{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ESWHHQVXAUBIIQOZUDSA4RZLHI","short_pith_number":"pith:ESWHHQVX","canonical_record":{"source":{"id":"1803.08056","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"42dad7258750724b4f4bf90758830a9168af38346c8ad8fbc6ff61e47cbdd524","abstract_canon_sha256":"18cdce4377793be785f4578e75b129c4c50a6faca714006771497a6380edff29"},"schema_version":"1.0"},"canonical_sha256":"24ac73c2b705028441d9a0e40e472b3a11a6b7230a8bb48b54ee8f00b7b2dd47","source":{"kind":"arxiv","id":"1803.08056","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.08056","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"arxiv_version","alias_value":"1803.08056v2","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.08056","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"pith_short_12","alias_value":"ESWHHQVXAUBI","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"ESWHHQVXAUBIIQOZ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"ESWHHQVX","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ESWHHQVXAUBIIQOZUDSA4RZLHI","target":"record","payload":{"canonical_record":{"source":{"id":"1803.08056","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"42dad7258750724b4f4bf90758830a9168af38346c8ad8fbc6ff61e47cbdd524","abstract_canon_sha256":"18cdce4377793be785f4578e75b129c4c50a6faca714006771497a6380edff29"},"schema_version":"1.0"},"canonical_sha256":"24ac73c2b705028441d9a0e40e472b3a11a6b7230a8bb48b54ee8f00b7b2dd47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:17.868757Z","signature_b64":"R5no9/cM2Yx5zhAkpsz5llXFwsEuvL1jMG7sNG4ojFd5R2pC+FtwzVl+y3rTCyKHaFYX2SQpPmCRwqV9ltFRAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24ac73c2b705028441d9a0e40e472b3a11a6b7230a8bb48b54ee8f00b7b2dd47","last_reissued_at":"2026-05-18T00:07:17.867837Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:17.867837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.08056","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":"2026-05-18T00:07:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XRzeUAts7dLHBrA2+SxkFA+H5gjqYmAUitskLXmdbiH/bhSAAExgUlAKRhEYSTelexqNKWIEVdkUTmTTAIthAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:05:53.320372Z"},"content_sha256":"dc7d89a0ffed0bafc672baed40f9e334e04a637c1763b9be60e99b00ab6cf114","schema_version":"1.0","event_id":"sha256:dc7d89a0ffed0bafc672baed40f9e334e04a637c1763b9be60e99b00ab6cf114"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ESWHHQVXAUBIIQOZUDSA4RZLHI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structural and Dynamical Properties of Galaxies in a Hierarchical Universe: Sizes and Specific Angular Momenta","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anna Zoldan, Fabio Fontanot, Gabriella De Lucia, Lizhi Xie, Michaela Hirschmann","submitted_at":"2018-03-21T18:00:07Z","abstract_excerpt":"We use a state-of-the-art semi-analytic model to study the size and the specific angular momentum of galaxies. Our model includes a specific treatment for the angular momentum exchange between different galactic components. Disk scale radii are estimated from the angular momentum of the gaseous/stellar disk, while bulge sizes are estimated assuming energy conservation. The predicted size--mass and angular momentum--mass relations are in fair agreement with observational measurements in the local Universe, provided a treatment for gas dissipation during major mergers is included. Our treatment "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.08056","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":"2026-05-18T00:07:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"22CYt8ETb+DbbUMb4DAVp2jO+hC3uoK9QAUKQdu3MfdfcSt2UNyprI43L2ik9doj19n81QwhTzoNKamYLQbiDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:05:53.320708Z"},"content_sha256":"05a6e1458d4056c6d392a83946717b66ec0c016cf854a70de9266d420d531c9d","schema_version":"1.0","event_id":"sha256:05a6e1458d4056c6d392a83946717b66ec0c016cf854a70de9266d420d531c9d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/bundle.json","state_url":"https://pith.science/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/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":"2026-06-01T16:05:53Z","links":{"resolver":"https://pith.science/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI","bundle":"https://pith.science/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/bundle.json","state":"https://pith.science/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESWHHQVXAUBIIQOZUDSA4RZLHI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ESWHHQVXAUBIIQOZUDSA4RZLHI","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":"18cdce4377793be785f4578e75b129c4c50a6faca714006771497a6380edff29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T18:00:07Z","title_canon_sha256":"42dad7258750724b4f4bf90758830a9168af38346c8ad8fbc6ff61e47cbdd524"},"schema_version":"1.0","source":{"id":"1803.08056","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.08056","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"arxiv_version","alias_value":"1803.08056v2","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.08056","created_at":"2026-05-18T00:07:17Z"},{"alias_kind":"pith_short_12","alias_value":"ESWHHQVXAUBI","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"ESWHHQVXAUBIIQOZ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"ESWHHQVX","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:05a6e1458d4056c6d392a83946717b66ec0c016cf854a70de9266d420d531c9d","target":"graph","created_at":"2026-05-18T00:07:17Z","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 use a state-of-the-art semi-analytic model to study the size and the specific angular momentum of galaxies. Our model includes a specific treatment for the angular momentum exchange between different galactic components. Disk scale radii are estimated from the angular momentum of the gaseous/stellar disk, while bulge sizes are estimated assuming energy conservation. The predicted size--mass and angular momentum--mass relations are in fair agreement with observational measurements in the local Universe, provided a treatment for gas dissipation during major mergers is included. Our treatment ","authors_text":"Anna Zoldan, Fabio Fontanot, Gabriella De Lucia, Lizhi Xie, Michaela Hirschmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T18:00:07Z","title":"Structural and Dynamical Properties of Galaxies in a Hierarchical Universe: Sizes and Specific Angular Momenta"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.08056","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:dc7d89a0ffed0bafc672baed40f9e334e04a637c1763b9be60e99b00ab6cf114","target":"record","created_at":"2026-05-18T00:07:17Z","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":"18cdce4377793be785f4578e75b129c4c50a6faca714006771497a6380edff29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-21T18:00:07Z","title_canon_sha256":"42dad7258750724b4f4bf90758830a9168af38346c8ad8fbc6ff61e47cbdd524"},"schema_version":"1.0","source":{"id":"1803.08056","kind":"arxiv","version":2}},"canonical_sha256":"24ac73c2b705028441d9a0e40e472b3a11a6b7230a8bb48b54ee8f00b7b2dd47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24ac73c2b705028441d9a0e40e472b3a11a6b7230a8bb48b54ee8f00b7b2dd47","first_computed_at":"2026-05-18T00:07:17.867837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:17.867837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R5no9/cM2Yx5zhAkpsz5llXFwsEuvL1jMG7sNG4ojFd5R2pC+FtwzVl+y3rTCyKHaFYX2SQpPmCRwqV9ltFRAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:17.868757Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.08056","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc7d89a0ffed0bafc672baed40f9e334e04a637c1763b9be60e99b00ab6cf114","sha256:05a6e1458d4056c6d392a83946717b66ec0c016cf854a70de9266d420d531c9d"],"state_sha256":"1d44972323482f2449bce7cc61204fee0185e4fc6a572bdefa52bd7c084c03f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PUD49g5qFmpTTDhqH1NXH7i2fVwdwXw8B+laXv7cqVmehlgoC+9zTuWJf9s763mrVpMR0+h5ypzlgOn7h9rlAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:05:53.322588Z","bundle_sha256":"63e226624edf60464ea2fff4d32592f9068edbfef92ac22ae9ab0bb87a930982"}}