{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:N4XYH2RSHRMTAM4N5PMJ2REDJT","short_pith_number":"pith:N4XYH2RS","schema_version":"1.0","canonical_sha256":"6f2f83ea323c5930338debd89d44834cd58f655f1d432e3ebfcfc4836ee0e2b0","source":{"kind":"arxiv","id":"1802.02255","version":2},"attestation_state":"computed","paper":{"title":"Model Selection Using Cosmic Chronometers with Gaussian Processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Fulvio Melia, Manoj K. Yennapureddy","submitted_at":"2018-02-06T23:09:31Z","abstract_excerpt":"The use of Gaussian Processes with a measurement of the cosmic expansion rate based solely on the observation of cosmic chronometers provides a completely cosmology-independent reconstruction of the Hubble constant H(z) suitable for testing different models. The corresponding dispersion sigma_H is smaller than ~9% over the entire redshift range (0 < z < 2) of the observations, rivaling many kinds of cosmological measurements available today. We use the reconstructed H(z) function to test six different cosmologies, and show that it favours the R_h=ct universe, which has only one free parameter "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1802.02255","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-02-06T23:09:31Z","cross_cats_sorted":["astro-ph.GA","gr-qc","hep-ph"],"title_canon_sha256":"134f3174a20e949a094a3aaad6af1fd0b8b440002c703177d95bc3548adfbfe2","abstract_canon_sha256":"e46963f03967a09d97d3f54f7d392d9655a26add53a55405113bc43df8d35f15"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:19.488526Z","signature_b64":"KZ80z9DumrQdztbgH/igOqLGBOOXKVjKiGA43eys1z8cIW3edLD9DHl4DYtyfeaKH4N/9Q6vc89msjylu7HPDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6f2f83ea323c5930338debd89d44834cd58f655f1d432e3ebfcfc4836ee0e2b0","last_reissued_at":"2026-05-18T00:05:19.487946Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:19.487946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Model Selection Using Cosmic Chronometers with Gaussian Processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Fulvio Melia, Manoj K. Yennapureddy","submitted_at":"2018-02-06T23:09:31Z","abstract_excerpt":"The use of Gaussian Processes with a measurement of the cosmic expansion rate based solely on the observation of cosmic chronometers provides a completely cosmology-independent reconstruction of the Hubble constant H(z) suitable for testing different models. The corresponding dispersion sigma_H is smaller than ~9% over the entire redshift range (0 < z < 2) of the observations, rivaling many kinds of cosmological measurements available today. We use the reconstructed H(z) function to test six different cosmologies, and show that it favours the R_h=ct universe, which has only one free parameter "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02255","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1802.02255","created_at":"2026-05-18T00:05:19.488042+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.02255v2","created_at":"2026-05-18T00:05:19.488042+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02255","created_at":"2026-05-18T00:05:19.488042+00:00"},{"alias_kind":"pith_short_12","alias_value":"N4XYH2RSHRMT","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_16","alias_value":"N4XYH2RSHRMTAM4N","created_at":"2026-05-18T12:32:40.477152+00:00"},{"alias_kind":"pith_short_8","alias_value":"N4XYH2RS","created_at":"2026-05-18T12:32:40.477152+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT","json":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT.json","graph_json":"https://pith.science/api/pith-number/N4XYH2RSHRMTAM4N5PMJ2REDJT/graph.json","events_json":"https://pith.science/api/pith-number/N4XYH2RSHRMTAM4N5PMJ2REDJT/events.json","paper":"https://pith.science/paper/N4XYH2RS"},"agent_actions":{"view_html":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT","download_json":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT.json","view_paper":"https://pith.science/paper/N4XYH2RS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.02255&json=true","fetch_graph":"https://pith.science/api/pith-number/N4XYH2RSHRMTAM4N5PMJ2REDJT/graph.json","fetch_events":"https://pith.science/api/pith-number/N4XYH2RSHRMTAM4N5PMJ2REDJT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT/action/storage_attestation","attest_author":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT/action/author_attestation","sign_citation":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT/action/citation_signature","submit_replication":"https://pith.science/pith/N4XYH2RSHRMTAM4N5PMJ2REDJT/action/replication_record"}},"created_at":"2026-05-18T00:05:19.488042+00:00","updated_at":"2026-05-18T00:05:19.488042+00:00"}