{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:ADBAPWFQ542WG4Y6VO6RZEYKEG","short_pith_number":"pith:ADBAPWFQ","schema_version":"1.0","canonical_sha256":"00c207d8b0ef3563731eabbd1c930a21abc823c0cbf352bfc2634d40d9e4e271","source":{"kind":"arxiv","id":"2606.19478","version":1},"attestation_state":"computed","paper":{"title":"Something green beneath the surface: The dynamical nature of Fossil Structures in IllustrisTNG-100","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cristian A. Vega-Mart\\'inez, Diego Pallero, Facundo A. G\\'omez, Franklin Ald\\'as, Mary Verdugo-Santos","submitted_at":"2026-06-17T18:11:47Z","abstract_excerpt":"Fossil structures (FS) have traditionally been considered dynamically relaxed end-products of group evolution, characterized by a large magnitude gap ($\\Delta m_{1,2} \\geq 2$). However, recent observations and simulations suggest this picture is incomplete. We investigate whether FS are dynamically relaxed systems and how their galaxy populations differ from non-fossil systems (non-FS), focusing on system dynamics and evolution of the galaxies inside them. Using \\textsc{IllustrisTNG-100}, we select 182 structures ($M_{200} > 10^{13}\\,M_{\\odot}$) at $z = 0$, classifying them as FS/non-FS based "},"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":"2606.19478","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-17T18:11:47Z","cross_cats_sorted":[],"title_canon_sha256":"cb94290ee280fa39dc876ccf9f9176252ad413b8332318f7fe89027581a035a1","abstract_canon_sha256":"283e620466653bc2c667b0b71793ab29645234034fb3cc444744877add7b21c7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:12:26.852591Z","signature_b64":"Vvf8GarjHNV2RjtV8ebLacgLV0T64uQNU1b2QiaGucByd8zCY2/WKzEA6dg64xMguXfNCORhFIpgjJEH54F1DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00c207d8b0ef3563731eabbd1c930a21abc823c0cbf352bfc2634d40d9e4e271","last_reissued_at":"2026-06-19T16:12:26.852176Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:12:26.852176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Something green beneath the surface: The dynamical nature of Fossil Structures in IllustrisTNG-100","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cristian A. Vega-Mart\\'inez, Diego Pallero, Facundo A. G\\'omez, Franklin Ald\\'as, Mary Verdugo-Santos","submitted_at":"2026-06-17T18:11:47Z","abstract_excerpt":"Fossil structures (FS) have traditionally been considered dynamically relaxed end-products of group evolution, characterized by a large magnitude gap ($\\Delta m_{1,2} \\geq 2$). However, recent observations and simulations suggest this picture is incomplete. We investigate whether FS are dynamically relaxed systems and how their galaxy populations differ from non-fossil systems (non-FS), focusing on system dynamics and evolution of the galaxies inside them. Using \\textsc{IllustrisTNG-100}, we select 182 structures ($M_{200} > 10^{13}\\,M_{\\odot}$) at $z = 0$, classifying them as FS/non-FS based "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.19478","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/2606.19478/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":"2606.19478","created_at":"2026-06-19T16:12:26.852236+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.19478v1","created_at":"2026-06-19T16:12:26.852236+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.19478","created_at":"2026-06-19T16:12:26.852236+00:00"},{"alias_kind":"pith_short_12","alias_value":"ADBAPWFQ542W","created_at":"2026-06-19T16:12:26.852236+00:00"},{"alias_kind":"pith_short_16","alias_value":"ADBAPWFQ542WG4Y6","created_at":"2026-06-19T16:12:26.852236+00:00"},{"alias_kind":"pith_short_8","alias_value":"ADBAPWFQ","created_at":"2026-06-19T16:12:26.852236+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/ADBAPWFQ542WG4Y6VO6RZEYKEG","json":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG.json","graph_json":"https://pith.science/api/pith-number/ADBAPWFQ542WG4Y6VO6RZEYKEG/graph.json","events_json":"https://pith.science/api/pith-number/ADBAPWFQ542WG4Y6VO6RZEYKEG/events.json","paper":"https://pith.science/paper/ADBAPWFQ"},"agent_actions":{"view_html":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG","download_json":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG.json","view_paper":"https://pith.science/paper/ADBAPWFQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.19478&json=true","fetch_graph":"https://pith.science/api/pith-number/ADBAPWFQ542WG4Y6VO6RZEYKEG/graph.json","fetch_events":"https://pith.science/api/pith-number/ADBAPWFQ542WG4Y6VO6RZEYKEG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG/action/storage_attestation","attest_author":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG/action/author_attestation","sign_citation":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG/action/citation_signature","submit_replication":"https://pith.science/pith/ADBAPWFQ542WG4Y6VO6RZEYKEG/action/replication_record"}},"created_at":"2026-06-19T16:12:26.852236+00:00","updated_at":"2026-06-19T16:12:26.852236+00:00"}