{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IREYJTRZ2SBL774KMD4JYAQHJP","short_pith_number":"pith:IREYJTRZ","canonical_record":{"source":{"id":"1109.3699","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-16T19:28:56Z","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"title_canon_sha256":"bb4d5c063b4958e0cdafc2ea4ea5cf6ae5219770b73de9f19831902fe97a9e39","abstract_canon_sha256":"5f2df38f1f46c588eebe368e832556b170054b67fdcf2637edf53ebd8c59b249"},"schema_version":"1.0"},"canonical_sha256":"444984ce39d482bfff8a60f89c02074be7b0840c916a1e957ae8eea49e17e846","source":{"kind":"arxiv","id":"1109.3699","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3699","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3699v2","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3699","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"pith_short_12","alias_value":"IREYJTRZ2SBL","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IREYJTRZ2SBL774K","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IREYJTRZ","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IREYJTRZ2SBL774KMD4JYAQHJP","target":"record","payload":{"canonical_record":{"source":{"id":"1109.3699","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-16T19:28:56Z","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"title_canon_sha256":"bb4d5c063b4958e0cdafc2ea4ea5cf6ae5219770b73de9f19831902fe97a9e39","abstract_canon_sha256":"5f2df38f1f46c588eebe368e832556b170054b67fdcf2637edf53ebd8c59b249"},"schema_version":"1.0"},"canonical_sha256":"444984ce39d482bfff8a60f89c02074be7b0840c916a1e957ae8eea49e17e846","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:21:36.607633Z","signature_b64":"+q0RfJXXJeIDzxT7csZGlYTc5N7KQTseWsJtlY1h5NPPycEAGnyB58XHdm4mCatREFLcnzI951W9JEJBcul/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"444984ce39d482bfff8a60f89c02074be7b0840c916a1e957ae8eea49e17e846","last_reissued_at":"2026-05-18T02:21:36.606977Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:21:36.606977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.3699","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":"2026-05-18T02:21:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pfvriWMMbqIVn0Nj6+hOTYjEVmSiEgLOEKNX3xQDkkhA09z4xotWL0U5J4XnGcGmX6yDs2RwggRBguyuTT4ACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:09:06.089471Z"},"content_sha256":"370791259ecaa528abfa9fd646506d3623390083da56f6a39075351ad8c7b03a","schema_version":"1.0","event_id":"sha256:370791259ecaa528abfa9fd646506d3623390083da56f6a39075351ad8c7b03a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IREYJTRZ2SBL774KMD4JYAQHJP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Dependence of the Galactic Star Formation Laws on Metallicity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Jonathan Braine, Laurent Piau, Sami Dib, Subhanjoy Mohanty","submitted_at":"2011-09-16T19:28:56Z","abstract_excerpt":"We describe results from semi-analytical modelling of star formation in protocluster clumps of different metallicities. In this model, gravitationally bound cores form uniformly in the clump following a prescribed core formation efficiency per unit time. After a contraction timescale which is equal to a few times their free-fall times, the cores collapse into stars and populate the IMF. Feedback from the newly formed OB stars is taken into account in the form of stellar winds. When the ratio of the effective energy of the winds to the gravitational energy of the system reaches unity, gas is re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3699","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":"2026-05-18T02:21:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DKaCuwUnNzgvXobfH4g1z3l6G9EvHaYBnnddEqrO9/0pHy0dVe+ZabszkSS7iSoh3X0NNZkqkmtpe2g/uRs/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:09:06.089815Z"},"content_sha256":"8e92b19a01a80c0d56e080e02184ea30bcb73a85c3e599ce59a7d733e1e75518","schema_version":"1.0","event_id":"sha256:8e92b19a01a80c0d56e080e02184ea30bcb73a85c3e599ce59a7d733e1e75518"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IREYJTRZ2SBL774KMD4JYAQHJP/bundle.json","state_url":"https://pith.science/pith/IREYJTRZ2SBL774KMD4JYAQHJP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IREYJTRZ2SBL774KMD4JYAQHJP/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":"2026-06-01T19:09:06Z","links":{"resolver":"https://pith.science/pith/IREYJTRZ2SBL774KMD4JYAQHJP","bundle":"https://pith.science/pith/IREYJTRZ2SBL774KMD4JYAQHJP/bundle.json","state":"https://pith.science/pith/IREYJTRZ2SBL774KMD4JYAQHJP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IREYJTRZ2SBL774KMD4JYAQHJP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IREYJTRZ2SBL774KMD4JYAQHJP","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":"5f2df38f1f46c588eebe368e832556b170054b67fdcf2637edf53ebd8c59b249","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-16T19:28:56Z","title_canon_sha256":"bb4d5c063b4958e0cdafc2ea4ea5cf6ae5219770b73de9f19831902fe97a9e39"},"schema_version":"1.0","source":{"id":"1109.3699","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3699","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3699v2","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3699","created_at":"2026-05-18T02:21:36Z"},{"alias_kind":"pith_short_12","alias_value":"IREYJTRZ2SBL","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IREYJTRZ2SBL774K","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IREYJTRZ","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:8e92b19a01a80c0d56e080e02184ea30bcb73a85c3e599ce59a7d733e1e75518","target":"graph","created_at":"2026-05-18T02:21:36Z","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 describe results from semi-analytical modelling of star formation in protocluster clumps of different metallicities. In this model, gravitationally bound cores form uniformly in the clump following a prescribed core formation efficiency per unit time. After a contraction timescale which is equal to a few times their free-fall times, the cores collapse into stars and populate the IMF. Feedback from the newly formed OB stars is taken into account in the form of stellar winds. When the ratio of the effective energy of the winds to the gravitational energy of the system reaches unity, gas is re","authors_text":"Jonathan Braine, Laurent Piau, Sami Dib, Subhanjoy Mohanty","cross_cats":["astro-ph.CO","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-16T19:28:56Z","title":"The Dependence of the Galactic Star Formation Laws on Metallicity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3699","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":"sha256:370791259ecaa528abfa9fd646506d3623390083da56f6a39075351ad8c7b03a","target":"record","created_at":"2026-05-18T02:21:36Z","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":"5f2df38f1f46c588eebe368e832556b170054b67fdcf2637edf53ebd8c59b249","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-16T19:28:56Z","title_canon_sha256":"bb4d5c063b4958e0cdafc2ea4ea5cf6ae5219770b73de9f19831902fe97a9e39"},"schema_version":"1.0","source":{"id":"1109.3699","kind":"arxiv","version":2}},"canonical_sha256":"444984ce39d482bfff8a60f89c02074be7b0840c916a1e957ae8eea49e17e846","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"444984ce39d482bfff8a60f89c02074be7b0840c916a1e957ae8eea49e17e846","first_computed_at":"2026-05-18T02:21:36.606977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:36.606977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+q0RfJXXJeIDzxT7csZGlYTc5N7KQTseWsJtlY1h5NPPycEAGnyB58XHdm4mCatREFLcnzI951W9JEJBcul/Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:36.607633Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.3699","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:370791259ecaa528abfa9fd646506d3623390083da56f6a39075351ad8c7b03a","sha256:8e92b19a01a80c0d56e080e02184ea30bcb73a85c3e599ce59a7d733e1e75518"],"state_sha256":"eee47ed76ebe225e1ea7ac9e1685c227b44c492f2d3fcfdf398bee2e320f2731"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SVmKOhRFTBbwIpMZdFKF/N0xYp1NuQz2xpmXAaCqmj9IS12BEuSItvN6wp2DNhbqRwW+RUxAEOyQmBfP+tZKAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T19:09:06.091766Z","bundle_sha256":"7c5f799974555d2ba0e8b7241d1ad2a1ffbbc1e1fe63f00a6373fc7e5ee670ed"}}