{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:5YTO3N5RNBZ47KHISKNRQGEWD3","short_pith_number":"pith:5YTO3N5R","canonical_record":{"source":{"id":"1704.07382","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"bf2ea6ddf9ab48d446c646ffdc46f7e09bc5676d5fd6e4221c21c7a153162f38","abstract_canon_sha256":"b836773c5c62aaa9bd7adfd10882487cffd7cf1f18696fcd2fdfd539a47fcad9"},"schema_version":"1.0"},"canonical_sha256":"ee26edb7b16873cfa8e8929b1818961effcf6a2765fca8399f2854f12d0637d5","source":{"kind":"arxiv","id":"1704.07382","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07382","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07382v2","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07382","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"pith_short_12","alias_value":"5YTO3N5RNBZ4","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"5YTO3N5RNBZ47KHI","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"5YTO3N5R","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:5YTO3N5RNBZ47KHISKNRQGEWD3","target":"record","payload":{"canonical_record":{"source":{"id":"1704.07382","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"bf2ea6ddf9ab48d446c646ffdc46f7e09bc5676d5fd6e4221c21c7a153162f38","abstract_canon_sha256":"b836773c5c62aaa9bd7adfd10882487cffd7cf1f18696fcd2fdfd539a47fcad9"},"schema_version":"1.0"},"canonical_sha256":"ee26edb7b16873cfa8e8929b1818961effcf6a2765fca8399f2854f12d0637d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:33.447929Z","signature_b64":"Td/TvkAGgxo4g0nb8HH32iyFAnq2Gs2mdFa8nTu4TN4pHHapimUdaAeXUb2HIyJaWrJvk6vBMOYyOjE83k8kBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee26edb7b16873cfa8e8929b1818961effcf6a2765fca8399f2854f12d0637d5","last_reissued_at":"2026-05-18T00:41:33.447296Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:33.447296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.07382","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:41:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0Cg48XhFVNpecErYk3aThWaci+R9ZNnHOvKWTeb3nCmafZ3ZaE+A+4x2ZJTIof1WRhd4wLuo2ZvXOeFdSKwTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:17:34.481142Z"},"content_sha256":"17fb2d42451a1690eea56c29bd6679af0a2079e0f8e72ec10d1b4b458000e53d","schema_version":"1.0","event_id":"sha256:17fb2d42451a1690eea56c29bd6679af0a2079e0f8e72ec10d1b4b458000e53d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:5YTO3N5RNBZ47KHISKNRQGEWD3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Yonsei evolutionary population synthesis (YEPS). II. Spectro-photometric evolution of helium-enhanced stellar populations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chul Chung, Suk-Jin Yoon, Young-Wook Lee","submitted_at":"2017-04-24T18:00:01Z","abstract_excerpt":"The discovery of multiple stellar populations in Milky Way globular clusters (GCs) has stimulated various follow-up studies on helium-enhanced stellar populations. Here we present the evolutionary population synthesis models for the spectro-photometric evolution of simple stellar populations (SSPs) with varying initial helium abundance ($Y_{\\rm ini}$). We show that $Y_{\\rm ini}$ brings about {dramatic} changes in spectro-photometric properties of SSPs. Like the normal-helium SSPs, the integrated spectro-photometric evolution of helium-enhanced SSPs is also dependent on metallicity and age for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07382","kind":"arxiv","version":2},"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":"2026-05-18T00:41:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+R3QneULbnGuP+qNr+TQXGRnBxqxyNnS7c8EbaAFeEfQfXG4cFK9a3krte1yFMJM73GBQAPDWuxwXDPmhjUAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:17:34.481796Z"},"content_sha256":"db7ffba2847998fd9d541e816ba614beb006f038ccb3ce059b1ba366eb61469b","schema_version":"1.0","event_id":"sha256:db7ffba2847998fd9d541e816ba614beb006f038ccb3ce059b1ba366eb61469b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/bundle.json","state_url":"https://pith.science/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/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":"2026-05-26T18:17:34Z","links":{"resolver":"https://pith.science/pith/5YTO3N5RNBZ47KHISKNRQGEWD3","bundle":"https://pith.science/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/bundle.json","state":"https://pith.science/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5YTO3N5RNBZ47KHISKNRQGEWD3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:5YTO3N5RNBZ47KHISKNRQGEWD3","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":"b836773c5c62aaa9bd7adfd10882487cffd7cf1f18696fcd2fdfd539a47fcad9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T18:00:01Z","title_canon_sha256":"bf2ea6ddf9ab48d446c646ffdc46f7e09bc5676d5fd6e4221c21c7a153162f38"},"schema_version":"1.0","source":{"id":"1704.07382","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07382","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07382v2","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07382","created_at":"2026-05-18T00:41:33Z"},{"alias_kind":"pith_short_12","alias_value":"5YTO3N5RNBZ4","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"5YTO3N5RNBZ47KHI","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"5YTO3N5R","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:db7ffba2847998fd9d541e816ba614beb006f038ccb3ce059b1ba366eb61469b","target":"graph","created_at":"2026-05-18T00:41:33Z","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":"The discovery of multiple stellar populations in Milky Way globular clusters (GCs) has stimulated various follow-up studies on helium-enhanced stellar populations. Here we present the evolutionary population synthesis models for the spectro-photometric evolution of simple stellar populations (SSPs) with varying initial helium abundance ($Y_{\\rm ini}$). We show that $Y_{\\rm ini}$ brings about {dramatic} changes in spectro-photometric properties of SSPs. Like the normal-helium SSPs, the integrated spectro-photometric evolution of helium-enhanced SSPs is also dependent on metallicity and age for ","authors_text":"Chul Chung, Suk-Jin Yoon, Young-Wook Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T18:00:01Z","title":"Yonsei evolutionary population synthesis (YEPS). II. Spectro-photometric evolution of helium-enhanced stellar populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07382","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":"sha256:17fb2d42451a1690eea56c29bd6679af0a2079e0f8e72ec10d1b4b458000e53d","target":"record","created_at":"2026-05-18T00:41:33Z","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":"b836773c5c62aaa9bd7adfd10882487cffd7cf1f18696fcd2fdfd539a47fcad9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T18:00:01Z","title_canon_sha256":"bf2ea6ddf9ab48d446c646ffdc46f7e09bc5676d5fd6e4221c21c7a153162f38"},"schema_version":"1.0","source":{"id":"1704.07382","kind":"arxiv","version":2}},"canonical_sha256":"ee26edb7b16873cfa8e8929b1818961effcf6a2765fca8399f2854f12d0637d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee26edb7b16873cfa8e8929b1818961effcf6a2765fca8399f2854f12d0637d5","first_computed_at":"2026-05-18T00:41:33.447296Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:33.447296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Td/TvkAGgxo4g0nb8HH32iyFAnq2Gs2mdFa8nTu4TN4pHHapimUdaAeXUb2HIyJaWrJvk6vBMOYyOjE83k8kBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:33.447929Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07382","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17fb2d42451a1690eea56c29bd6679af0a2079e0f8e72ec10d1b4b458000e53d","sha256:db7ffba2847998fd9d541e816ba614beb006f038ccb3ce059b1ba366eb61469b"],"state_sha256":"1e3fcd040c6c6f57bb1d178dd04c2b85dd2fd9ae7ecbc6fb9564561a96937c3e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u0T+I+c847tYM6mn/aZqvLWkwBdDdGM+MtuwOt+veLFNn1RbkuzPNvCh1UWxDelbakBUM3jHJhykScdCZ9m5Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:17:34.484771Z","bundle_sha256":"66551b732bfb68a27f9ec213225b665a69efae18915032d0a20aa6a09000c8a0"}}