{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:WTR44CZUWHVJXZCGR6UW4JUSC3","short_pith_number":"pith:WTR44CZU","canonical_record":{"source":{"id":"1310.4674","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-17T12:28:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"caa4790188f80e536c046244e15e5c08b37fb328a2dd8e5f58299f2ac8359ebc","abstract_canon_sha256":"867b36b5c78ef02a26d96d89cd1554c4b90024da87b617de8daec37d2ec63e16"},"schema_version":"1.0"},"canonical_sha256":"b4e3ce0b34b1ea9be4468fa96e269216f25670571a2b268b2cf3383a3a56ef72","source":{"kind":"arxiv","id":"1310.4674","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4674","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4674v1","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4674","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"pith_short_12","alias_value":"WTR44CZUWHVJ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WTR44CZUWHVJXZCG","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WTR44CZU","created_at":"2026-05-18T12:28:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:WTR44CZUWHVJXZCGR6UW4JUSC3","target":"record","payload":{"canonical_record":{"source":{"id":"1310.4674","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-17T12:28:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"caa4790188f80e536c046244e15e5c08b37fb328a2dd8e5f58299f2ac8359ebc","abstract_canon_sha256":"867b36b5c78ef02a26d96d89cd1554c4b90024da87b617de8daec37d2ec63e16"},"schema_version":"1.0"},"canonical_sha256":"b4e3ce0b34b1ea9be4468fa96e269216f25670571a2b268b2cf3383a3a56ef72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:10:13.309134Z","signature_b64":"H/2nsgsaal5i35zdePZ+M6vd81TPhmbvU+op9OWJN6kllyLYCTTlqJ4oWnutCOYMtaO0ozZJaNhGBBIxMFEnDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4e3ce0b34b1ea9be4468fa96e269216f25670571a2b268b2cf3383a3a56ef72","last_reissued_at":"2026-05-18T03:10:13.308598Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:10:13.308598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.4674","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":"2026-05-18T03:10:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c3Te7XwrJakya9prglAnwfDw3qXfetr+K2qnlonQ/d87K3d+uv2X1FNoZRT7iNkTlGUBUrmsY3l7OlxxK3a4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T07:38:11.912392Z"},"content_sha256":"df30c18609780226a9313a3fbf5bd745b919583409cd4c275cade4466cdfc62c","schema_version":"1.0","event_id":"sha256:df30c18609780226a9313a3fbf5bd745b919583409cd4c275cade4466cdfc62c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:WTR44CZUWHVJXZCGR6UW4JUSC3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spiral Structure Dynamics in Pure Stellar Disk Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Brazil), Diego Valencia-Enriquez (INAOE, IP&D, Ivanio Puerari (INAOE, Mexico, Mexico), UniVap","submitted_at":"2013-10-17T12:28:00Z","abstract_excerpt":"In order to understand the physical mechanism underlying non-steady stellar spiral arms in disk galaxies we performed a series of N-body simulations with 1.2 and 8 million particles. The initial conditions were chosen to follow Kuijken-Dubinski models. In this work we present the results of a sub-sample of our simulations in which we experiment with different disk central radial velocity dispersion and the disk scale height."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4674","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":"2026-05-18T03:10:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"smnzzQRxDRaie2yoHEg2/vESW5uP15CGbASiHx5DRDKAcqRl/InEx++8p6RLUx2407HGd+nv6Y9Dft1V4+MzBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T07:38:11.912734Z"},"content_sha256":"020308c86bddd26d4094bd7b94b74457cc7efc8b9e941375fef61fbf871d8786","schema_version":"1.0","event_id":"sha256:020308c86bddd26d4094bd7b94b74457cc7efc8b9e941375fef61fbf871d8786"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/bundle.json","state_url":"https://pith.science/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/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":"2026-06-01T07:38:11Z","links":{"resolver":"https://pith.science/pith/WTR44CZUWHVJXZCGR6UW4JUSC3","bundle":"https://pith.science/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/bundle.json","state":"https://pith.science/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WTR44CZUWHVJXZCGR6UW4JUSC3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WTR44CZUWHVJXZCGR6UW4JUSC3","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":"867b36b5c78ef02a26d96d89cd1554c4b90024da87b617de8daec37d2ec63e16","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-17T12:28:00Z","title_canon_sha256":"caa4790188f80e536c046244e15e5c08b37fb328a2dd8e5f58299f2ac8359ebc"},"schema_version":"1.0","source":{"id":"1310.4674","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4674","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4674v1","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4674","created_at":"2026-05-18T03:10:13Z"},{"alias_kind":"pith_short_12","alias_value":"WTR44CZUWHVJ","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WTR44CZUWHVJXZCG","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WTR44CZU","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:020308c86bddd26d4094bd7b94b74457cc7efc8b9e941375fef61fbf871d8786","target":"graph","created_at":"2026-05-18T03:10:13Z","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":"In order to understand the physical mechanism underlying non-steady stellar spiral arms in disk galaxies we performed a series of N-body simulations with 1.2 and 8 million particles. The initial conditions were chosen to follow Kuijken-Dubinski models. In this work we present the results of a sub-sample of our simulations in which we experiment with different disk central radial velocity dispersion and the disk scale height.","authors_text":"Brazil), Diego Valencia-Enriquez (INAOE, IP&D, Ivanio Puerari (INAOE, Mexico, Mexico), UniVap","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-17T12:28:00Z","title":"Spiral Structure Dynamics in Pure Stellar Disk Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4674","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:df30c18609780226a9313a3fbf5bd745b919583409cd4c275cade4466cdfc62c","target":"record","created_at":"2026-05-18T03:10:13Z","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":"867b36b5c78ef02a26d96d89cd1554c4b90024da87b617de8daec37d2ec63e16","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-17T12:28:00Z","title_canon_sha256":"caa4790188f80e536c046244e15e5c08b37fb328a2dd8e5f58299f2ac8359ebc"},"schema_version":"1.0","source":{"id":"1310.4674","kind":"arxiv","version":1}},"canonical_sha256":"b4e3ce0b34b1ea9be4468fa96e269216f25670571a2b268b2cf3383a3a56ef72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4e3ce0b34b1ea9be4468fa96e269216f25670571a2b268b2cf3383a3a56ef72","first_computed_at":"2026-05-18T03:10:13.308598Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:10:13.308598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H/2nsgsaal5i35zdePZ+M6vd81TPhmbvU+op9OWJN6kllyLYCTTlqJ4oWnutCOYMtaO0ozZJaNhGBBIxMFEnDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:10:13.309134Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.4674","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df30c18609780226a9313a3fbf5bd745b919583409cd4c275cade4466cdfc62c","sha256:020308c86bddd26d4094bd7b94b74457cc7efc8b9e941375fef61fbf871d8786"],"state_sha256":"895f2bcd0a4259ff9390ffc72a5754e75e23a3354dae387e5ef8909d9e14fec3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"myLKlwO9H+U7JjrdNOCUwRlsIo6BRgM8peGG7CIOBJlAOzi+b9q+OUDuFc80VviOTs026m5p5fV0LEpofHbUCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T07:38:11.914593Z","bundle_sha256":"45392f5e38f3147f665758108eeb354bccf377cd07ef948b0f56346e7ba88d06"}}