{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:NM6F3CLUMFYV5VDNXWYBAXTX6R","short_pith_number":"pith:NM6F3CLU","schema_version":"1.0","canonical_sha256":"6b3c5d897461715ed46dbdb0105e77f44b0178ae50b1724e8eb51db4d51e0904","source":{"kind":"arxiv","id":"2003.07362","version":2},"attestation_state":"computed","paper":{"title":"Setting the Stage for Cosmic Chronometers. II. Impact of Stellar Population Synthesis Models Systematics and Full Covariance Matrix","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Cimatti, Licia Verde, Lucia Pozzetti, Michele Moresco, Raul Jimenez","submitted_at":"2020-03-16T18:00:01Z","abstract_excerpt":"The evolution of differential ages of passive galaxies at different redshifts (cosmic chronometers) has been proved to be a method potentially able to constrain the Hubble parameter in a cosmology-independent way, but the systematic uncertainties must be carefully evaluated. In this paper, we compute the contribution to the full covariance matrix of systematic uncertainties due to the choice of initial mass function, stellar library, and metallicity, exploring a variety of stellar population synthesis models. Through simulations in the redshift range 0<z<1.5 we find that the choice of the stel"},"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":"2003.07362","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-16T18:00:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c6207dd0b78d05370cad7f502785d4aa20cdd8a1ff1faaa9c81b2a87a8b5580","abstract_canon_sha256":"6d8d5ff9a8ba3dbe86ef9ceaaec75f1b8ae6cc6078765d2b3469a748e70c8e42"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:50:12.580274Z","signature_b64":"CaYfTOOrI9QQNHEA4kuBUDryBmiUeWDndl97MLdErGB/oyp38SV0fNaY6TkhSSQNL/E7KTm8nJ4pnGJSDbIxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b3c5d897461715ed46dbdb0105e77f44b0178ae50b1724e8eb51db4d51e0904","last_reissued_at":"2026-07-05T03:50:12.579816Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:50:12.579816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Setting the Stage for Cosmic Chronometers. II. Impact of Stellar Population Synthesis Models Systematics and Full Covariance Matrix","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Cimatti, Licia Verde, Lucia Pozzetti, Michele Moresco, Raul Jimenez","submitted_at":"2020-03-16T18:00:01Z","abstract_excerpt":"The evolution of differential ages of passive galaxies at different redshifts (cosmic chronometers) has been proved to be a method potentially able to constrain the Hubble parameter in a cosmology-independent way, but the systematic uncertainties must be carefully evaluated. In this paper, we compute the contribution to the full covariance matrix of systematic uncertainties due to the choice of initial mass function, stellar library, and metallicity, exploring a variety of stellar population synthesis models. Through simulations in the redshift range 0<z<1.5 we find that the choice of the stel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.07362","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2003.07362/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2003.07362","created_at":"2026-07-05T03:50:12.579880+00:00"},{"alias_kind":"arxiv_version","alias_value":"2003.07362v2","created_at":"2026-07-05T03:50:12.579880+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.07362","created_at":"2026-07-05T03:50:12.579880+00:00"},{"alias_kind":"pith_short_12","alias_value":"NM6F3CLUMFYV","created_at":"2026-07-05T03:50:12.579880+00:00"},{"alias_kind":"pith_short_16","alias_value":"NM6F3CLUMFYV5VDN","created_at":"2026-07-05T03:50:12.579880+00:00"},{"alias_kind":"pith_short_8","alias_value":"NM6F3CLU","created_at":"2026-07-05T03:50:12.579880+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":18,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.21670","citing_title":"Effective field theory interpretation of ATLAS measurements involving the Higgs boson, electroweak bosons and the top quark","ref_index":103,"is_internal_anchor":false},{"citing_arxiv_id":"2606.27173","citing_title":"Redshift-Dependent Intrinsic Dispersion in the Quasar UV/X-ray Luminosity Relation","ref_index":67,"is_internal_anchor":false},{"citing_arxiv_id":"2606.12464","citing_title":"Kinematic Probes of Type-II MMG: Pad\\'e Cosmographic Analysis of VCDM","ref_index":38,"is_internal_anchor":false},{"citing_arxiv_id":"2606.28288","citing_title":"Generalizing the interacting dilatonic ghost condensate as a dark energy model","ref_index":71,"is_internal_anchor":false},{"citing_arxiv_id":"2606.28488","citing_title":"Dark energy from neutrino interactions in Unimodular Gravity","ref_index":74,"is_internal_anchor":false},{"citing_arxiv_id":"2605.30139","citing_title":"Cosmo-PINN: A Physics-Informed Neural Network for Cosmological Reconstruction","ref_index":97,"is_internal_anchor":false},{"citing_arxiv_id":"2502.11625","citing_title":"Comparative Analysis of EMCEE, Gaussian Process, and Masked Autoregressive Flow in Constraining the Hubble Constant Using Cosmic Chronometers Dataset","ref_index":20,"is_internal_anchor":false},{"citing_arxiv_id":"2603.03568","citing_title":"Observational constraints on Luciano-Saridakis entropic cosmology","ref_index":100,"is_internal_anchor":false},{"citing_arxiv_id":"2211.04492","citing_title":"The Hubble Tension and Early Dark Energy","ref_index":70,"is_internal_anchor":false},{"citing_arxiv_id":"2512.03314","citing_title":"EFT of Dark Energy with Cosmic Chronometers: Reconstructing Background EFT Functions","ref_index":28,"is_internal_anchor":false},{"citing_arxiv_id":"2512.20383","citing_title":"A Spectrum of Cosmological Rips and Their Observational Signatures","ref_index":50,"is_internal_anchor":false},{"citing_arxiv_id":"2601.14222","citing_title":"Revisiting the Matter Creation Process: Observational Constraints on Gravitationally Induced Dark Energy and the Hubble Tension","ref_index":147,"is_internal_anchor":false},{"citing_arxiv_id":"2603.27616","citing_title":"Model-independent test of the cosmic distance duality relation with recent observational data","ref_index":67,"is_internal_anchor":false},{"citing_arxiv_id":"2605.13427","citing_title":"Latent-Space Gaussian Processes for Dark-Energy Reconstruction from Observational \\(H(z)\\) Data","ref_index":69,"is_internal_anchor":false},{"citing_arxiv_id":"2604.22372","citing_title":"Testing $\\Lambda$CDM with ANN-Reconstructed Expansion History from Cosmic Chronometers","ref_index":31,"is_internal_anchor":false},{"citing_arxiv_id":"2604.21671","citing_title":"Saturation Mechanisms in the Interacting Dark Sector","ref_index":104,"is_internal_anchor":false},{"citing_arxiv_id":"2604.21962","citing_title":"Perturbation Dynamics and Structure Formation in Extended Proca-Nuevo Gravity","ref_index":61,"is_internal_anchor":false},{"citing_arxiv_id":"2604.18723","citing_title":"Model-independent reconstruction of cosmic thermodynamics and dark energy dynamics","ref_index":33,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R","json":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R.json","graph_json":"https://pith.science/api/pith-number/NM6F3CLUMFYV5VDNXWYBAXTX6R/graph.json","events_json":"https://pith.science/api/pith-number/NM6F3CLUMFYV5VDNXWYBAXTX6R/events.json","paper":"https://pith.science/paper/NM6F3CLU"},"agent_actions":{"view_html":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R","download_json":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R.json","view_paper":"https://pith.science/paper/NM6F3CLU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2003.07362&json=true","fetch_graph":"https://pith.science/api/pith-number/NM6F3CLUMFYV5VDNXWYBAXTX6R/graph.json","fetch_events":"https://pith.science/api/pith-number/NM6F3CLUMFYV5VDNXWYBAXTX6R/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R/action/storage_attestation","attest_author":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R/action/author_attestation","sign_citation":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R/action/citation_signature","submit_replication":"https://pith.science/pith/NM6F3CLUMFYV5VDNXWYBAXTX6R/action/replication_record"}},"created_at":"2026-07-05T03:50:12.579880+00:00","updated_at":"2026-07-05T03:50:12.579880+00:00"}