{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:C36QDKP5ABZ52MW4U53OMFU747","short_pith_number":"pith:C36QDKP5","canonical_record":{"source":{"id":"1308.4370","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-20T18:37:53Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ac19398f9e84a1aa23e87c126017dd7086bcf7ce9a69d46fec7cf34625b3235f","abstract_canon_sha256":"394d4252c58d1794bed25d4eee60723c06663ce8df893a1189e2cc59290871ba"},"schema_version":"1.0"},"canonical_sha256":"16fd01a9fd0073dd32dca776e6169fe7fb2eaf7976e37ee1a0251a4d5396a633","source":{"kind":"arxiv","id":"1308.4370","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4370","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4370v1","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4370","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"pith_short_12","alias_value":"C36QDKP5ABZ5","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"C36QDKP5ABZ52MW4","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"C36QDKP5","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:C36QDKP5ABZ52MW4U53OMFU747","target":"record","payload":{"canonical_record":{"source":{"id":"1308.4370","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-20T18:37:53Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ac19398f9e84a1aa23e87c126017dd7086bcf7ce9a69d46fec7cf34625b3235f","abstract_canon_sha256":"394d4252c58d1794bed25d4eee60723c06663ce8df893a1189e2cc59290871ba"},"schema_version":"1.0"},"canonical_sha256":"16fd01a9fd0073dd32dca776e6169fe7fb2eaf7976e37ee1a0251a4d5396a633","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:07.629658Z","signature_b64":"Nr1HWur29mf7lWb8yUIjCMMPhm5+t9HRctRXgDr9fyIN7WOwjswSRZYLaUAgEw0HXuIletvHWe33aHTQBOnGBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16fd01a9fd0073dd32dca776e6169fe7fb2eaf7976e37ee1a0251a4d5396a633","last_reissued_at":"2026-05-18T01:48:07.628995Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:07.628995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.4370","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u0rMeSr+N3QmI6zqgXyu3zz8uAySU07wd4aTP0+yyjZLtlBGNAUrMa/93wCRgQq4LTR2rw/zDjVWWC5haL6DBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:01:24.768592Z"},"content_sha256":"0f869330ca6e205f7f62e8de33b9695eea1eee861a70d7996dc92dba8647aa11","schema_version":"1.0","event_id":"sha256:0f869330ca6e205f7f62e8de33b9695eea1eee861a70d7996dc92dba8647aa11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:C36QDKP5ABZ52MW4U53OMFU747","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The gravitational drag force on an extended object moving in a gas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"C. G. Bernal, F. J. Sanchez-Salcedo","submitted_at":"2013-08-20T18:37:53Z","abstract_excerpt":"Using axisymmetrical numerical simulations, we revisit the gravitational drag felt by a gravitational Plummer sphere with mass M and core radius Rs, moving at constant velocity V0 through a background homogeneous medium of adiabatic gas. Since the potential is non-diverging, there is no gas removal due to accretion. When Rs is larger than the Bondi radius RB, the perturbation is linear at every point and the drag force is well fitted by the time-dependent Ostriker's formula with r_{min}= 2.25Rs, where r_{min} is the minimum impact parameter in the Coulomb logarithm. In the deep nonlinear super"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4370","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GZC/uF6QsRUjN8CjBY7epfGlmM6qt8uWV/ZKpDSxfGJOI58bp4KYxAjEdsLVu3Z4K+c1oOo0MzVrf2pzToLDCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:01:24.768977Z"},"content_sha256":"4eb831753141d7824b83a85a94c64ec524f2df23be21063ec6c6c60dd501a569","schema_version":"1.0","event_id":"sha256:4eb831753141d7824b83a85a94c64ec524f2df23be21063ec6c6c60dd501a569"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C36QDKP5ABZ52MW4U53OMFU747/bundle.json","state_url":"https://pith.science/pith/C36QDKP5ABZ52MW4U53OMFU747/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C36QDKP5ABZ52MW4U53OMFU747/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T07:01:24Z","links":{"resolver":"https://pith.science/pith/C36QDKP5ABZ52MW4U53OMFU747","bundle":"https://pith.science/pith/C36QDKP5ABZ52MW4U53OMFU747/bundle.json","state":"https://pith.science/pith/C36QDKP5ABZ52MW4U53OMFU747/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C36QDKP5ABZ52MW4U53OMFU747/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:C36QDKP5ABZ52MW4U53OMFU747","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"394d4252c58d1794bed25d4eee60723c06663ce8df893a1189e2cc59290871ba","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-20T18:37:53Z","title_canon_sha256":"ac19398f9e84a1aa23e87c126017dd7086bcf7ce9a69d46fec7cf34625b3235f"},"schema_version":"1.0","source":{"id":"1308.4370","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4370","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4370v1","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4370","created_at":"2026-05-18T01:48:07Z"},{"alias_kind":"pith_short_12","alias_value":"C36QDKP5ABZ5","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"C36QDKP5ABZ52MW4","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"C36QDKP5","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:4eb831753141d7824b83a85a94c64ec524f2df23be21063ec6c6c60dd501a569","target":"graph","created_at":"2026-05-18T01:48:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Using axisymmetrical numerical simulations, we revisit the gravitational drag felt by a gravitational Plummer sphere with mass M and core radius Rs, moving at constant velocity V0 through a background homogeneous medium of adiabatic gas. Since the potential is non-diverging, there is no gas removal due to accretion. When Rs is larger than the Bondi radius RB, the perturbation is linear at every point and the drag force is well fitted by the time-dependent Ostriker's formula with r_{min}= 2.25Rs, where r_{min} is the minimum impact parameter in the Coulomb logarithm. In the deep nonlinear super","authors_text":"C. G. Bernal, F. J. Sanchez-Salcedo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-20T18:37:53Z","title":"The gravitational drag force on an extended object moving in a gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4370","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0f869330ca6e205f7f62e8de33b9695eea1eee861a70d7996dc92dba8647aa11","target":"record","created_at":"2026-05-18T01:48:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"394d4252c58d1794bed25d4eee60723c06663ce8df893a1189e2cc59290871ba","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-20T18:37:53Z","title_canon_sha256":"ac19398f9e84a1aa23e87c126017dd7086bcf7ce9a69d46fec7cf34625b3235f"},"schema_version":"1.0","source":{"id":"1308.4370","kind":"arxiv","version":1}},"canonical_sha256":"16fd01a9fd0073dd32dca776e6169fe7fb2eaf7976e37ee1a0251a4d5396a633","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16fd01a9fd0073dd32dca776e6169fe7fb2eaf7976e37ee1a0251a4d5396a633","first_computed_at":"2026-05-18T01:48:07.628995Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:07.628995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nr1HWur29mf7lWb8yUIjCMMPhm5+t9HRctRXgDr9fyIN7WOwjswSRZYLaUAgEw0HXuIletvHWe33aHTQBOnGBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:07.629658Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.4370","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0f869330ca6e205f7f62e8de33b9695eea1eee861a70d7996dc92dba8647aa11","sha256:4eb831753141d7824b83a85a94c64ec524f2df23be21063ec6c6c60dd501a569"],"state_sha256":"7e571d7ba509dd922c3920ba4b3481e5c1f8de46a680193bb03407c09ba06d1c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SdRdfY/wE8eoPPid7cfCZKgkRUJlkuu+1wJdVXYzF0R6UrHsOr7GABDv1iQW3OXSzH2Dmt9CGD9P/Tli3nMpAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:01:24.770937Z","bundle_sha256":"9103c2f1866fca7587cb6f549c49c5b9e03e7b2abdeaaf6f788d80eb09a73db7"}}