{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:PO7FAP6F2SSX2RWJQ5T7DVHBOH","short_pith_number":"pith:PO7FAP6F","canonical_record":{"source":{"id":"0704.1652","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-12T19:48:42Z","cross_cats_sorted":[],"title_canon_sha256":"44be01719acef8966c2b04c268851e710b2c3d36bbe70ffcf61d37610f7baaa8","abstract_canon_sha256":"bf54f9fcc8196490e31c58622ab00198e272a9e584570af0817c7fe23398efa5"},"schema_version":"1.0"},"canonical_sha256":"7bbe503fc5d4a57d46c98767f1d4e171d14201164c66eee90d5404ab583119f9","source":{"kind":"arxiv","id":"0704.1652","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.1652","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"arxiv_version","alias_value":"0704.1652v1","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.1652","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_12","alias_value":"PO7FAP6F2SSX","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_16","alias_value":"PO7FAP6F2SSX2RWJ","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_8","alias_value":"PO7FAP6F","created_at":"2026-07-04T15:44:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:PO7FAP6F2SSX2RWJQ5T7DVHBOH","target":"record","payload":{"canonical_record":{"source":{"id":"0704.1652","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-12T19:48:42Z","cross_cats_sorted":[],"title_canon_sha256":"44be01719acef8966c2b04c268851e710b2c3d36bbe70ffcf61d37610f7baaa8","abstract_canon_sha256":"bf54f9fcc8196490e31c58622ab00198e272a9e584570af0817c7fe23398efa5"},"schema_version":"1.0"},"canonical_sha256":"7bbe503fc5d4a57d46c98767f1d4e171d14201164c66eee90d5404ab583119f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:44:13.761812Z","signature_b64":"nj0YuTMNU7lZE5D2kyPVOzB5ptncF6muegj44CRYMNrw7dXSC3X25sqg2Uoz49i6mH8qp7RBUgAauH33STkyCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7bbe503fc5d4a57d46c98767f1d4e171d14201164c66eee90d5404ab583119f9","last_reissued_at":"2026-07-04T15:44:13.761422Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:44:13.761422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0704.1652","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":"2026-07-04T15:44:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qgGMOSjMCIysUymUiBzPHtv9E4XzBOVnevRCJ/maF+ioXM/6yEDqBy71c9TvbFg7tzZzuaD06NtMU6hDBpvuDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:11:42.950498Z"},"content_sha256":"d903d4435a8a476890b41f4fb3e841b5787530759d5ee06d28cd3575554180f1","schema_version":"1.0","event_id":"sha256:d903d4435a8a476890b41f4fb3e841b5787530759d5ee06d28cd3575554180f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:PO7FAP6F2SSX2RWJQ5T7DVHBOH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interaction of Supernova Ejecta with Nearby Protoplanetary Disks","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. J. Hester, N. Ouellette, S. J. Desch","submitted_at":"2007-04-12T19:48:42Z","abstract_excerpt":"The early Solar System contained short-lived radionuclides such as 60Fe (t1/2 = 1.5 Myr) whose most likely source was a nearby supernova. Previous models of Solar System formation considered a supernova shock that triggered the collapse of the Sun's nascent molecular cloud. We advocate an alternative hypothesis, that the Solar System's protoplanetary disk had already formed when a very close (< 1 pc) supernova injected radioactive material directly into the disk. We conduct the first numerical simulations designed to answer two questions related to this hypothesis: will the disk be destroyed b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.1652","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0704.1652/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:44:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DUJWHhNv9BjtELWXx9VH8Kr0xAPTNWipntCxyK5NGvv/Gv/YXW7pjLKXUPVll7YscFdY4v5CmH4sasyjJGpVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:11:42.950871Z"},"content_sha256":"7f8612dbcd8cb2f37a9dd34757048bbfd7e9f46f76494f9456841adc3eb6a867","schema_version":"1.0","event_id":"sha256:7f8612dbcd8cb2f37a9dd34757048bbfd7e9f46f76494f9456841adc3eb6a867"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/bundle.json","state_url":"https://pith.science/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/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":"2026-07-05T07:11:42Z","links":{"resolver":"https://pith.science/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH","bundle":"https://pith.science/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/bundle.json","state":"https://pith.science/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PO7FAP6F2SSX2RWJQ5T7DVHBOH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:PO7FAP6F2SSX2RWJQ5T7DVHBOH","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":"bf54f9fcc8196490e31c58622ab00198e272a9e584570af0817c7fe23398efa5","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-12T19:48:42Z","title_canon_sha256":"44be01719acef8966c2b04c268851e710b2c3d36bbe70ffcf61d37610f7baaa8"},"schema_version":"1.0","source":{"id":"0704.1652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.1652","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"arxiv_version","alias_value":"0704.1652v1","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.1652","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_12","alias_value":"PO7FAP6F2SSX","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_16","alias_value":"PO7FAP6F2SSX2RWJ","created_at":"2026-07-04T15:44:13Z"},{"alias_kind":"pith_short_8","alias_value":"PO7FAP6F","created_at":"2026-07-04T15:44:13Z"}],"graph_snapshots":[{"event_id":"sha256:7f8612dbcd8cb2f37a9dd34757048bbfd7e9f46f76494f9456841adc3eb6a867","target":"graph","created_at":"2026-07-04T15:44:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0704.1652/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The early Solar System contained short-lived radionuclides such as 60Fe (t1/2 = 1.5 Myr) whose most likely source was a nearby supernova. Previous models of Solar System formation considered a supernova shock that triggered the collapse of the Sun's nascent molecular cloud. We advocate an alternative hypothesis, that the Solar System's protoplanetary disk had already formed when a very close (< 1 pc) supernova injected radioactive material directly into the disk. We conduct the first numerical simulations designed to answer two questions related to this hypothesis: will the disk be destroyed b","authors_text":"J. J. Hester, N. Ouellette, S. J. Desch","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-04-12T19:48:42Z","title":"Interaction of Supernova Ejecta with Nearby Protoplanetary Disks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.1652","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:d903d4435a8a476890b41f4fb3e841b5787530759d5ee06d28cd3575554180f1","target":"record","created_at":"2026-07-04T15:44:13Z","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":"bf54f9fcc8196490e31c58622ab00198e272a9e584570af0817c7fe23398efa5","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-12T19:48:42Z","title_canon_sha256":"44be01719acef8966c2b04c268851e710b2c3d36bbe70ffcf61d37610f7baaa8"},"schema_version":"1.0","source":{"id":"0704.1652","kind":"arxiv","version":1}},"canonical_sha256":"7bbe503fc5d4a57d46c98767f1d4e171d14201164c66eee90d5404ab583119f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7bbe503fc5d4a57d46c98767f1d4e171d14201164c66eee90d5404ab583119f9","first_computed_at":"2026-07-04T15:44:13.761422Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:44:13.761422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nj0YuTMNU7lZE5D2kyPVOzB5ptncF6muegj44CRYMNrw7dXSC3X25sqg2Uoz49i6mH8qp7RBUgAauH33STkyCw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:44:13.761812Z","signed_message":"canonical_sha256_bytes"},"source_id":"0704.1652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d903d4435a8a476890b41f4fb3e841b5787530759d5ee06d28cd3575554180f1","sha256:7f8612dbcd8cb2f37a9dd34757048bbfd7e9f46f76494f9456841adc3eb6a867"],"state_sha256":"f5cad4601333bbf8c7bfbdf90b62121525f8d32d663aeccdb6b00c63bd5fe7a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UZkm0Ad5lQuUy71+A2IPO+j5+BzNV2Fx8e6/8HUCX0YA9ciONXYL43duo0gV4yz35ZqxNx+WNpVdFyCJbxm5AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T07:11:42.952905Z","bundle_sha256":"5f67834933b4b86a778783b8c09507614117656021a0ed8ecdb526e4dac20fb7"}}