{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:YQRLZVCRHEXMLTVQDQJPKZF3CY","short_pith_number":"pith:YQRLZVCR","canonical_record":{"source":{"id":"1607.04284","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-14T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"30666aeaad6a5a4212d15f19d92650c5bcd7d8b434d94cb1050a905588f926cd","abstract_canon_sha256":"026df3e259cf39113238558d69b953bccb05bd478c11161572b639201c561d20"},"schema_version":"1.0"},"canonical_sha256":"c422bcd451392ec5ceb01c12f564bb16153a62a80c649b7084ef6dc683c21187","source":{"kind":"arxiv","id":"1607.04284","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04284","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04284v1","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04284","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"pith_short_12","alias_value":"YQRLZVCRHEXM","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YQRLZVCRHEXMLTVQ","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YQRLZVCR","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:YQRLZVCRHEXMLTVQDQJPKZF3CY","target":"record","payload":{"canonical_record":{"source":{"id":"1607.04284","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-14T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"30666aeaad6a5a4212d15f19d92650c5bcd7d8b434d94cb1050a905588f926cd","abstract_canon_sha256":"026df3e259cf39113238558d69b953bccb05bd478c11161572b639201c561d20"},"schema_version":"1.0"},"canonical_sha256":"c422bcd451392ec5ceb01c12f564bb16153a62a80c649b7084ef6dc683c21187","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:38.140987Z","signature_b64":"syAm0wHxFCp7D4yUmcF7rbIaMCfUCJlN9J4vdK67DB8zyr7DqXwR+FBpuEvNYj/4rYCT3NKVlmlZKjvsHp47AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c422bcd451392ec5ceb01c12f564bb16153a62a80c649b7084ef6dc683c21187","last_reissued_at":"2026-05-18T01:08:38.140285Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:38.140285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.04284","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":"2026-05-18T01:08:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"76QZrfdM/tR/IW3R3TU0zA17Iidjn/zr07n3PuuMYSf70fpxmGgBbI63241vesTj8AVPdIQZkE57InCDAEm7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T14:42:27.623825Z"},"content_sha256":"2f44e7dcea0db4b28ffe1de7410f8a04859463c569f5233e4ff407f5138c59b2","schema_version":"1.0","event_id":"sha256:2f44e7dcea0db4b28ffe1de7410f8a04859463c569f5233e4ff407f5138c59b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:YQRLZVCRHEXMLTVQDQJPKZF3CY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A semi-analytic dynamical friction model for cored galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alessia Gualandris, James A. Petts, Justin I. Read","submitted_at":"2016-07-14T20:00:02Z","abstract_excerpt":"We present a dynamical friction model based on Chandrasekhar's formula that reproduces the fast inspiral and stalling experienced by satellites orbiting galaxies with a large constant density core. We show that the fast inspiral phase does not owe to resonance. Rather, it owes to the background velocity distribution function for the constant density cores being dissimilar from the usually-assumed Maxwellian distribution. Using the correct background velocity distribution function and the semi-analytic model from Petts et al. (2015), we are able to correctly reproduce the infall rate in both co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04284","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":"2026-05-18T01:08:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ws1DbDvGKskn1GEeOrRjloWRuU6TekVAVnBcILDfFoyikkgZr3B7ElY1CS+BIm0P94adblTmtHmhb6s1ITuAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T14:42:27.624173Z"},"content_sha256":"9948c77210ba5e9a9db5c6e733e4c725a59365bff9d6ad6afc9348a111ad2dfb","schema_version":"1.0","event_id":"sha256:9948c77210ba5e9a9db5c6e733e4c725a59365bff9d6ad6afc9348a111ad2dfb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/bundle.json","state_url":"https://pith.science/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/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":"2026-06-02T14:42:27Z","links":{"resolver":"https://pith.science/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY","bundle":"https://pith.science/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/bundle.json","state":"https://pith.science/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YQRLZVCRHEXMLTVQDQJPKZF3CY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:YQRLZVCRHEXMLTVQDQJPKZF3CY","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":"026df3e259cf39113238558d69b953bccb05bd478c11161572b639201c561d20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-14T20:00:02Z","title_canon_sha256":"30666aeaad6a5a4212d15f19d92650c5bcd7d8b434d94cb1050a905588f926cd"},"schema_version":"1.0","source":{"id":"1607.04284","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04284","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04284v1","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04284","created_at":"2026-05-18T01:08:38Z"},{"alias_kind":"pith_short_12","alias_value":"YQRLZVCRHEXM","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YQRLZVCRHEXMLTVQ","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YQRLZVCR","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:9948c77210ba5e9a9db5c6e733e4c725a59365bff9d6ad6afc9348a111ad2dfb","target":"graph","created_at":"2026-05-18T01:08:38Z","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":"We present a dynamical friction model based on Chandrasekhar's formula that reproduces the fast inspiral and stalling experienced by satellites orbiting galaxies with a large constant density core. We show that the fast inspiral phase does not owe to resonance. Rather, it owes to the background velocity distribution function for the constant density cores being dissimilar from the usually-assumed Maxwellian distribution. Using the correct background velocity distribution function and the semi-analytic model from Petts et al. (2015), we are able to correctly reproduce the infall rate in both co","authors_text":"Alessia Gualandris, James A. Petts, Justin I. Read","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-14T20:00:02Z","title":"A semi-analytic dynamical friction model for cored galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04284","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":"sha256:2f44e7dcea0db4b28ffe1de7410f8a04859463c569f5233e4ff407f5138c59b2","target":"record","created_at":"2026-05-18T01:08:38Z","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":"026df3e259cf39113238558d69b953bccb05bd478c11161572b639201c561d20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-14T20:00:02Z","title_canon_sha256":"30666aeaad6a5a4212d15f19d92650c5bcd7d8b434d94cb1050a905588f926cd"},"schema_version":"1.0","source":{"id":"1607.04284","kind":"arxiv","version":1}},"canonical_sha256":"c422bcd451392ec5ceb01c12f564bb16153a62a80c649b7084ef6dc683c21187","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c422bcd451392ec5ceb01c12f564bb16153a62a80c649b7084ef6dc683c21187","first_computed_at":"2026-05-18T01:08:38.140285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:38.140285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"syAm0wHxFCp7D4yUmcF7rbIaMCfUCJlN9J4vdK67DB8zyr7DqXwR+FBpuEvNYj/4rYCT3NKVlmlZKjvsHp47AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:38.140987Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.04284","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f44e7dcea0db4b28ffe1de7410f8a04859463c569f5233e4ff407f5138c59b2","sha256:9948c77210ba5e9a9db5c6e733e4c725a59365bff9d6ad6afc9348a111ad2dfb"],"state_sha256":"9018bba0ead02155fbfb893ffa1f007357245e8d4fda08be811b6d19dbe33845"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xdOryUW4+J4ovK9Vj2pmbPBA8yfGoKCh98mXi81CHiwGw3yp4Sx2F3mgsXGXz/DepEjumX6qBF1D7eIUJcvtBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T14:42:27.626165Z","bundle_sha256":"b9422160e7bfb775975eb763e6ee38628313db3bbad0b4a75971425ea6506e85"}}