{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:ILGBLLOPD3V5KELSDE7BAUPZBK","short_pith_number":"pith:ILGBLLOP","schema_version":"1.0","canonical_sha256":"42cc15adcf1eebd51172193e1051f90aa02ec5451af23589a078daa333a8da2b","source":{"kind":"arxiv","id":"1510.06018","version":3},"attestation_state":"computed","paper":{"title":"Quasars Probing Quasars VIII. The Physical Properties of the Cool Circumgalactic Medium Surrounding z ~ 2-3 Massive Galaxies Hosting Quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Max Planck Institute for Astronomy), Joseph F. Hennawi (2) ((1) UCO/Lick Observatory, J. Xavier Prochaska (1), Marie Wingyee Lau (1), UC Santa Cruz","submitted_at":"2015-10-20T19:44:13Z","abstract_excerpt":"We characterize the physical properties of the cool T ~10^4 K circumgalactic medium surrounding z ~2-3 quasar host galaxies, which are predicted to evolve into present day massive ellipticals. Using a statistical sample of 14 quasar pairs with projected separation < 300 kpc and high dispersion, high S/N spectra, we find extreme kinematics with low metal ion lines typically spanning ~ 500 km/s, exceeding any previously studied galactic population. The CGM is significantly enriched, even beyond the virial radius, with a median metallicity [M/H] ~ -0.6. The alpha/Fe abundance ratio is enhanced, s"},"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":"1510.06018","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-20T19:44:13Z","cross_cats_sorted":[],"title_canon_sha256":"08a7cd3d1c06bf64815813fea28ad0b0b26b5509ada777867a4d36326aa65815","abstract_canon_sha256":"5c309c1ff7bb77fdc7ef0a9044727849466d44622b932b79d65160f61cba0e5d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:01:29.011417Z","signature_b64":"M1fU5bKRSipPaCAYYIkMOJGzle3XoDnOnLGWvd8bx5rwj/d8d2QvrmlFwrJEFbH2KD8M4uSPsBAKfFlP4qggDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42cc15adcf1eebd51172193e1051f90aa02ec5451af23589a078daa333a8da2b","last_reissued_at":"2026-05-18T01:01:29.010926Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:01:29.010926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quasars Probing Quasars VIII. The Physical Properties of the Cool Circumgalactic Medium Surrounding z ~ 2-3 Massive Galaxies Hosting Quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Max Planck Institute for Astronomy), Joseph F. Hennawi (2) ((1) UCO/Lick Observatory, J. Xavier Prochaska (1), Marie Wingyee Lau (1), UC Santa Cruz","submitted_at":"2015-10-20T19:44:13Z","abstract_excerpt":"We characterize the physical properties of the cool T ~10^4 K circumgalactic medium surrounding z ~2-3 quasar host galaxies, which are predicted to evolve into present day massive ellipticals. Using a statistical sample of 14 quasar pairs with projected separation < 300 kpc and high dispersion, high S/N spectra, we find extreme kinematics with low metal ion lines typically spanning ~ 500 km/s, exceeding any previously studied galactic population. The CGM is significantly enriched, even beyond the virial radius, with a median metallicity [M/H] ~ -0.6. The alpha/Fe abundance ratio is enhanced, s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06018","kind":"arxiv","version":3},"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":"1510.06018","created_at":"2026-05-18T01:01:29.010993+00:00"},{"alias_kind":"arxiv_version","alias_value":"1510.06018v3","created_at":"2026-05-18T01:01:29.010993+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06018","created_at":"2026-05-18T01:01:29.010993+00:00"},{"alias_kind":"pith_short_12","alias_value":"ILGBLLOPD3V5","created_at":"2026-05-18T12:29:25.134429+00:00"},{"alias_kind":"pith_short_16","alias_value":"ILGBLLOPD3V5KELS","created_at":"2026-05-18T12:29:25.134429+00:00"},{"alias_kind":"pith_short_8","alias_value":"ILGBLLOP","created_at":"2026-05-18T12:29:25.134429+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/ILGBLLOPD3V5KELSDE7BAUPZBK","json":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK.json","graph_json":"https://pith.science/api/pith-number/ILGBLLOPD3V5KELSDE7BAUPZBK/graph.json","events_json":"https://pith.science/api/pith-number/ILGBLLOPD3V5KELSDE7BAUPZBK/events.json","paper":"https://pith.science/paper/ILGBLLOP"},"agent_actions":{"view_html":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK","download_json":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK.json","view_paper":"https://pith.science/paper/ILGBLLOP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1510.06018&json=true","fetch_graph":"https://pith.science/api/pith-number/ILGBLLOPD3V5KELSDE7BAUPZBK/graph.json","fetch_events":"https://pith.science/api/pith-number/ILGBLLOPD3V5KELSDE7BAUPZBK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK/action/storage_attestation","attest_author":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK/action/author_attestation","sign_citation":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK/action/citation_signature","submit_replication":"https://pith.science/pith/ILGBLLOPD3V5KELSDE7BAUPZBK/action/replication_record"}},"created_at":"2026-05-18T01:01:29.010993+00:00","updated_at":"2026-05-18T01:01:29.010993+00:00"}