{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:T462UIYT7OAWST3T4CZAXKFK2F","short_pith_number":"pith:T462UIYT","schema_version":"1.0","canonical_sha256":"9f3daa2313fb81694f73e0b20ba8aad1799ff53c1e304cc2da73b718f50b68fb","source":{"kind":"arxiv","id":"2502.20181","version":3},"attestation_state":"computed","paper":{"title":"Self-similar decomposition of the hierarchical merger tree of dark matter halos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Feihong He, Fuyu Dong, Jiaxin Han, Wenkang Jiang","submitted_at":"2025-02-27T15:18:28Z","abstract_excerpt":"In the $\\Lambda$CDM universe, structure formation is generally not a self-similar process, while some self-similarity remains in certain statistics which can greatly simplify our description and understanding of the cosmic structures. In this work, we show that the merger tree of dark matter halos is approximately self-similar by investigating the universality of the subhalo peak mass function (PMF) describing the mass distribution of progenitor halos. Using a set of cosmological simulations and identifying subhalos of different merger levels with HBT+, we verify that the level-1 subhalo PMF i"},"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":"2502.20181","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-02-27T15:18:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a2efb3c1eb3c98deb00136df06ed29730d3a3dfdb172d9bda53f2e4a888dafdf","abstract_canon_sha256":"866098b18ba0ffbcf298f0e28329e4c4dc34cb2ab67fc414a111d58799bb7915"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:19:51.735107Z","signature_b64":"AmGb9ylylEY4g9Jc6/TJV8C1NChNAITRNVY+sIYe2ZDYDu9cLL/wrFwFptCzDXzINaagawlGII6hr5w8KC9TCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f3daa2313fb81694f73e0b20ba8aad1799ff53c1e304cc2da73b718f50b68fb","last_reissued_at":"2026-07-05T11:19:51.734654Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:19:51.734654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Self-similar decomposition of the hierarchical merger tree of dark matter halos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Feihong He, Fuyu Dong, Jiaxin Han, Wenkang Jiang","submitted_at":"2025-02-27T15:18:28Z","abstract_excerpt":"In the $\\Lambda$CDM universe, structure formation is generally not a self-similar process, while some self-similarity remains in certain statistics which can greatly simplify our description and understanding of the cosmic structures. In this work, we show that the merger tree of dark matter halos is approximately self-similar by investigating the universality of the subhalo peak mass function (PMF) describing the mass distribution of progenitor halos. Using a set of cosmological simulations and identifying subhalos of different merger levels with HBT+, we verify that the level-1 subhalo PMF i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.20181","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/2502.20181/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":"2502.20181","created_at":"2026-07-05T11:19:51.734710+00:00"},{"alias_kind":"arxiv_version","alias_value":"2502.20181v3","created_at":"2026-07-05T11:19:51.734710+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.20181","created_at":"2026-07-05T11:19:51.734710+00:00"},{"alias_kind":"pith_short_12","alias_value":"T462UIYT7OAW","created_at":"2026-07-05T11:19:51.734710+00:00"},{"alias_kind":"pith_short_16","alias_value":"T462UIYT7OAWST3T","created_at":"2026-07-05T11:19:51.734710+00:00"},{"alias_kind":"pith_short_8","alias_value":"T462UIYT","created_at":"2026-07-05T11:19:51.734710+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.05580","citing_title":"The Broken Similarity: Sinking and Merging of Dark Matter Subhalos Across Hierarchical Levels","ref_index":42,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F","json":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F.json","graph_json":"https://pith.science/api/pith-number/T462UIYT7OAWST3T4CZAXKFK2F/graph.json","events_json":"https://pith.science/api/pith-number/T462UIYT7OAWST3T4CZAXKFK2F/events.json","paper":"https://pith.science/paper/T462UIYT"},"agent_actions":{"view_html":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F","download_json":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F.json","view_paper":"https://pith.science/paper/T462UIYT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2502.20181&json=true","fetch_graph":"https://pith.science/api/pith-number/T462UIYT7OAWST3T4CZAXKFK2F/graph.json","fetch_events":"https://pith.science/api/pith-number/T462UIYT7OAWST3T4CZAXKFK2F/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F/action/timestamp_anchor","attest_storage":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F/action/storage_attestation","attest_author":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F/action/author_attestation","sign_citation":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F/action/citation_signature","submit_replication":"https://pith.science/pith/T462UIYT7OAWST3T4CZAXKFK2F/action/replication_record"}},"created_at":"2026-07-05T11:19:51.734710+00:00","updated_at":"2026-07-05T11:19:51.734710+00:00"}