{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NNNIBFOY7OXWFDGCOB6CWO4D2I","short_pith_number":"pith:NNNIBFOY","canonical_record":{"source":{"id":"1704.07697","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-25T13:55:09Z","cross_cats_sorted":[],"title_canon_sha256":"a06e0b634ce26c1a741b632a3ea72cc11166ecd113cc15b2d0e6754a3279a844","abstract_canon_sha256":"5f2184e290c476cd323775cffdd7359e5dfac7fcff15003a23dc9c06f0f754aa"},"schema_version":"1.0"},"canonical_sha256":"6b5a8095d8fbaf628cc2707c2b3b83d22e3183c5959d6eecf6deb299ba97a9d0","source":{"kind":"arxiv","id":"1704.07697","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07697","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07697v1","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07697","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"NNNIBFOY7OXW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NNNIBFOY7OXWFDGC","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NNNIBFOY","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NNNIBFOY7OXWFDGCOB6CWO4D2I","target":"record","payload":{"canonical_record":{"source":{"id":"1704.07697","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-25T13:55:09Z","cross_cats_sorted":[],"title_canon_sha256":"a06e0b634ce26c1a741b632a3ea72cc11166ecd113cc15b2d0e6754a3279a844","abstract_canon_sha256":"5f2184e290c476cd323775cffdd7359e5dfac7fcff15003a23dc9c06f0f754aa"},"schema_version":"1.0"},"canonical_sha256":"6b5a8095d8fbaf628cc2707c2b3b83d22e3183c5959d6eecf6deb299ba97a9d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:03.902538Z","signature_b64":"QroiISBq52/Jo59eW2ZedeIej+9mtB4Sq8PUoj9B+rxS+HYN8I1URpSRTsyE9O7MxkcEMSwD3iC8AYYKFTFQDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b5a8095d8fbaf628cc2707c2b3b83d22e3183c5959d6eecf6deb299ba97a9d0","last_reissued_at":"2026-05-18T00:40:03.902074Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:03.902074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.07697","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R9UbcNRcYOgAA2Dmif/4dQfFmzRHO+zwxYkl3hk3CXq0ZpVHEX968CP6bqTkryfsRGGFOqT6qEkl7uKh/pvcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:56:58.437495Z"},"content_sha256":"7080965bcdc0b13709104dd071b13c62251e90fc4fbfcc3877d2ff112892057d","schema_version":"1.0","event_id":"sha256:7080965bcdc0b13709104dd071b13c62251e90fc4fbfcc3877d2ff112892057d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NNNIBFOY7OXWFDGCOB6CWO4D2I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The role of environment on the star formation history of disc galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Fenghui Zhang, Ruixiang Chang, Xiaoyu Kang","submitted_at":"2017-04-25T13:55:09Z","abstract_excerpt":"NGC\\,2403, NGC\\,300 and M33 are three nearby pure-disc galaxies with similar stellar mass in different environments, they are benchmarks for understanding late-type spiral galaxies in different environments. The chemical evolution and growth of their discs are investigated by using the simple chemical evolution model, in which their discs are assumed to originate and grow through the accretion of the primordial gas, and the gas outflow process is also taken into account. Through comparative study of the best-fitting model predicted star formation histories for them, we hope to derive a picture"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07697","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/np4f5fqPOlf/iJH5bu3/L5RSchhxKZfV86QFwdnafPxsx74PsW4dknRdplUolYzx6Fv1y9IkmSzzHydAJlGDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:56:58.437836Z"},"content_sha256":"cef9b7a00394697baad6e642d92eb52fd4ed06207dda06f7491fc15a39d0ae4f","schema_version":"1.0","event_id":"sha256:cef9b7a00394697baad6e642d92eb52fd4ed06207dda06f7491fc15a39d0ae4f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/bundle.json","state_url":"https://pith.science/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-19T01:56:58Z","links":{"resolver":"https://pith.science/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I","bundle":"https://pith.science/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/bundle.json","state":"https://pith.science/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NNNIBFOY7OXWFDGCOB6CWO4D2I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NNNIBFOY7OXWFDGCOB6CWO4D2I","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":"5f2184e290c476cd323775cffdd7359e5dfac7fcff15003a23dc9c06f0f754aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-25T13:55:09Z","title_canon_sha256":"a06e0b634ce26c1a741b632a3ea72cc11166ecd113cc15b2d0e6754a3279a844"},"schema_version":"1.0","source":{"id":"1704.07697","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07697","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07697v1","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07697","created_at":"2026-05-18T00:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"NNNIBFOY7OXW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NNNIBFOY7OXWFDGC","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NNNIBFOY","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:cef9b7a00394697baad6e642d92eb52fd4ed06207dda06f7491fc15a39d0ae4f","target":"graph","created_at":"2026-05-18T00:40:03Z","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":"NGC\\,2403, NGC\\,300 and M33 are three nearby pure-disc galaxies with similar stellar mass in different environments, they are benchmarks for understanding late-type spiral galaxies in different environments. The chemical evolution and growth of their discs are investigated by using the simple chemical evolution model, in which their discs are assumed to originate and grow through the accretion of the primordial gas, and the gas outflow process is also taken into account. Through comparative study of the best-fitting model predicted star formation histories for them, we hope to derive a picture","authors_text":"Fenghui Zhang, Ruixiang Chang, Xiaoyu Kang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-25T13:55:09Z","title":"The role of environment on the star formation history of disc galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07697","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":"sha256:7080965bcdc0b13709104dd071b13c62251e90fc4fbfcc3877d2ff112892057d","target":"record","created_at":"2026-05-18T00:40:03Z","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":"5f2184e290c476cd323775cffdd7359e5dfac7fcff15003a23dc9c06f0f754aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-25T13:55:09Z","title_canon_sha256":"a06e0b634ce26c1a741b632a3ea72cc11166ecd113cc15b2d0e6754a3279a844"},"schema_version":"1.0","source":{"id":"1704.07697","kind":"arxiv","version":1}},"canonical_sha256":"6b5a8095d8fbaf628cc2707c2b3b83d22e3183c5959d6eecf6deb299ba97a9d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b5a8095d8fbaf628cc2707c2b3b83d22e3183c5959d6eecf6deb299ba97a9d0","first_computed_at":"2026-05-18T00:40:03.902074Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:03.902074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QroiISBq52/Jo59eW2ZedeIej+9mtB4Sq8PUoj9B+rxS+HYN8I1URpSRTsyE9O7MxkcEMSwD3iC8AYYKFTFQDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:03.902538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07697","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7080965bcdc0b13709104dd071b13c62251e90fc4fbfcc3877d2ff112892057d","sha256:cef9b7a00394697baad6e642d92eb52fd4ed06207dda06f7491fc15a39d0ae4f"],"state_sha256":"8b2417aaf0922e0cdea0a9344848379ce9cb17d8e39f18dfb786dcb84051ad81"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3VJPlW1zl69fdcbeWK7VaAplaj997CEXSuaDpQDwsVepQd2rLudaMSOoETaclVmwyMCaqlUHr3bqRnhBD6S5Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T01:56:58.438956Z","bundle_sha256":"99f0553601444e620878ce1f39153d5fc75c09c3dd4f9739263b06463bd6a587"}}