{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IFXXK7T52E4ATT7PZKBD3ECLYZ","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":"0c058ac41fb5c22a7125087301570217ae9b3f165375f2ed29a357c531698ac5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-07T20:00:02Z","title_canon_sha256":"35bc8bc93651e7cb246a69319d08e2ed1586e128fb42a31e9ae46647818e56ee"},"schema_version":"1.0","source":{"id":"1104.1426","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.1426","created_at":"2026-05-18T02:02:36Z"},{"alias_kind":"arxiv_version","alias_value":"1104.1426v1","created_at":"2026-05-18T02:02:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.1426","created_at":"2026-05-18T02:02:36Z"},{"alias_kind":"pith_short_12","alias_value":"IFXXK7T52E4A","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"IFXXK7T52E4ATT7P","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"IFXXK7T5","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:efa834ae91be8a19c1957de60765123e7b745587135de88c070e9b3004a8de9d","target":"graph","created_at":"2026-05-18T02:02:36Z","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":"Recent work has shown that the star formation-density relation -- in which galaxies with low star formation rates are preferentially found in dense environments -- is still in place at z~1, but the situation becomes less clear at higher redshifts. We use mass-selected samples drawn from the UKIDSS Ultra-Deep Survey to show that galaxies with quenched star formation tend to reside in dense environments out to at least z~1.8. Over most of this redshift range we are able to demonstrate that this star formation-density relation holds even at fixed stellar mass. The environmental quenching of star ","authors_text":"Hendrik Hildebrandt, Marijn Franx, Rik J. Williams, Ryan F. Quadri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-07T20:00:02Z","title":"Tracing the Star Formation-Density Relation to z~2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.1426","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":"sha256:9204dba106f2d167863c7a5baa9cf1c75bf18bc214b8e64dc684f108d541d2ff","target":"record","created_at":"2026-05-18T02:02:36Z","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":"0c058ac41fb5c22a7125087301570217ae9b3f165375f2ed29a357c531698ac5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-07T20:00:02Z","title_canon_sha256":"35bc8bc93651e7cb246a69319d08e2ed1586e128fb42a31e9ae46647818e56ee"},"schema_version":"1.0","source":{"id":"1104.1426","kind":"arxiv","version":1}},"canonical_sha256":"416f757e7dd13809cfefca823d904bc6465236e6687a72d10e5e0079c09185c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"416f757e7dd13809cfefca823d904bc6465236e6687a72d10e5e0079c09185c5","first_computed_at":"2026-05-18T02:02:36.575060Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:36.575060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"My3FugczoXFfA2l1UBYBSFQdQcnsntgm8zgOmrqRdQSHs3bHRcuzalfFORdInPB0kA3NsFhlJ+zjAtBCJ7RhBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:36.575768Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.1426","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9204dba106f2d167863c7a5baa9cf1c75bf18bc214b8e64dc684f108d541d2ff","sha256:efa834ae91be8a19c1957de60765123e7b745587135de88c070e9b3004a8de9d"],"state_sha256":"39c2a61511219fedec90ae165d9ae69d68625c2a7d3fab1934cda1ed6518a9dc"}