{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DE7T6GSL7LOUTGYDJJJQHOJKLE","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":"f56d1d82d88627d100931ac842d1af17bf976589f8920fdd997f60c206d72086","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-07T21:00:00Z","title_canon_sha256":"526fc7195bb5800b9ff09af4b856ad23ca64aa9c78ac386d74a26b48992327de"},"schema_version":"1.0","source":{"id":"1311.1816","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.1816","created_at":"2026-05-18T02:47:23Z"},{"alias_kind":"arxiv_version","alias_value":"1311.1816v1","created_at":"2026-05-18T02:47:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.1816","created_at":"2026-05-18T02:47:23Z"},{"alias_kind":"pith_short_12","alias_value":"DE7T6GSL7LOU","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DE7T6GSL7LOUTGYD","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DE7T6GSL","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:e47e2498c4c4858177372302219c7b37e57f9997a1b2ceb74324314fcf0ff5a7","target":"graph","created_at":"2026-05-18T02:47:23Z","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 explore the dependence of the galaxy mass-metallicity relation on environment in SDSS, in terms of both over-density and central/satellite dichotomy. We find that at a given stellar mass, there is a strong dependence of metallicity on over-density for star-forming satellites. Instead, for star-forming centrals no correlation is found. Star-forming satellites at different stellar masses form a tight sequence in the average overdensity - metallicity plane, which covers the entire observed range of metallicities and stellar masses. This remarkable result appears to imply that there exists a un","authors_text":"Roberto Maiolino, Yingjie Peng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-07T21:00:00Z","title":"The dependence of the galaxy mass-metallicity relation on environment and the implied metallicity of the IGM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.1816","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:ba75a9fb424318a075a80ef48d8c72da6d8d72c8d13c32df0f293fd2bac40199","target":"record","created_at":"2026-05-18T02:47:23Z","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":"f56d1d82d88627d100931ac842d1af17bf976589f8920fdd997f60c206d72086","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-11-07T21:00:00Z","title_canon_sha256":"526fc7195bb5800b9ff09af4b856ad23ca64aa9c78ac386d74a26b48992327de"},"schema_version":"1.0","source":{"id":"1311.1816","kind":"arxiv","version":1}},"canonical_sha256":"193f3f1a4bfadd499b034a5303b92a593454bdf71a4d842be8a5aeef2e3d02a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"193f3f1a4bfadd499b034a5303b92a593454bdf71a4d842be8a5aeef2e3d02a0","first_computed_at":"2026-05-18T02:47:23.107776Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:47:23.107776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qjLABknwEQM0Nl/6dj4MytT2DuBoT+BbKe713CcGAWeWPk+WbtHwHqDHiz29aOs/qpqJY3q0tdefr48wsZ0yDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:47:23.108465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.1816","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba75a9fb424318a075a80ef48d8c72da6d8d72c8d13c32df0f293fd2bac40199","sha256:e47e2498c4c4858177372302219c7b37e57f9997a1b2ceb74324314fcf0ff5a7"],"state_sha256":"f78eacf7fd78fb4b37fa6cb81932f05b01a1d4817a956f7109ece75f080babf5"}