{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:VVOOPNGD3OX7CDLYVH6UHI65G3","short_pith_number":"pith:VVOOPNGD","schema_version":"1.0","canonical_sha256":"ad5ce7b4c3dbaff10d78a9fd43a3dd36f3748a8dd7c94e778652ff15618c4c0d","source":{"kind":"arxiv","id":"2107.04639","version":3},"attestation_state":"computed","paper":{"title":"Repeated mergers, mass-gap black holes, and formation of intermediate-mass black holes in nuclear star clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Bence Kocsis, Frederic A. Rasio, Giacomo Fragione, Joseph Silk","submitted_at":"2021-07-09T19:24:16Z","abstract_excerpt":"Current theoretical models predict a mass gap with a dearth of stellar black holes (BHs) between roughly $50\\,M_\\odot$ and $100\\,M_\\odot$, while, above the range accessible through massive star evolution, intermediate-mass BHs (IMBHs) still remain elusive. Repeated mergers of binary BHs, detectable via gravitational wave emission with the current LIGO/Virgo/Kagra interferometers and future detectors such as LISA or the Einstein Telescope, can form both mass-gap BHs and IMBHs. Here we explore the possibility that mass-gap BHs and IMBHs are born as a result of successive BH mergers in dense star"},"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":"2107.04639","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-09T19:24:16Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"cb8a31863fa9adc4e826578cf1715c9102803f0de3ff5866e704b3ca8eb65f73","abstract_canon_sha256":"7584038ec40855cbd7aa62722890c7a3afbc14d1ae873f000b254955e88ab650"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:09:36.040431Z","signature_b64":"banCzZbR2S9VpLn+qQjrGCQq3ptmF9GEasVyCmxDXvoemKMnbNLj5rzS9nZvNyHpKbURsvdCcSLGW53KjyDYDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad5ce7b4c3dbaff10d78a9fd43a3dd36f3748a8dd7c94e778652ff15618c4c0d","last_reissued_at":"2026-07-05T04:09:36.039926Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:09:36.039926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Repeated mergers, mass-gap black holes, and formation of intermediate-mass black holes in nuclear star clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Bence Kocsis, Frederic A. Rasio, Giacomo Fragione, Joseph Silk","submitted_at":"2021-07-09T19:24:16Z","abstract_excerpt":"Current theoretical models predict a mass gap with a dearth of stellar black holes (BHs) between roughly $50\\,M_\\odot$ and $100\\,M_\\odot$, while, above the range accessible through massive star evolution, intermediate-mass BHs (IMBHs) still remain elusive. Repeated mergers of binary BHs, detectable via gravitational wave emission with the current LIGO/Virgo/Kagra interferometers and future detectors such as LISA or the Einstein Telescope, can form both mass-gap BHs and IMBHs. Here we explore the possibility that mass-gap BHs and IMBHs are born as a result of successive BH mergers in dense star"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.04639","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.04639/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":"2107.04639","created_at":"2026-07-05T04:09:36.039990+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.04639v3","created_at":"2026-07-05T04:09:36.039990+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.04639","created_at":"2026-07-05T04:09:36.039990+00:00"},{"alias_kind":"pith_short_12","alias_value":"VVOOPNGD3OX7","created_at":"2026-07-05T04:09:36.039990+00:00"},{"alias_kind":"pith_short_16","alias_value":"VVOOPNGD3OX7CDLY","created_at":"2026-07-05T04:09:36.039990+00:00"},{"alias_kind":"pith_short_8","alias_value":"VVOOPNGD","created_at":"2026-07-05T04:09:36.039990+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2501.16422","citing_title":"Gravitational wave inference of star cluster properties from intermediate-mass black hole mergers","ref_index":108,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3","json":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3.json","graph_json":"https://pith.science/api/pith-number/VVOOPNGD3OX7CDLYVH6UHI65G3/graph.json","events_json":"https://pith.science/api/pith-number/VVOOPNGD3OX7CDLYVH6UHI65G3/events.json","paper":"https://pith.science/paper/VVOOPNGD"},"agent_actions":{"view_html":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3","download_json":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3.json","view_paper":"https://pith.science/paper/VVOOPNGD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.04639&json=true","fetch_graph":"https://pith.science/api/pith-number/VVOOPNGD3OX7CDLYVH6UHI65G3/graph.json","fetch_events":"https://pith.science/api/pith-number/VVOOPNGD3OX7CDLYVH6UHI65G3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3/action/storage_attestation","attest_author":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3/action/author_attestation","sign_citation":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3/action/citation_signature","submit_replication":"https://pith.science/pith/VVOOPNGD3OX7CDLYVH6UHI65G3/action/replication_record"}},"created_at":"2026-07-05T04:09:36.039990+00:00","updated_at":"2026-07-05T04:09:36.039990+00:00"}