57f"],"state_sha256":"d93da83576813cf9499bdb4fe6e2a73e67721421e594dba8de00571416bac887"}