{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:D6K5VIW6S4EJZUS2K3QGENSRQ2","short_pith_number":"pith:D6K5VIW6","canonical_record":{"source":{"id":"1512.03260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-10T14:12:09Z","cross_cats_sorted":[],"title_canon_sha256":"97a67710a4b2ff2f6483a1f35c9ce803a3121ddaa652d6169abb6e10ef47d7e0","abstract_canon_sha256":"ef935ceb83cce21193a70772a88f9dbb94cf6eba120bdb32bd5ebc07fb239e24"},"schema_version":"1.0"},"canonical_sha256":"1f95daa2de97089cd25a56e062365186b2b1a74987295233d88fb3e1f3a50659","source":{"kind":"arxiv","id":"1512.03260","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03260","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03260v1","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03260","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"pith_short_12","alias_value":"D6K5VIW6S4EJ","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"D6K5VIW6S4EJZUS2","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"D6K5VIW6","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:D6K5VIW6S4EJZUS2K3QGENSRQ2","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-10T14:12:09Z","cross_cats_sorted":[],"title_canon_sha256":"97a67710a4b2ff2f6483a1f35c9ce803a3121ddaa652d6169abb6e10ef47d7e0","abstract_canon_sha256":"ef935ceb83cce21193a70772a88f9dbb94cf6eba120bdb32bd5ebc07fb239e24"},"schema_version":"1.0"},"canonical_sha256":"1f95daa2de97089cd25a56e062365186b2b1a74987295233d88fb3e1f3a50659","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:41.145382Z","signature_b64":"fE8x5fmuRqYOsd3ibrBhuAe4eNFHkqIZZvh1k8Ek3IwvBug9rfukHacfWddRAnycNDeiK94I0sR2EwkhUAPcBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f95daa2de97089cd25a56e062365186b2b1a74987295233d88fb3e1f3a50659","last_reissued_at":"2026-05-18T01:20:41.144548Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:41.144548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03260","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":"2026-05-18T01:20:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8EkR8LOaGRIYYzdA5JvyCwaRLCDF0kRKXNmnQwi2gA39RYoXDGeCQ26OH/IXZfpO0lZPWYHmMgxOihkjLJueDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:18:15.600294Z"},"content_sha256":"7847927df02c6fe05169989318665728a9366b806144e27f0945e8a8a96a901c","schema_version":"1.0","event_id":"sha256:7847927df02c6fe05169989318665728a9366b806144e27f0945e8a8a96a901c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:D6K5VIW6S4EJZUS2K3QGENSRQ2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How galactic environment regulates star formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Sharon E. Meidt","submitted_at":"2015-12-10T14:12:09Z","abstract_excerpt":"In a new simple model I reconcile two contradictory views on the factors that determine the rate at which molecular clouds form stars -- internal structure vs. external, environmental influences -- providing a unified picture for the regulation of star formation in galaxies. In the presence of external pressure, the pressure gradient set up within a self-gravitating isothermal cloud leads to a non-uniform density distribution. Thus the local environment of a cloud influences its internal structure. In the simple equilibrium model, the fraction of gas at high density in the cloud interior is de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03260","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":"2026-05-18T01:20:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z9WdvgCHdjHX410JAsiLJpt7xPb9layNiAU80KJeu4kfaj5qlM+iexzu4XwKJVL7tcg0o4anW7WbqKpbl7wGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:18:15.600962Z"},"content_sha256":"05d7172cc2f9ff50755b4d9e4a2972731dabca840145abbe2e7f4575430846d4","schema_version":"1.0","event_id":"sha256:05d7172cc2f9ff50755b4d9e4a2972731dabca840145abbe2e7f4575430846d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/bundle.json","state_url":"https://pith.science/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/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":"2026-06-07T05:18:15Z","links":{"resolver":"https://pith.science/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2","bundle":"https://pith.science/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/bundle.json","state":"https://pith.science/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D6K5VIW6S4EJZUS2K3QGENSRQ2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:D6K5VIW6S4EJZUS2K3QGENSRQ2","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":"ef935ceb83cce21193a70772a88f9dbb94cf6eba120bdb32bd5ebc07fb239e24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-10T14:12:09Z","title_canon_sha256":"97a67710a4b2ff2f6483a1f35c9ce803a3121ddaa652d6169abb6e10ef47d7e0"},"schema_version":"1.0","source":{"id":"1512.03260","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03260","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03260v1","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03260","created_at":"2026-05-18T01:20:41Z"},{"alias_kind":"pith_short_12","alias_value":"D6K5VIW6S4EJ","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"D6K5VIW6S4EJZUS2","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"D6K5VIW6","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:05d7172cc2f9ff50755b4d9e4a2972731dabca840145abbe2e7f4575430846d4","target":"graph","created_at":"2026-05-18T01:20:41Z","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 a new simple model I reconcile two contradictory views on the factors that determine the rate at which molecular clouds form stars -- internal structure vs. external, environmental influences -- providing a unified picture for the regulation of star formation in galaxies. In the presence of external pressure, the pressure gradient set up within a self-gravitating isothermal cloud leads to a non-uniform density distribution. Thus the local environment of a cloud influences its internal structure. In the simple equilibrium model, the fraction of gas at high density in the cloud interior is de","authors_text":"Sharon E. Meidt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-10T14:12:09Z","title":"How galactic environment regulates star formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03260","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":"sha256:7847927df02c6fe05169989318665728a9366b806144e27f0945e8a8a96a901c","target":"record","created_at":"2026-05-18T01:20:41Z","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":"ef935ceb83cce21193a70772a88f9dbb94cf6eba120bdb32bd5ebc07fb239e24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-10T14:12:09Z","title_canon_sha256":"97a67710a4b2ff2f6483a1f35c9ce803a3121ddaa652d6169abb6e10ef47d7e0"},"schema_version":"1.0","source":{"id":"1512.03260","kind":"arxiv","version":1}},"canonical_sha256":"1f95daa2de97089cd25a56e062365186b2b1a74987295233d88fb3e1f3a50659","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f95daa2de97089cd25a56e062365186b2b1a74987295233d88fb3e1f3a50659","first_computed_at":"2026-05-18T01:20:41.144548Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:41.144548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fE8x5fmuRqYOsd3ibrBhuAe4eNFHkqIZZvh1k8Ek3IwvBug9rfukHacfWddRAnycNDeiK94I0sR2EwkhUAPcBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:41.145382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03260","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7847927df02c6fe05169989318665728a9366b806144e27f0945e8a8a96a901c","sha256:05d7172cc2f9ff50755b4d9e4a2972731dabca840145abbe2e7f4575430846d4"],"state_sha256":"158db59daa105c48282aed6562e3af35b9dfaa68b4572b29047b2546a0b8a862"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PAh7pvbNlCfKlBC+3D0u/7DZevw9vrMU5cRSy5R6ckijrbodmC4AbCgHdhKktzKVbY8vUPtNTTVG03IiplDnDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T05:18:15.604240Z","bundle_sha256":"bf66b72e42f8519263a59696bb5d2ceaade7c080b2c37747006756b1629a1b25"}}