{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:53T5HFCWLZGJSPL2N6O74MLVWO","short_pith_number":"pith:53T5HFCW","canonical_record":{"source":{"id":"1505.04403","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-17T15:11:43Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"79f5cdd968bc6523cd9d9911dbb8fd98b1cfcc55d84349880417fc51a8a197da","abstract_canon_sha256":"f96d2193035c5efe463c6ad9057a5ab52bccab1af2a7cef6edbc90b22a8b5ca8"},"schema_version":"1.0"},"canonical_sha256":"eee7d394565e4c993d7a6f9dfe3175b3888d4efe5457af025225ccb7d35342cb","source":{"kind":"arxiv","id":"1505.04403","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04403","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04403v2","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04403","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"pith_short_12","alias_value":"53T5HFCWLZGJ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"53T5HFCWLZGJSPL2","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"53T5HFCW","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:53T5HFCWLZGJSPL2N6O74MLVWO","target":"record","payload":{"canonical_record":{"source":{"id":"1505.04403","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-17T15:11:43Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"79f5cdd968bc6523cd9d9911dbb8fd98b1cfcc55d84349880417fc51a8a197da","abstract_canon_sha256":"f96d2193035c5efe463c6ad9057a5ab52bccab1af2a7cef6edbc90b22a8b5ca8"},"schema_version":"1.0"},"canonical_sha256":"eee7d394565e4c993d7a6f9dfe3175b3888d4efe5457af025225ccb7d35342cb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:22.892460Z","signature_b64":"JJ/7qX32jtTsDOtuQlP7Y314MGXlWEzPOyvYXBM1h/IoUEI2hIX8e0f/bF98zei/gMTAfVOToCQK67lNbeL3DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eee7d394565e4c993d7a6f9dfe3175b3888d4efe5457af025225ccb7d35342cb","last_reissued_at":"2026-05-18T01:04:22.891788Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:22.891788Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.04403","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":"2026-05-18T01:04:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yjULVNEp2H+TQM3cuqDYUDkVB5lrCs3hwWLv87+aQzh5QHFqTE0HXnbOMTcWcE5LbnWkQc8d+IjYDglFN6ozDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:29:23.401658Z"},"content_sha256":"4590f18444f2b30481a8d9c74fdee9a42a48c1a23b36e29e9c28bc20935252bc","schema_version":"1.0","event_id":"sha256:4590f18444f2b30481a8d9c74fdee9a42a48c1a23b36e29e9c28bc20935252bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:53T5HFCWLZGJSPL2N6O74MLVWO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Star formation efficiencies of molecular clouds in a galactic center environment","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Erik Bertram, Paul C. Clark, Ralf S. Klessen, Simon C. O. Glover","submitted_at":"2015-05-17T15:11:43Z","abstract_excerpt":"We use the Arepo moving mesh code to simulate the evolution of molecular clouds exposed to a harsh environment similar to that found in the galactic center (GC), in an effort to understand why the star formation efficiency (SFE) of clouds in this environment is so small. Our simulations include a simplified treatment of time-dependent chemistry and account for the highly non-isothermal nature of the gas and the dust. We model clouds with a total mass of 1.3x10^5 M_{sun} and explore the effects of varying the mean cloud density and the virial parameter, alpha = E_{kin}/|E_{pot}|. We vary the la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04403","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":"2026-05-18T01:04:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cF4HZDm/e1j+ym2B8v4K1k9qfBYd48VD9iYE2lt/OEWjw8pnka54wcSWTaZEyHBWa7spDWYBbqFwFKUI2uwrDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:29:23.401991Z"},"content_sha256":"ee7a8c11cc0b5c56b960ad2bcddb71a122289156a752a39ce79366a2e04348e9","schema_version":"1.0","event_id":"sha256:ee7a8c11cc0b5c56b960ad2bcddb71a122289156a752a39ce79366a2e04348e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/53T5HFCWLZGJSPL2N6O74MLVWO/bundle.json","state_url":"https://pith.science/pith/53T5HFCWLZGJSPL2N6O74MLVWO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/53T5HFCWLZGJSPL2N6O74MLVWO/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":"2026-06-06T16:29:23Z","links":{"resolver":"https://pith.science/pith/53T5HFCWLZGJSPL2N6O74MLVWO","bundle":"https://pith.science/pith/53T5HFCWLZGJSPL2N6O74MLVWO/bundle.json","state":"https://pith.science/pith/53T5HFCWLZGJSPL2N6O74MLVWO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/53T5HFCWLZGJSPL2N6O74MLVWO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:53T5HFCWLZGJSPL2N6O74MLVWO","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":"f96d2193035c5efe463c6ad9057a5ab52bccab1af2a7cef6edbc90b22a8b5ca8","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-17T15:11:43Z","title_canon_sha256":"79f5cdd968bc6523cd9d9911dbb8fd98b1cfcc55d84349880417fc51a8a197da"},"schema_version":"1.0","source":{"id":"1505.04403","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04403","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04403v2","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04403","created_at":"2026-05-18T01:04:22Z"},{"alias_kind":"pith_short_12","alias_value":"53T5HFCWLZGJ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"53T5HFCWLZGJSPL2","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"53T5HFCW","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:ee7a8c11cc0b5c56b960ad2bcddb71a122289156a752a39ce79366a2e04348e9","target":"graph","created_at":"2026-05-18T01:04:22Z","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 the Arepo moving mesh code to simulate the evolution of molecular clouds exposed to a harsh environment similar to that found in the galactic center (GC), in an effort to understand why the star formation efficiency (SFE) of clouds in this environment is so small. Our simulations include a simplified treatment of time-dependent chemistry and account for the highly non-isothermal nature of the gas and the dust. We model clouds with a total mass of 1.3x10^5 M_{sun} and explore the effects of varying the mean cloud density and the virial parameter, alpha = E_{kin}/|E_{pot}|. We vary the la","authors_text":"Erik Bertram, Paul C. Clark, Ralf S. Klessen, Simon C. O. Glover","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-17T15:11:43Z","title":"Star formation efficiencies of molecular clouds in a galactic center environment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04403","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":"sha256:4590f18444f2b30481a8d9c74fdee9a42a48c1a23b36e29e9c28bc20935252bc","target":"record","created_at":"2026-05-18T01:04:22Z","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":"f96d2193035c5efe463c6ad9057a5ab52bccab1af2a7cef6edbc90b22a8b5ca8","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-05-17T15:11:43Z","title_canon_sha256":"79f5cdd968bc6523cd9d9911dbb8fd98b1cfcc55d84349880417fc51a8a197da"},"schema_version":"1.0","source":{"id":"1505.04403","kind":"arxiv","version":2}},"canonical_sha256":"eee7d394565e4c993d7a6f9dfe3175b3888d4efe5457af025225ccb7d35342cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eee7d394565e4c993d7a6f9dfe3175b3888d4efe5457af025225ccb7d35342cb","first_computed_at":"2026-05-18T01:04:22.891788Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:22.891788Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JJ/7qX32jtTsDOtuQlP7Y314MGXlWEzPOyvYXBM1h/IoUEI2hIX8e0f/bF98zei/gMTAfVOToCQK67lNbeL3DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:22.892460Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.04403","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4590f18444f2b30481a8d9c74fdee9a42a48c1a23b36e29e9c28bc20935252bc","sha256:ee7a8c11cc0b5c56b960ad2bcddb71a122289156a752a39ce79366a2e04348e9"],"state_sha256":"05899b6c3e20bd04c806df2bfb2817d9921e270203ca053505faa14ea8cc0f45"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UVDffokMjdPRa1xo+NwQrMQAI3CDnywitKR/tsGHnlBE1vFbFKJZP3qrx+3bY0KUIDYr9yrpB0V2nApxBy+mAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T16:29:23.404048Z","bundle_sha256":"9846e9147f4e0f1abedff58f521dba3185a16181d0ef2e999dc3e1050e53f2d7"}}