{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XREP7H6ILASHWIO4JEXAOCTD5K","short_pith_number":"pith:XREP7H6I","canonical_record":{"source":{"id":"1706.00435","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-01T18:00:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9eb7278c6b5684efc4ef0e5c257e05e7f091ab04576780aa680f765bb031ef29","abstract_canon_sha256":"7ede64ed61b762b6866438f5578b7b2d105cb89c1ecb99a4a2d9e088075aed77"},"schema_version":"1.0"},"canonical_sha256":"bc48ff9fc858247b21dc492e070a63ea834cc9842337e3c44ef91f4470301e47","source":{"kind":"arxiv","id":"1706.00435","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.00435","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"arxiv_version","alias_value":"1706.00435v2","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.00435","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"pith_short_12","alias_value":"XREP7H6ILASH","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XREP7H6ILASHWIO4","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XREP7H6I","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XREP7H6ILASHWIO4JEXAOCTD5K","target":"record","payload":{"canonical_record":{"source":{"id":"1706.00435","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-01T18:00:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9eb7278c6b5684efc4ef0e5c257e05e7f091ab04576780aa680f765bb031ef29","abstract_canon_sha256":"7ede64ed61b762b6866438f5578b7b2d105cb89c1ecb99a4a2d9e088075aed77"},"schema_version":"1.0"},"canonical_sha256":"bc48ff9fc858247b21dc492e070a63ea834cc9842337e3c44ef91f4470301e47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:29.111585Z","signature_b64":"MVx8IE/OJN4HZQkzqxNVZuVkISREXAjrRDHFUCqcqFoMLKGf+rUA9yUBXoF8OGSL9uTU9J3aqwbDTPWGDJeOCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bc48ff9fc858247b21dc492e070a63ea834cc9842337e3c44ef91f4470301e47","last_reissued_at":"2026-05-18T00:34:29.111222Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:29.111222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.00435","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":"2026-05-18T00:34:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lbTVGx6GkasIlueBcwMPGKQAMk4LHAE1jeLwwZmhL5F80NuSlDUjReFMjZgKnTG2BUywQiyOlIGkpDk+GDcCCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:00:14.545518Z"},"content_sha256":"289ed7685d7ecbb62451149d025d70177952635631a9b62c5d7ca90841f64137","schema_version":"1.0","event_id":"sha256:289ed7685d7ecbb62451149d025d70177952635631a9b62c5d7ca90841f64137"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XREP7H6ILASHWIO4JEXAOCTD5K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First star formation in ultra-light particle dark matter cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"James M. Sullivan, Shingo Hirano, Volker Bromm","submitted_at":"2017-06-01T18:00:04Z","abstract_excerpt":"The formation of the first stars in the high-redshift Universe is a sensitive probe of the small-scale, particle physics nature of dark matter (DM). We carry out cosmological simulations of primordial star formation in ultra-light, axion-like particle DM cosmology, with masses of $10^{-22}$ and $10^{-21}\\,{\\rm eV}$, with de Broglie wavelengths approaching galactic scales ($\\sim$kpc). The onset of star formation is delayed, and shifted to more massive host structures. For the lightest DM particle mass explored here, first stars form at $z \\sim 7$ in structures with $\\sim 10^9\\,{\\rm M}_\\odot$, c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.00435","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":"2026-05-18T00:34:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V/KPZdTZAXZ2FBspY8UP3NRStuVfFkKcWM1sabO/oCusSgyCZK3fjw9EDnVL5d6k88t05nShxG1VrXPHyAZEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:00:14.545906Z"},"content_sha256":"1139b6ba7ca8b89362c2cacf01acdd9ca4de45d46c89e23d5979f10f47d0ff75","schema_version":"1.0","event_id":"sha256:1139b6ba7ca8b89362c2cacf01acdd9ca4de45d46c89e23d5979f10f47d0ff75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XREP7H6ILASHWIO4JEXAOCTD5K/bundle.json","state_url":"https://pith.science/pith/XREP7H6ILASHWIO4JEXAOCTD5K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XREP7H6ILASHWIO4JEXAOCTD5K/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":"2026-05-25T13:00:14Z","links":{"resolver":"https://pith.science/pith/XREP7H6ILASHWIO4JEXAOCTD5K","bundle":"https://pith.science/pith/XREP7H6ILASHWIO4JEXAOCTD5K/bundle.json","state":"https://pith.science/pith/XREP7H6ILASHWIO4JEXAOCTD5K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XREP7H6ILASHWIO4JEXAOCTD5K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XREP7H6ILASHWIO4JEXAOCTD5K","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":"7ede64ed61b762b6866438f5578b7b2d105cb89c1ecb99a4a2d9e088075aed77","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-01T18:00:04Z","title_canon_sha256":"9eb7278c6b5684efc4ef0e5c257e05e7f091ab04576780aa680f765bb031ef29"},"schema_version":"1.0","source":{"id":"1706.00435","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.00435","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"arxiv_version","alias_value":"1706.00435v2","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.00435","created_at":"2026-05-18T00:34:29Z"},{"alias_kind":"pith_short_12","alias_value":"XREP7H6ILASH","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XREP7H6ILASHWIO4","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XREP7H6I","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:1139b6ba7ca8b89362c2cacf01acdd9ca4de45d46c89e23d5979f10f47d0ff75","target":"graph","created_at":"2026-05-18T00:34:29Z","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":"The formation of the first stars in the high-redshift Universe is a sensitive probe of the small-scale, particle physics nature of dark matter (DM). We carry out cosmological simulations of primordial star formation in ultra-light, axion-like particle DM cosmology, with masses of $10^{-22}$ and $10^{-21}\\,{\\rm eV}$, with de Broglie wavelengths approaching galactic scales ($\\sim$kpc). The onset of star formation is delayed, and shifted to more massive host structures. For the lightest DM particle mass explored here, first stars form at $z \\sim 7$ in structures with $\\sim 10^9\\,{\\rm M}_\\odot$, c","authors_text":"James M. Sullivan, Shingo Hirano, Volker Bromm","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-01T18:00:04Z","title":"First star formation in ultra-light particle dark matter cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.00435","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":"sha256:289ed7685d7ecbb62451149d025d70177952635631a9b62c5d7ca90841f64137","target":"record","created_at":"2026-05-18T00:34:29Z","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":"7ede64ed61b762b6866438f5578b7b2d105cb89c1ecb99a4a2d9e088075aed77","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-01T18:00:04Z","title_canon_sha256":"9eb7278c6b5684efc4ef0e5c257e05e7f091ab04576780aa680f765bb031ef29"},"schema_version":"1.0","source":{"id":"1706.00435","kind":"arxiv","version":2}},"canonical_sha256":"bc48ff9fc858247b21dc492e070a63ea834cc9842337e3c44ef91f4470301e47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc48ff9fc858247b21dc492e070a63ea834cc9842337e3c44ef91f4470301e47","first_computed_at":"2026-05-18T00:34:29.111222Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:29.111222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MVx8IE/OJN4HZQkzqxNVZuVkISREXAjrRDHFUCqcqFoMLKGf+rUA9yUBXoF8OGSL9uTU9J3aqwbDTPWGDJeOCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:29.111585Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.00435","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:289ed7685d7ecbb62451149d025d70177952635631a9b62c5d7ca90841f64137","sha256:1139b6ba7ca8b89362c2cacf01acdd9ca4de45d46c89e23d5979f10f47d0ff75"],"state_sha256":"312f008c35c1d33cc645398cbd8df12c86ad1429b03be3a473ba07f52e2e2cc6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s/tYkg2VafbDRglc7V7z9g8ylIylgr2Wh/z9YYjeegsD8HSnIgRWF8imvNTw4eonsRvc3aSRPdkR12E7iEBJDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:00:14.548958Z","bundle_sha256":"1b4cc8a4cb72d6373995dac09034a29e132a28d037c707f7f927e844f4c61822"}}