{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2DWA5Z7Q47LUP5DJYAYXGNM2VJ","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":"a11efc6dc47e82ef67341c4c1072106694ffff4d96ad74acb5668975ad8a66e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T04:26:08Z","title_canon_sha256":"75349a6d6e3f82e9abf0767b591ceee219eb2287df21e5c0cf63013baa86d963"},"schema_version":"1.0","source":{"id":"1803.07745","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07745","created_at":"2026-05-18T00:19:20Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07745v1","created_at":"2026-05-18T00:19:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07745","created_at":"2026-05-18T00:19:20Z"},{"alias_kind":"pith_short_12","alias_value":"2DWA5Z7Q47LU","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"2DWA5Z7Q47LUP5DJ","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"2DWA5Z7Q","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:3301ce83d25ea976ff115afab40d3f22f3f0161cdd2f7bee70cede283d72d58d","target":"graph","created_at":"2026-05-18T00:19:20Z","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":"We present hydrodynamical N-body models which demonstrate that elliptical galaxies can transform into S0s by acquiring a disc. In particular, we show that the merger with a massive gas-rich satellite can lead to the formation of a baryonic disc around an elliptical. We model the elliptical as a massive, compact galaxy which could be observed as a 'red nugget' in the high-z universe. This scenario contrasts with existing S0 formation scenarios in the literature in two important ways. First, the progenitor is an elliptical galaxy whereas scenarios in the literature typically assume a spiral prog","authors_text":"Duncan A. Forbes, J.D. Diaz, Kenji Bekki, Michael J. Drinkwater, Simon Deeley, Warrick J. Couch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T04:26:08Z","title":"Formation of S0s via disc accretion around high-redshift compact ellipticals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07745","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":"sha256:1ebe64ec06e34f3193d34c832ea1201b7443c4f7314e20e36fccea41876195b6","target":"record","created_at":"2026-05-18T00:19:20Z","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":"a11efc6dc47e82ef67341c4c1072106694ffff4d96ad74acb5668975ad8a66e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T04:26:08Z","title_canon_sha256":"75349a6d6e3f82e9abf0767b591ceee219eb2287df21e5c0cf63013baa86d963"},"schema_version":"1.0","source":{"id":"1803.07745","kind":"arxiv","version":1}},"canonical_sha256":"d0ec0ee7f0e7d747f469c03173359aaa4a58912af37349a52ae180c8dc99ec04","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0ec0ee7f0e7d747f469c03173359aaa4a58912af37349a52ae180c8dc99ec04","first_computed_at":"2026-05-18T00:19:20.182126Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:20.182126Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iqPr0sNbxKzYu4Eu6SWuhq8Vxdp7ZzadcEDhNH4wWfSGKa8rHgUuDRnMu73wBmqZvDtTV7C1DOHpI4CAYVtyAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:20.182646Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07745","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ebe64ec06e34f3193d34c832ea1201b7443c4f7314e20e36fccea41876195b6","sha256:3301ce83d25ea976ff115afab40d3f22f3f0161cdd2f7bee70cede283d72d58d"],"state_sha256":"8295507d5d279dd2bd97380f85b0f3255d700f952e0fc8f822ca2ae2b894ad21"}