{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XSSDLIG5XZPWBWAYZIRCBEF65W","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":"13b5ad3c1bef991036c0997c3b9e1f64714a09bf96ee6677a6c1ef12e4ab3040","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-03T18:00:00Z","title_canon_sha256":"e1e3a89676cc0ca83885ab02e179d54e7e8faf8be38458aedbb8a872c38f62e4"},"schema_version":"1.0","source":{"id":"1909.01347","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.01347","created_at":"2026-07-05T01:13:54Z"},{"alias_kind":"arxiv_version","alias_value":"1909.01347v2","created_at":"2026-07-05T01:13:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.01347","created_at":"2026-07-05T01:13:54Z"},{"alias_kind":"pith_short_12","alias_value":"XSSDLIG5XZPW","created_at":"2026-07-05T01:13:54Z"},{"alias_kind":"pith_short_16","alias_value":"XSSDLIG5XZPWBWAY","created_at":"2026-07-05T01:13:54Z"},{"alias_kind":"pith_short_8","alias_value":"XSSDLIG5","created_at":"2026-07-05T01:13:54Z"}],"graph_snapshots":[{"event_id":"sha256:6a3f1867d28b61aaa352aeeab21e31aef25afe0ffc12fdfc8cd599df30693971","target":"graph","created_at":"2026-07-05T01:13:54Z","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/1909.01347/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use the IllustrisTNG cosmological hydrodynamical simulation to study the formation of ultra-diffuse galaxies (UDGs) in galaxy clusters. We supplement the simulations with a realistic mass-size relation for galaxies at the time of infall into the cluster, as well as an analytical model to describe the tidally-induced evolution of their stellar mass, velocity dispersion and size. The model assumes \"cuspy\" NFW halos and, contrary to recent claims, has no difficulty reproducing the observed number of UDGs in clusters. Our results further suggest that the UDG population consists of a mixture of ","authors_text":"Eric W. Peng, Julio F. Navarro, Lars Hernquist, Laura V. Sales, Louis Penafiel, Sungsoon Lim","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-03T18:00:00Z","title":"The Formation of Ultra-Diffuse Galaxies in Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.01347","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":"sha256:2c59b55c79a58b7db182b686169f851fd93c92a48ed4ec5703325d568c734867","target":"record","created_at":"2026-07-05T01:13:54Z","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":"13b5ad3c1bef991036c0997c3b9e1f64714a09bf96ee6677a6c1ef12e4ab3040","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-03T18:00:00Z","title_canon_sha256":"e1e3a89676cc0ca83885ab02e179d54e7e8faf8be38458aedbb8a872c38f62e4"},"schema_version":"1.0","source":{"id":"1909.01347","kind":"arxiv","version":2}},"canonical_sha256":"bca435a0ddbe5f60d818ca222090beed8a8953b78464666e35026e9d50d52b1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bca435a0ddbe5f60d818ca222090beed8a8953b78464666e35026e9d50d52b1d","first_computed_at":"2026-07-05T01:13:54.510039Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:13:54.510039Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VvOafrMqRhnaOPIcU6h/mKVTb1/jaaxlEKL+QOMRgzUuij7FG4fTkFQQl8yXS1CT215poRWzR107wcUzDGi2Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:13:54.510630Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.01347","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c59b55c79a58b7db182b686169f851fd93c92a48ed4ec5703325d568c734867","sha256:6a3f1867d28b61aaa352aeeab21e31aef25afe0ffc12fdfc8cd599df30693971"],"state_sha256":"c4cd97b92443d4db9a80619ba5ea655fba0530cb23872bb9f4b77a41b3e34497"}