{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:ZFLK3XLIFJ7GE5LP4DOBCJ2NNK","short_pith_number":"pith:ZFLK3XLI","schema_version":"1.0","canonical_sha256":"c956addd682a7e62756fe0dc11274d6ab6f69d5c5ea3810a548ee31d2ac296b4","source":{"kind":"arxiv","id":"1908.02972","version":1},"attestation_state":"computed","paper":{"title":"Gaia DR2 white dwarfs in the Hercules stream","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alberto Rebassa-Mansergas, Carles Cantero, H\\'ector C\\'anovas, Leandro G. Althaus, Mar\\'ia E. Camisassa, Santiago Torres, Teresa Antoja, Thomas Thelemaque","submitted_at":"2019-08-08T08:22:57Z","abstract_excerpt":"We analyzed the velocity space of the thin and thick-disk Gaia white dwarf population within 100 pc looking for signatures of the Hercules stellar stream. We aimed to identify those objects belonging to the Hercules stream and, by taking advantage of white dwarf stars as reliable cosmochronometers, to derive a first age distribution. We applied a kernel density estimation to the $UV$ velocity space of white dwarfs. For the region where a clear overdensity of stars was found, we created a 5-D space of dynamic variables. We applied a hierarchichal clustering method, HDBSCAN, to this 5-D space, i"},"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":"1908.02972","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T08:22:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"3fc7fb643e609f3293f94b8e284f6e90644af506031bdf1938244075b8626d71","abstract_canon_sha256":"d3a5462d253295f03a892ce2d848ad6018e689319a9431d672097da7b724fe74"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:00:09.945791Z","signature_b64":"cFwKTd0ZAc876Pl0ixxkDVUJBJe4+rYvvSTXLfXHW2zk4oL6/YaT2xHxTIl+84t8I0FrYbbJBN9Y06uxHCD+DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c956addd682a7e62756fe0dc11274d6ab6f69d5c5ea3810a548ee31d2ac296b4","last_reissued_at":"2026-07-05T00:00:09.945310Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:00:09.945310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gaia DR2 white dwarfs in the Hercules stream","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alberto Rebassa-Mansergas, Carles Cantero, H\\'ector C\\'anovas, Leandro G. Althaus, Mar\\'ia E. Camisassa, Santiago Torres, Teresa Antoja, Thomas Thelemaque","submitted_at":"2019-08-08T08:22:57Z","abstract_excerpt":"We analyzed the velocity space of the thin and thick-disk Gaia white dwarf population within 100 pc looking for signatures of the Hercules stellar stream. We aimed to identify those objects belonging to the Hercules stream and, by taking advantage of white dwarf stars as reliable cosmochronometers, to derive a first age distribution. We applied a kernel density estimation to the $UV$ velocity space of white dwarfs. For the region where a clear overdensity of stars was found, we created a 5-D space of dynamic variables. We applied a hierarchichal clustering method, HDBSCAN, to this 5-D space, i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02972","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/1908.02972/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":"1908.02972","created_at":"2026-07-05T00:00:09.945385+00:00"},{"alias_kind":"arxiv_version","alias_value":"1908.02972v1","created_at":"2026-07-05T00:00:09.945385+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02972","created_at":"2026-07-05T00:00:09.945385+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZFLK3XLIFJ7G","created_at":"2026-07-05T00:00:09.945385+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZFLK3XLIFJ7GE5LP","created_at":"2026-07-05T00:00:09.945385+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZFLK3XLI","created_at":"2026-07-05T00:00:09.945385+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/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK","json":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK.json","graph_json":"https://pith.science/api/pith-number/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/graph.json","events_json":"https://pith.science/api/pith-number/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/events.json","paper":"https://pith.science/paper/ZFLK3XLI"},"agent_actions":{"view_html":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK","download_json":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK.json","view_paper":"https://pith.science/paper/ZFLK3XLI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1908.02972&json=true","fetch_graph":"https://pith.science/api/pith-number/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/graph.json","fetch_events":"https://pith.science/api/pith-number/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/action/storage_attestation","attest_author":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/action/author_attestation","sign_citation":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/action/citation_signature","submit_replication":"https://pith.science/pith/ZFLK3XLIFJ7GE5LP4DOBCJ2NNK/action/replication_record"}},"created_at":"2026-07-05T00:00:09.945385+00:00","updated_at":"2026-07-05T00:00:09.945385+00:00"}