{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:5FJSJDDIXPJ5GD4LPOHF4F6STN","short_pith_number":"pith:5FJSJDDI","schema_version":"1.0","canonical_sha256":"e953248c68bbd3d30f8b7b8e5e17d29b6d5628ee03e226897941aaffc874067a","source":{"kind":"arxiv","id":"2506.09184","version":1},"attestation_state":"computed","paper":{"title":"Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aklant K. Bhowmick, Aneesh Sivasankaran, Lars Hernquist, Laura Blecha, Luke Z. Kelley, Mark Vogelsberger, Nianyi Chen, Paul Torrey, Priyamvada Natarajan, Rainer Weinberger","submitted_at":"2025-06-10T19:01:42Z","abstract_excerpt":"We analyze the dynamics of low-mass black hole (BH) seeds in the high-redshift ($z\\gtrsim5$) Universe using a suite of $[4.5~\\mathrm{Mpc}]^3$ and $[9~\\mathrm{Mpc}]^3$ BRAHMA cosmological hydrodynamic simulations. The simulations form seeds with mass $M_{\\mathrm{seed}}=2.2\\times10^3~M_{\\odot}$ in halos that exceed critical thresholds of dense & metal-poor gas mass ($5-150~M_{\\mathrm{seed}}$) and the halo mass ($1000-10000~M_{\\mathrm{seed}}$). While the initial BRAHMA boxes pinned the BHs to the halo centers, here we implement a sub-grid dynamical friction (DF) model. We also compare simulations"},"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":"2506.09184","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-10T19:01:42Z","cross_cats_sorted":[],"title_canon_sha256":"44aba3edfdbb402b848df19592a937ab084cb67d831b7d4b7d3eb1f14230f86d","abstract_canon_sha256":"18572ae443c58f3cf5243483fe6f5fcc7cb8c379a06bfdef3e3bbe6fb1a3fa02"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:19:32.648132Z","signature_b64":"iIE8DiXyt2bAl600hgiljmpBOAYug1CaHAFW0mipMs5+N6L5hTO9O0fp/HqKM0i72+uUnckelR9EbxImm42YBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e953248c68bbd3d30f8b7b8e5e17d29b6d5628ee03e226897941aaffc874067a","last_reissued_at":"2026-07-05T11:19:32.647638Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:19:32.647638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aklant K. Bhowmick, Aneesh Sivasankaran, Lars Hernquist, Laura Blecha, Luke Z. Kelley, Mark Vogelsberger, Nianyi Chen, Paul Torrey, Priyamvada Natarajan, Rainer Weinberger","submitted_at":"2025-06-10T19:01:42Z","abstract_excerpt":"We analyze the dynamics of low-mass black hole (BH) seeds in the high-redshift ($z\\gtrsim5$) Universe using a suite of $[4.5~\\mathrm{Mpc}]^3$ and $[9~\\mathrm{Mpc}]^3$ BRAHMA cosmological hydrodynamic simulations. The simulations form seeds with mass $M_{\\mathrm{seed}}=2.2\\times10^3~M_{\\odot}$ in halos that exceed critical thresholds of dense & metal-poor gas mass ($5-150~M_{\\mathrm{seed}}$) and the halo mass ($1000-10000~M_{\\mathrm{seed}}$). While the initial BRAHMA boxes pinned the BHs to the halo centers, here we implement a sub-grid dynamical friction (DF) model. We also compare simulations"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.09184","kind":"arxiv","version":1},"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/2506.09184/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":"2506.09184","created_at":"2026-07-05T11:19:32.647712+00:00"},{"alias_kind":"arxiv_version","alias_value":"2506.09184v1","created_at":"2026-07-05T11:19:32.647712+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.09184","created_at":"2026-07-05T11:19:32.647712+00:00"},{"alias_kind":"pith_short_12","alias_value":"5FJSJDDIXPJ5","created_at":"2026-07-05T11:19:32.647712+00:00"},{"alias_kind":"pith_short_16","alias_value":"5FJSJDDIXPJ5GD4L","created_at":"2026-07-05T11:19:32.647712+00:00"},{"alias_kind":"pith_short_8","alias_value":"5FJSJDDI","created_at":"2026-07-05T11:19:32.647712+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.07793","citing_title":"Tracing black hole and galaxy growth across environments since cosmic noon","ref_index":98,"is_internal_anchor":true},{"citing_arxiv_id":"2606.10036","citing_title":"Learning the Universe at High Redshifts: Impact of Accretion Modeling on Early Black Hole Growth","ref_index":12,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN","json":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN.json","graph_json":"https://pith.science/api/pith-number/5FJSJDDIXPJ5GD4LPOHF4F6STN/graph.json","events_json":"https://pith.science/api/pith-number/5FJSJDDIXPJ5GD4LPOHF4F6STN/events.json","paper":"https://pith.science/paper/5FJSJDDI"},"agent_actions":{"view_html":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN","download_json":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN.json","view_paper":"https://pith.science/paper/5FJSJDDI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2506.09184&json=true","fetch_graph":"https://pith.science/api/pith-number/5FJSJDDIXPJ5GD4LPOHF4F6STN/graph.json","fetch_events":"https://pith.science/api/pith-number/5FJSJDDIXPJ5GD4LPOHF4F6STN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN/action/storage_attestation","attest_author":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN/action/author_attestation","sign_citation":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN/action/citation_signature","submit_replication":"https://pith.science/pith/5FJSJDDIXPJ5GD4LPOHF4F6STN/action/replication_record"}},"created_at":"2026-07-05T11:19:32.647712+00:00","updated_at":"2026-07-05T11:19:32.647712+00:00"}