{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:WQDF52JNGPEATCOFGMTOQ3YT4C","short_pith_number":"pith:WQDF52JN","canonical_record":{"source":{"id":"1406.4150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-06-16T20:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"9e2fa83b61d5f214ba3b68f7d4e9328ca6eedbfcddb9cd9c84134abebf200a67","abstract_canon_sha256":"f23dbf01725e8894fb427d8da4e4d84dfc7dc27df385160b45bebebd5b19f6e2"},"schema_version":"1.0"},"canonical_sha256":"b4065ee92d33c80989c53326e86f13e0b193de72ada39afd75a459af38749ebc","source":{"kind":"arxiv","id":"1406.4150","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.4150","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"arxiv_version","alias_value":"1406.4150v1","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.4150","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"pith_short_12","alias_value":"WQDF52JNGPEA","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WQDF52JNGPEATCOF","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WQDF52JN","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:WQDF52JNGPEATCOFGMTOQ3YT4C","target":"record","payload":{"canonical_record":{"source":{"id":"1406.4150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-06-16T20:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"9e2fa83b61d5f214ba3b68f7d4e9328ca6eedbfcddb9cd9c84134abebf200a67","abstract_canon_sha256":"f23dbf01725e8894fb427d8da4e4d84dfc7dc27df385160b45bebebd5b19f6e2"},"schema_version":"1.0"},"canonical_sha256":"b4065ee92d33c80989c53326e86f13e0b193de72ada39afd75a459af38749ebc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:56.241839Z","signature_b64":"UuCQrQIPUvUAcxYL5SGsxlzkhbMH2Lf6PSWDYO/gNAc8foWATruZW8r7NjShfZynnGoywnCQ3GKI78f48g3ZDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4065ee92d33c80989c53326e86f13e0b193de72ada39afd75a459af38749ebc","last_reissued_at":"2026-05-18T01:42:56.241293Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:56.241293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.4150","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":"2026-05-18T01:42:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+0yHHjBH1y0P9QrJArxZrmb09lfB3GOdePXbxQcPT/s5zAlL6nrQixOhFKE81iooYvVabjw+pUyBedufDDQCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:28:10.510412Z"},"content_sha256":"7a4ae54c59a50939d9d4b7869a2115bddabd0f923457450b9032855ce2d96b67","schema_version":"1.0","event_id":"sha256:7a4ae54c59a50939d9d4b7869a2115bddabd0f923457450b9032855ce2d96b67"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:WQDF52JNGPEATCOFGMTOQ3YT4C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The morphology of the Milky Way - I. Reconstructing CO maps from simulations in fixed potentials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alex R. Pettitt, Clare L. Dobbs, Daniel J. Price, David M. Acreman","submitted_at":"2014-06-16T20:01:35Z","abstract_excerpt":"We present an investigation into the morphological features of the Milky Way. We use smoothed particle hydrodynamics (SPH) to simulate the interstellar medium (ISM) in the Milky Way under the effect of a number of different gravitational potentials representing spiral arms and bars, assuming the Milky Way is grand design in nature. The gas is subject to ISM cooling and chemistry, enabling us to track the evolution of molecular gas. We use a 3D radiative transfer code to simulate the emission from the SPH output, allowing for the construction of synthetic longitude-velocity (l-v) emission maps "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.4150","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":"2026-05-18T01:42:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z1VdIT039kZlq77uQQEv0Mrcqff2LkLfT69GKLH4urg4wYB+ZwgDqw3wEQ7YBuHdob52Df+yvt8/vvPVKIEHBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:28:10.511060Z"},"content_sha256":"4abb4f96de51c256e4cce95a7ec74bbfb562b177fbb83eef3201cccc87eae056","schema_version":"1.0","event_id":"sha256:4abb4f96de51c256e4cce95a7ec74bbfb562b177fbb83eef3201cccc87eae056"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/bundle.json","state_url":"https://pith.science/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/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":"2026-05-27T09:28:10Z","links":{"resolver":"https://pith.science/pith/WQDF52JNGPEATCOFGMTOQ3YT4C","bundle":"https://pith.science/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/bundle.json","state":"https://pith.science/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WQDF52JNGPEATCOFGMTOQ3YT4C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:WQDF52JNGPEATCOFGMTOQ3YT4C","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":"f23dbf01725e8894fb427d8da4e4d84dfc7dc27df385160b45bebebd5b19f6e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-06-16T20:01:35Z","title_canon_sha256":"9e2fa83b61d5f214ba3b68f7d4e9328ca6eedbfcddb9cd9c84134abebf200a67"},"schema_version":"1.0","source":{"id":"1406.4150","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.4150","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"arxiv_version","alias_value":"1406.4150v1","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.4150","created_at":"2026-05-18T01:42:56Z"},{"alias_kind":"pith_short_12","alias_value":"WQDF52JNGPEA","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WQDF52JNGPEATCOF","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WQDF52JN","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:4abb4f96de51c256e4cce95a7ec74bbfb562b177fbb83eef3201cccc87eae056","target":"graph","created_at":"2026-05-18T01:42:56Z","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 present an investigation into the morphological features of the Milky Way. We use smoothed particle hydrodynamics (SPH) to simulate the interstellar medium (ISM) in the Milky Way under the effect of a number of different gravitational potentials representing spiral arms and bars, assuming the Milky Way is grand design in nature. The gas is subject to ISM cooling and chemistry, enabling us to track the evolution of molecular gas. We use a 3D radiative transfer code to simulate the emission from the SPH output, allowing for the construction of synthetic longitude-velocity (l-v) emission maps ","authors_text":"Alex R. Pettitt, Clare L. Dobbs, Daniel J. Price, David M. Acreman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-06-16T20:01:35Z","title":"The morphology of the Milky Way - I. Reconstructing CO maps from simulations in fixed potentials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.4150","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":"sha256:7a4ae54c59a50939d9d4b7869a2115bddabd0f923457450b9032855ce2d96b67","target":"record","created_at":"2026-05-18T01:42:56Z","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":"f23dbf01725e8894fb427d8da4e4d84dfc7dc27df385160b45bebebd5b19f6e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-06-16T20:01:35Z","title_canon_sha256":"9e2fa83b61d5f214ba3b68f7d4e9328ca6eedbfcddb9cd9c84134abebf200a67"},"schema_version":"1.0","source":{"id":"1406.4150","kind":"arxiv","version":1}},"canonical_sha256":"b4065ee92d33c80989c53326e86f13e0b193de72ada39afd75a459af38749ebc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4065ee92d33c80989c53326e86f13e0b193de72ada39afd75a459af38749ebc","first_computed_at":"2026-05-18T01:42:56.241293Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:56.241293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UuCQrQIPUvUAcxYL5SGsxlzkhbMH2Lf6PSWDYO/gNAc8foWATruZW8r7NjShfZynnGoywnCQ3GKI78f48g3ZDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:56.241839Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.4150","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a4ae54c59a50939d9d4b7869a2115bddabd0f923457450b9032855ce2d96b67","sha256:4abb4f96de51c256e4cce95a7ec74bbfb562b177fbb83eef3201cccc87eae056"],"state_sha256":"916dea8cb8013f9e43021ee831a6449c3e3e05b40eb1eaa7275ae115fe544c08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7RMOHvPhpE5+5jOybOPgII4V3Eiz273bZyNa/6tS1dKGhDTJzqpK3kh5F2rC0Rqceyre+53517cmaSWvEWkiAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:28:10.514293Z","bundle_sha256":"1f55d82695a1bbb291eb72ae66c1607b48e52255594e666708275385b38515fc"}}