{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:3LIWY35BOZKEIXRXJQSAQN2MBA","short_pith_number":"pith:3LIWY35B","schema_version":"1.0","canonical_sha256":"dad16c6fa17654445e374c2408374c0835f0beb33e0e247c48ac4415a5cc7df0","source":{"kind":"arxiv","id":"2409.07805","version":2},"attestation_state":"computed","paper":{"title":"Extremely Dense Gas around Little Red Dots and High-redshift Active Galactic Nuclei: A Non-stellar Origin of the Balmer Break and Absorption Features","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Kohei Inayoshi, Roberto Maiolino","submitted_at":"2024-09-12T07:32:24Z","abstract_excerpt":"The James Webb Space Telescope (JWST) has uncovered low-luminosity active galactic nuclei (AGNs) at high redshifts of $z\\gtrsim 4-7$, powered by accreting black holes (BHs) with masses of $\\sim 10^{6-8}~M_\\odot$. One remarkable distinction of these JWST-identified AGNs, compared to their low-redshift counterparts, is that at least $\\sim 20\\%$ of them present H$\\alpha$ and/or H$\\beta$ absorption, which must be associated with extremely dense ($\\gtrsim 10^9~{\\rm cm}^{-3}$) gas in the broad-line region or its immediate surroundings. These Balmer absorption features unavoidably imply the presence "},"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":"2409.07805","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-09-12T07:32:24Z","cross_cats_sorted":[],"title_canon_sha256":"0748727714e5c624aae474dc2dc9e53e6d24431eba7d320de087a244db49324d","abstract_canon_sha256":"4e3e74acc94dc272154919117a28bc26bea75ea46c6e57837c92db1243a9f36a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:09:47.739467Z","signature_b64":"gRCflW2BzPHPC7wB8qWKZCaISG/FRXOMKnIvOEXGGOA4eyq2/TixbQCzibivrzWZ9+O4zhp4FJUxsSYt22k8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dad16c6fa17654445e374c2408374c0835f0beb33e0e247c48ac4415a5cc7df0","last_reissued_at":"2026-07-05T10:09:47.738970Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:09:47.738970Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Extremely Dense Gas around Little Red Dots and High-redshift Active Galactic Nuclei: A Non-stellar Origin of the Balmer Break and Absorption Features","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Kohei Inayoshi, Roberto Maiolino","submitted_at":"2024-09-12T07:32:24Z","abstract_excerpt":"The James Webb Space Telescope (JWST) has uncovered low-luminosity active galactic nuclei (AGNs) at high redshifts of $z\\gtrsim 4-7$, powered by accreting black holes (BHs) with masses of $\\sim 10^{6-8}~M_\\odot$. One remarkable distinction of these JWST-identified AGNs, compared to their low-redshift counterparts, is that at least $\\sim 20\\%$ of them present H$\\alpha$ and/or H$\\beta$ absorption, which must be associated with extremely dense ($\\gtrsim 10^9~{\\rm cm}^{-3}$) gas in the broad-line region or its immediate surroundings. These Balmer absorption features unavoidably imply the presence "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.07805","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/2409.07805/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":"2409.07805","created_at":"2026-07-05T10:09:47.739027+00:00"},{"alias_kind":"arxiv_version","alias_value":"2409.07805v2","created_at":"2026-07-05T10:09:47.739027+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.07805","created_at":"2026-07-05T10:09:47.739027+00:00"},{"alias_kind":"pith_short_12","alias_value":"3LIWY35BOZKE","created_at":"2026-07-05T10:09:47.739027+00:00"},{"alias_kind":"pith_short_16","alias_value":"3LIWY35BOZKEIXRX","created_at":"2026-07-05T10:09:47.739027+00:00"},{"alias_kind":"pith_short_8","alias_value":"3LIWY35B","created_at":"2026-07-05T10:09:47.739027+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":5,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.05281","citing_title":"Little red dots as a cosmological probe: constraining $H_0$ with quasi-periodic pulsations","ref_index":23,"is_internal_anchor":false},{"citing_arxiv_id":"2412.14246","citing_title":"Hidden in Pixels I: Discovery of dual \"little red dots\" indicates excess clustering on kilo-parsec scales","ref_index":15,"is_internal_anchor":false},{"citing_arxiv_id":"2605.21574","citing_title":"(LRDs)$^2$: The Low-ReDshift Little Red Dots Survey. II. DESI DR1 Sample","ref_index":52,"is_internal_anchor":false},{"citing_arxiv_id":"2503.16596","citing_title":"A \"Black Hole Star\" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots","ref_index":9,"is_internal_anchor":false},{"citing_arxiv_id":"2604.18173","citing_title":"Gravitational Waves from the Cosmic Dawn: Tracing Cosmic Black Hole Binaries with ET, LGWA and LISA","ref_index":10,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA","json":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA.json","graph_json":"https://pith.science/api/pith-number/3LIWY35BOZKEIXRXJQSAQN2MBA/graph.json","events_json":"https://pith.science/api/pith-number/3LIWY35BOZKEIXRXJQSAQN2MBA/events.json","paper":"https://pith.science/paper/3LIWY35B"},"agent_actions":{"view_html":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA","download_json":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA.json","view_paper":"https://pith.science/paper/3LIWY35B","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2409.07805&json=true","fetch_graph":"https://pith.science/api/pith-number/3LIWY35BOZKEIXRXJQSAQN2MBA/graph.json","fetch_events":"https://pith.science/api/pith-number/3LIWY35BOZKEIXRXJQSAQN2MBA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA/action/storage_attestation","attest_author":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA/action/author_attestation","sign_citation":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA/action/citation_signature","submit_replication":"https://pith.science/pith/3LIWY35BOZKEIXRXJQSAQN2MBA/action/replication_record"}},"created_at":"2026-07-05T10:09:47.739027+00:00","updated_at":"2026-07-05T10:09:47.739027+00:00"}