{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:WO6NGQ2TQH45WC5C4NHMNQHZSJ","short_pith_number":"pith:WO6NGQ2T","schema_version":"1.0","canonical_sha256":"b3bcd3435381f9db0ba2e34ec6c0f9924dcc3449800718f9e5f0a9133b8056bf","source":{"kind":"arxiv","id":"1907.06348","version":1},"attestation_state":"computed","paper":{"title":"New nearby hypervelocity stars and their spatial distribution from Gaia DR2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cuihua Du, Hefan Li, Heidi Jo Newberg, Jianrong Shi, Jun Ma, Yepeng Yan, Yuqin Chen, Zhenyu Wu","submitted_at":"2019-07-15T06:48:03Z","abstract_excerpt":"Base on about 4,500 large tangential velocity ($V_\\mathrm{tan}>0.75V_\\mathrm{esc}$) with high-precision proper motions and $5\\sigma$ parallaxes in Gaia DR2 5D information derived from parallax and proper motion, we identify more than 600 high velocity stars with $50\\%$ unbound probability. Of these, 28 nearby (less than 6 kpc) late-type Hypervelocity stars (HVSs) with over $99\\%$ possibility of unbound are discovered. In order to search for the unbound stars from the full Gaia DR2 6D phase space information derived from parallax, proper motion and radial velocity, we also identify 28 stars fro"},"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":"1907.06348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-15T06:48:03Z","cross_cats_sorted":[],"title_canon_sha256":"96d2601a368461fdf7b29d1c8eec696fe976e73eae19b0bb489091a3cfe3db75","abstract_canon_sha256":"6e0606fb03089f5c6d9418a662aa22ec1a7acaa1644ff24fe8d55a536300525d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:01:59.682159Z","signature_b64":"dzjDExCFSNeQigu8W70eeIQOkI13WelPEtdvvZ4vjX/mKQAAdKi4TL/VWQVkAAOZAE93XxH2vEsqZenw/3ykDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b3bcd3435381f9db0ba2e34ec6c0f9924dcc3449800718f9e5f0a9133b8056bf","last_reissued_at":"2026-07-05T00:01:59.681662Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:01:59.681662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"New nearby hypervelocity stars and their spatial distribution from Gaia DR2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cuihua Du, Hefan Li, Heidi Jo Newberg, Jianrong Shi, Jun Ma, Yepeng Yan, Yuqin Chen, Zhenyu Wu","submitted_at":"2019-07-15T06:48:03Z","abstract_excerpt":"Base on about 4,500 large tangential velocity ($V_\\mathrm{tan}>0.75V_\\mathrm{esc}$) with high-precision proper motions and $5\\sigma$ parallaxes in Gaia DR2 5D information derived from parallax and proper motion, we identify more than 600 high velocity stars with $50\\%$ unbound probability. Of these, 28 nearby (less than 6 kpc) late-type Hypervelocity stars (HVSs) with over $99\\%$ possibility of unbound are discovered. In order to search for the unbound stars from the full Gaia DR2 6D phase space information derived from parallax, proper motion and radial velocity, we also identify 28 stars fro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.06348","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/1907.06348/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":"1907.06348","created_at":"2026-07-05T00:01:59.681723+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.06348v1","created_at":"2026-07-05T00:01:59.681723+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.06348","created_at":"2026-07-05T00:01:59.681723+00:00"},{"alias_kind":"pith_short_12","alias_value":"WO6NGQ2TQH45","created_at":"2026-07-05T00:01:59.681723+00:00"},{"alias_kind":"pith_short_16","alias_value":"WO6NGQ2TQH45WC5C","created_at":"2026-07-05T00:01:59.681723+00:00"},{"alias_kind":"pith_short_8","alias_value":"WO6NGQ2T","created_at":"2026-07-05T00:01:59.681723+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/WO6NGQ2TQH45WC5C4NHMNQHZSJ","json":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ.json","graph_json":"https://pith.science/api/pith-number/WO6NGQ2TQH45WC5C4NHMNQHZSJ/graph.json","events_json":"https://pith.science/api/pith-number/WO6NGQ2TQH45WC5C4NHMNQHZSJ/events.json","paper":"https://pith.science/paper/WO6NGQ2T"},"agent_actions":{"view_html":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ","download_json":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ.json","view_paper":"https://pith.science/paper/WO6NGQ2T","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.06348&json=true","fetch_graph":"https://pith.science/api/pith-number/WO6NGQ2TQH45WC5C4NHMNQHZSJ/graph.json","fetch_events":"https://pith.science/api/pith-number/WO6NGQ2TQH45WC5C4NHMNQHZSJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ/action/storage_attestation","attest_author":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ/action/author_attestation","sign_citation":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ/action/citation_signature","submit_replication":"https://pith.science/pith/WO6NGQ2TQH45WC5C4NHMNQHZSJ/action/replication_record"}},"created_at":"2026-07-05T00:01:59.681723+00:00","updated_at":"2026-07-05T00:01:59.681723+00:00"}