{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:J6ERN2YOLJCHB4L7YCGXYSFZIQ","short_pith_number":"pith:J6ERN2YO","schema_version":"1.0","canonical_sha256":"4f8916eb0e5a4470f17fc08d7c48b94436aa44e8cde38f7cac2b46a122fe6e7f","source":{"kind":"arxiv","id":"1305.2195","version":2},"attestation_state":"computed","paper":{"title":"Following the flow: tracer particles in astrophysical fluid simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","physics.flu-dyn"],"primary_cat":"astro-ph.IM","authors_text":"Debora Sijacki, Dylan Nelson, Lars Hernquist, Mark Vogelsberger, Shy Genel, Volker Springel","submitted_at":"2013-05-09T20:00:00Z","abstract_excerpt":"We present two numerical schemes for passive tracer particles in the hydrodynamical moving-mesh code AREPO, and compare their performance for various problems, from simple setups to cosmological simulations. The purpose of tracer particles is to allow the flow to be followed in a Lagrangian way, tracing the evolution of the fluid with time, and allowing the thermodynamical history of individual fluid parcels to be recorded. We find that the commonly-used `velocity field tracers', which are advected using the fluid velocity field, do not in general follow the mass flow correctly, and explain wh"},"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":"1305.2195","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-09T20:00:00Z","cross_cats_sorted":["astro-ph.CO","physics.flu-dyn"],"title_canon_sha256":"e89d372ddcfe71fda6ac6db914c8821973e44827e8d3c8c6544f5fecb6edb7ab","abstract_canon_sha256":"bcb762e21a40d7786692a3bf526898a32ac18e49b00fcd17cb11b18eeea978b9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:43.170637Z","signature_b64":"xwC3Ni9JoWBGeDiYROxvfaukIyvRLZzggNuimjhhKJJZrVFTKpERkizF6EaonrJsPgGd+6yjpHAd4tsJmU9eAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f8916eb0e5a4470f17fc08d7c48b94436aa44e8cde38f7cac2b46a122fe6e7f","last_reissued_at":"2026-05-18T03:15:43.169924Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:43.169924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Following the flow: tracer particles in astrophysical fluid simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","physics.flu-dyn"],"primary_cat":"astro-ph.IM","authors_text":"Debora Sijacki, Dylan Nelson, Lars Hernquist, Mark Vogelsberger, Shy Genel, Volker Springel","submitted_at":"2013-05-09T20:00:00Z","abstract_excerpt":"We present two numerical schemes for passive tracer particles in the hydrodynamical moving-mesh code AREPO, and compare their performance for various problems, from simple setups to cosmological simulations. The purpose of tracer particles is to allow the flow to be followed in a Lagrangian way, tracing the evolution of the fluid with time, and allowing the thermodynamical history of individual fluid parcels to be recorded. We find that the commonly-used `velocity field tracers', which are advected using the fluid velocity field, do not in general follow the mass flow correctly, and explain wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.2195","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":""},"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":"1305.2195","created_at":"2026-05-18T03:15:43.170033+00:00"},{"alias_kind":"arxiv_version","alias_value":"1305.2195v2","created_at":"2026-05-18T03:15:43.170033+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.2195","created_at":"2026-05-18T03:15:43.170033+00:00"},{"alias_kind":"pith_short_12","alias_value":"J6ERN2YOLJCH","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_16","alias_value":"J6ERN2YOLJCHB4L7","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_8","alias_value":"J6ERN2YO","created_at":"2026-05-18T12:27:49.015174+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/J6ERN2YOLJCHB4L7YCGXYSFZIQ","json":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ.json","graph_json":"https://pith.science/api/pith-number/J6ERN2YOLJCHB4L7YCGXYSFZIQ/graph.json","events_json":"https://pith.science/api/pith-number/J6ERN2YOLJCHB4L7YCGXYSFZIQ/events.json","paper":"https://pith.science/paper/J6ERN2YO"},"agent_actions":{"view_html":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ","download_json":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ.json","view_paper":"https://pith.science/paper/J6ERN2YO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1305.2195&json=true","fetch_graph":"https://pith.science/api/pith-number/J6ERN2YOLJCHB4L7YCGXYSFZIQ/graph.json","fetch_events":"https://pith.science/api/pith-number/J6ERN2YOLJCHB4L7YCGXYSFZIQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ/action/storage_attestation","attest_author":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ/action/author_attestation","sign_citation":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ/action/citation_signature","submit_replication":"https://pith.science/pith/J6ERN2YOLJCHB4L7YCGXYSFZIQ/action/replication_record"}},"created_at":"2026-05-18T03:15:43.170033+00:00","updated_at":"2026-05-18T03:15:43.170033+00:00"}