{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:3Q4HR3IP6TTFONVPBOBF7RAITP","short_pith_number":"pith:3Q4HR3IP","canonical_record":{"source":{"id":"0903.3962","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T21:02:09Z","cross_cats_sorted":[],"title_canon_sha256":"ce14469b5ac50c4b6aa471bd50f393306d369f643b27c6d6f70efcb76c0da7e7","abstract_canon_sha256":"d724fbf686a9345e9979e7d50f7e37d878e2dd1ae3a53c9bb0e277e4a1fb0ec0"},"schema_version":"1.0"},"canonical_sha256":"dc3878ed0ff4e65736af0b825fc4089bcf58c3cdbf1e47f15612fca6aa89155a","source":{"kind":"arxiv","id":"0903.3962","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.3962","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"arxiv_version","alias_value":"0903.3962v4","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.3962","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"pith_short_12","alias_value":"3Q4HR3IP6TTF","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3Q4HR3IP6TTFONVP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3Q4HR3IP","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:3Q4HR3IP6TTFONVPBOBF7RAITP","target":"record","payload":{"canonical_record":{"source":{"id":"0903.3962","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T21:02:09Z","cross_cats_sorted":[],"title_canon_sha256":"ce14469b5ac50c4b6aa471bd50f393306d369f643b27c6d6f70efcb76c0da7e7","abstract_canon_sha256":"d724fbf686a9345e9979e7d50f7e37d878e2dd1ae3a53c9bb0e277e4a1fb0ec0"},"schema_version":"1.0"},"canonical_sha256":"dc3878ed0ff4e65736af0b825fc4089bcf58c3cdbf1e47f15612fca6aa89155a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:26.396840Z","signature_b64":"1P7+zU515/C41mDunQCXSc9naVx0fHuVk8ypSC08FT19l3hHVTQ/ZW4IY2C/A+SMd5U15CArSJZ5d8aVoWs2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc3878ed0ff4e65736af0b825fc4089bcf58c3cdbf1e47f15612fca6aa89155a","last_reissued_at":"2026-05-18T02:14:26.396237Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:26.396237Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.3962","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:14:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GsNvBsbI6Z4CU/Q2PPmlPHHmaH2ucf5MnMDVpXAnT8SaKxYxmx6vMO0ziIBkbBYGC0VDM2GCFBDmqd774DZIBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:17:23.232980Z"},"content_sha256":"a92a23e44c9a8809320f6f18a55d615c1698fe4516b7e34fcebc3947c98a9fce","schema_version":"1.0","event_id":"sha256:a92a23e44c9a8809320f6f18a55d615c1698fe4516b7e34fcebc3947c98a9fce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:3Q4HR3IP6TTFONVPBOBF7RAITP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Hubble sequence: just a vestige of merger events?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"((1) GEPI Observatoire de Paris Meudon (2) LAM Observatoire Astronomique de Marseille), E. Athanassoula (2), F. Hammer (1), H. Flores (1), M. Puech (1), M. Rodrigues (1), R. Delgado-Serrano (1), Y. Yang (1)","submitted_at":"2009-03-23T21:02:09Z","abstract_excerpt":"Abr: We investigate whether the Hubble sequence can be reproduced by the relics of merger events. We verify that, at zmed=0.65, the abundant population of anomalous starbursts is mainly linked to the local spirals. Their morphologies are dominated by young stars and are related to their ionised-gas kinematics. We show that both morphologies and kinematics can be reproduced by using gas modelling from Barnes' (2002) study of major mergers. Using our modelling to estimate the gas-to-stars transformation during a merger, we identify the gas fraction in the progenitors to be generally above 50%. A"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.3962","kind":"arxiv","version":4},"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":"2026-05-18T02:14:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uHjsc6wGf6qpyp/kxjwgL8GVZIWmo3fvOqAQBdSipj9B2HFTB62VqKfNCWwaOemjqDgw3E7g6CM3ioaFNy2lBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:17:23.233753Z"},"content_sha256":"83ff31ea9a3034e29042ea8b3db36a140036572aea156b3626072ac62df93179","schema_version":"1.0","event_id":"sha256:83ff31ea9a3034e29042ea8b3db36a140036572aea156b3626072ac62df93179"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/bundle.json","state_url":"https://pith.science/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/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":"2026-05-26T13:17:23Z","links":{"resolver":"https://pith.science/pith/3Q4HR3IP6TTFONVPBOBF7RAITP","bundle":"https://pith.science/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/bundle.json","state":"https://pith.science/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3Q4HR3IP6TTFONVPBOBF7RAITP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:3Q4HR3IP6TTFONVPBOBF7RAITP","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":"d724fbf686a9345e9979e7d50f7e37d878e2dd1ae3a53c9bb0e277e4a1fb0ec0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T21:02:09Z","title_canon_sha256":"ce14469b5ac50c4b6aa471bd50f393306d369f643b27c6d6f70efcb76c0da7e7"},"schema_version":"1.0","source":{"id":"0903.3962","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.3962","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"arxiv_version","alias_value":"0903.3962v4","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.3962","created_at":"2026-05-18T02:14:26Z"},{"alias_kind":"pith_short_12","alias_value":"3Q4HR3IP6TTF","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3Q4HR3IP6TTFONVP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3Q4HR3IP","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:83ff31ea9a3034e29042ea8b3db36a140036572aea156b3626072ac62df93179","target":"graph","created_at":"2026-05-18T02:14:26Z","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":"Abr: We investigate whether the Hubble sequence can be reproduced by the relics of merger events. We verify that, at zmed=0.65, the abundant population of anomalous starbursts is mainly linked to the local spirals. Their morphologies are dominated by young stars and are related to their ionised-gas kinematics. We show that both morphologies and kinematics can be reproduced by using gas modelling from Barnes' (2002) study of major mergers. Using our modelling to estimate the gas-to-stars transformation during a merger, we identify the gas fraction in the progenitors to be generally above 50%. A","authors_text":"((1) GEPI Observatoire de Paris Meudon (2) LAM Observatoire Astronomique de Marseille), E. Athanassoula (2), F. Hammer (1), H. Flores (1), M. Puech (1), M. Rodrigues (1), R. Delgado-Serrano (1), Y. Yang (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T21:02:09Z","title":"The Hubble sequence: just a vestige of merger events?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.3962","kind":"arxiv","version":4},"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:a92a23e44c9a8809320f6f18a55d615c1698fe4516b7e34fcebc3947c98a9fce","target":"record","created_at":"2026-05-18T02:14:26Z","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":"d724fbf686a9345e9979e7d50f7e37d878e2dd1ae3a53c9bb0e277e4a1fb0ec0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T21:02:09Z","title_canon_sha256":"ce14469b5ac50c4b6aa471bd50f393306d369f643b27c6d6f70efcb76c0da7e7"},"schema_version":"1.0","source":{"id":"0903.3962","kind":"arxiv","version":4}},"canonical_sha256":"dc3878ed0ff4e65736af0b825fc4089bcf58c3cdbf1e47f15612fca6aa89155a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc3878ed0ff4e65736af0b825fc4089bcf58c3cdbf1e47f15612fca6aa89155a","first_computed_at":"2026-05-18T02:14:26.396237Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:26.396237Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1P7+zU515/C41mDunQCXSc9naVx0fHuVk8ypSC08FT19l3hHVTQ/ZW4IY2C/A+SMd5U15CArSJZ5d8aVoWs2AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:26.396840Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.3962","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a92a23e44c9a8809320f6f18a55d615c1698fe4516b7e34fcebc3947c98a9fce","sha256:83ff31ea9a3034e29042ea8b3db36a140036572aea156b3626072ac62df93179"],"state_sha256":"a781bb554c6e0d176ad2602cd3644c5d9281f1fcb9168e833dbb35bb821fed19"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ViL+lHwRgi31Ojj7MS7kig0cu88nWXRv5d679axPc+gcuBYg95ub3oGlkhfvupNb55oYJc7Bv3M2q583wu05DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:17:23.237895Z","bundle_sha256":"e941da7c10579b41f836c64f121625668e2fa071809f583ef2b79df84b5191d9"}}