{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:UMRF2PTVMFWA73TCDFDTX2RHBV","short_pith_number":"pith:UMRF2PTV","canonical_record":{"source":{"id":"2507.21409","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-07-29T00:33:44Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"b31298221583b24e2bf61dd7021fa5c07886dd72bb238adf030acc19bc8c7030","abstract_canon_sha256":"ff766d12ab9df25dc7fb8c370c2a95f628b8792f16a459fee43d863228655077"},"schema_version":"1.0"},"canonical_sha256":"a3225d3e75616c0fee6219473bea270d78c25a992e56b963850a411f8f8dc7ea","source":{"kind":"arxiv","id":"2507.21409","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21409","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21409v1","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21409","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"UMRF2PTVMFWA","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_16","alias_value":"UMRF2PTVMFWA73TC","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_8","alias_value":"UMRF2PTV","created_at":"2026-07-05T11:44:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:UMRF2PTVMFWA73TCDFDTX2RHBV","target":"record","payload":{"canonical_record":{"source":{"id":"2507.21409","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-07-29T00:33:44Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"b31298221583b24e2bf61dd7021fa5c07886dd72bb238adf030acc19bc8c7030","abstract_canon_sha256":"ff766d12ab9df25dc7fb8c370c2a95f628b8792f16a459fee43d863228655077"},"schema_version":"1.0"},"canonical_sha256":"a3225d3e75616c0fee6219473bea270d78c25a992e56b963850a411f8f8dc7ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:44:59.049099Z","signature_b64":"MojMwa7l5iGM5FGKfO4RoUXyvHiZJVJTO4A7zwOOSrytPGRXKE/VIdFZuEQwIkrZnPD0+4iAzhOk0jLzbLXGAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a3225d3e75616c0fee6219473bea270d78c25a992e56b963850a411f8f8dc7ea","last_reissued_at":"2026-07-05T11:44:59.048692Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:44:59.048692Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.21409","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":"2026-07-05T11:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1rnRFYVg1IuUM2UDEMXKqADmaOczZhmn+vXH1ptoWXU1S1dt9KGR8NIwRFm4LViwpOzbPVyWIZq2+oezbudlBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T10:58:40.997420Z"},"content_sha256":"e5124db490afcc90311889305f3a46fb2ad7f9828d93fa3c09ae06cea8823458","schema_version":"1.0","event_id":"sha256:e5124db490afcc90311889305f3a46fb2ad7f9828d93fa3c09ae06cea8823458"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:UMRF2PTVMFWA73TCDFDTX2RHBV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Explaining the \"too massive\" high-redshift galaxies in JWST data: numerical study of three effects and a simple relation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Gabriele Montefalcone, Jonathan Lozano, Joshua J. Ziegler, Katherine Freese","submitted_at":"2025-07-29T00:33:44Z","abstract_excerpt":"The James Webb Space Telescope has discovered high luminosity galaxies that appear to be \"too many\" and \"too massive\" compared to predictions of the Standard LCDM cosmology, suggesting that star formation in the early universe is more rapid than previously anticipated. In this paper we examine in detail the following three effects which can instead provide alternative explanations for these observations: (1) a \"top heavy\" initial mass function (IMF) for the stars, (2) a variety of star formation histories (constant, exponentially decreasing, and peaked star formation rates), and (3) a variety "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21409","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/2507.21409/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":"2026-07-05T11:44:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r7o67AMteYTK38wwvwXxZGnLX6uyLPnWF1JyhdUyrbqSoV4nvmjQ+StIhRC+GvizEE5HPL8xVoRCssUN45cwDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T10:58:40.997932Z"},"content_sha256":"9cc97fdb74d37e754c92d849591efd4bb05cd3f417cd5803cf74251fd12ebfdd","schema_version":"1.0","event_id":"sha256:9cc97fdb74d37e754c92d849591efd4bb05cd3f417cd5803cf74251fd12ebfdd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/bundle.json","state_url":"https://pith.science/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/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":"2026-08-11T10:58:41Z","links":{"resolver":"https://pith.science/pith/UMRF2PTVMFWA73TCDFDTX2RHBV","bundle":"https://pith.science/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/bundle.json","state":"https://pith.science/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UMRF2PTVMFWA73TCDFDTX2RHBV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:UMRF2PTVMFWA73TCDFDTX2RHBV","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":"ff766d12ab9df25dc7fb8c370c2a95f628b8792f16a459fee43d863228655077","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-07-29T00:33:44Z","title_canon_sha256":"b31298221583b24e2bf61dd7021fa5c07886dd72bb238adf030acc19bc8c7030"},"schema_version":"1.0","source":{"id":"2507.21409","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21409","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21409v1","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21409","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_12","alias_value":"UMRF2PTVMFWA","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_16","alias_value":"UMRF2PTVMFWA73TC","created_at":"2026-07-05T11:44:59Z"},{"alias_kind":"pith_short_8","alias_value":"UMRF2PTV","created_at":"2026-07-05T11:44:59Z"}],"graph_snapshots":[{"event_id":"sha256:9cc97fdb74d37e754c92d849591efd4bb05cd3f417cd5803cf74251fd12ebfdd","target":"graph","created_at":"2026-07-05T11:44:59Z","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/2507.21409/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The James Webb Space Telescope has discovered high luminosity galaxies that appear to be \"too many\" and \"too massive\" compared to predictions of the Standard LCDM cosmology, suggesting that star formation in the early universe is more rapid than previously anticipated. In this paper we examine in detail the following three effects which can instead provide alternative explanations for these observations: (1) a \"top heavy\" initial mass function (IMF) for the stars, (2) a variety of star formation histories (constant, exponentially decreasing, and peaked star formation rates), and (3) a variety ","authors_text":"Gabriele Montefalcone, Jonathan Lozano, Joshua J. Ziegler, Katherine Freese","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-07-29T00:33:44Z","title":"Explaining the \"too massive\" high-redshift galaxies in JWST data: numerical study of three effects and a simple relation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21409","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:e5124db490afcc90311889305f3a46fb2ad7f9828d93fa3c09ae06cea8823458","target":"record","created_at":"2026-07-05T11:44:59Z","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":"ff766d12ab9df25dc7fb8c370c2a95f628b8792f16a459fee43d863228655077","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-07-29T00:33:44Z","title_canon_sha256":"b31298221583b24e2bf61dd7021fa5c07886dd72bb238adf030acc19bc8c7030"},"schema_version":"1.0","source":{"id":"2507.21409","kind":"arxiv","version":1}},"canonical_sha256":"a3225d3e75616c0fee6219473bea270d78c25a992e56b963850a411f8f8dc7ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a3225d3e75616c0fee6219473bea270d78c25a992e56b963850a411f8f8dc7ea","first_computed_at":"2026-07-05T11:44:59.048692Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:44:59.048692Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MojMwa7l5iGM5FGKfO4RoUXyvHiZJVJTO4A7zwOOSrytPGRXKE/VIdFZuEQwIkrZnPD0+4iAzhOk0jLzbLXGAw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:44:59.049099Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.21409","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5124db490afcc90311889305f3a46fb2ad7f9828d93fa3c09ae06cea8823458","sha256:9cc97fdb74d37e754c92d849591efd4bb05cd3f417cd5803cf74251fd12ebfdd"],"state_sha256":"bb520997a38e508db267ef4de44ce422f28508b3e0110bdf00ceda16cf1120f2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aBrtZKbbDF5kCusQg7p1PBWltLv0xdedxl14KxJaYMr8kH/T7b30dk1AGQLzXNAdODJc1noeEz/s9WKi0mdcBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T10:58:41.002499Z","bundle_sha256":"b873db2e5eb8b6b6c9aaa0dfe14346dc04b5b177bc95edfa134cdcf2972fb3b1"}}