{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:2XRGPKMDZLNVDP42P55SXXLRPM","short_pith_number":"pith:2XRGPKMD","schema_version":"1.0","canonical_sha256":"d5e267a983cadb51bf9a7f7b2bdd717b28083d228cd19486c13e273574eb7ceb","source":{"kind":"arxiv","id":"2411.17851","version":1},"attestation_state":"computed","paper":{"title":"The VELOCE modulation zoo II. Humps and splitting patterns in spectral lines of classical Cepheids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"G. Viviani, H. Netzel, R. I. Anderson","submitted_at":"2024-11-26T20:07:45Z","abstract_excerpt":"Line splitting in spectral lines is observed in various types of stars due to phenomena such as shocks, spectroscopic binaries, magnetic fields, spots, and non-radial modes. In pulsating stars, line splitting is often attributed to pulsation-induced shocks. However, this is rarely observed in classical Cepheids, with only a few reports, including X Sagittarii and BG Crucis, where it has been linked to atmospheric shocks. We investigate line splitting in X Sgr and BG Cru using spectroscopic time series, and search for similar phenomena in other classical Cepheids. High signal-to-noise cross-cor"},"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":"2411.17851","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-11-26T20:07:45Z","cross_cats_sorted":[],"title_canon_sha256":"55a5574246ac06f009d577db65210ce4606c6bdccaa81d87e4b662ccd8f22913","abstract_canon_sha256":"5b0ee7657ef310f7431f4ab34ec8727bde6b9c2987ee2d28ae2f5bee58f63b06"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:16:17.228426Z","signature_b64":"5QuNs2R1a/FPn/NtKMBvibniOXJKqz6+zxOHZ754pyDtLoljkCRz6Um0pbnBf2STkBI7ygpUIE7VKxWnHnSAAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5e267a983cadb51bf9a7f7b2bdd717b28083d228cd19486c13e273574eb7ceb","last_reissued_at":"2026-07-05T10:16:17.227914Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:16:17.227914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The VELOCE modulation zoo II. Humps and splitting patterns in spectral lines of classical Cepheids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"G. Viviani, H. Netzel, R. I. Anderson","submitted_at":"2024-11-26T20:07:45Z","abstract_excerpt":"Line splitting in spectral lines is observed in various types of stars due to phenomena such as shocks, spectroscopic binaries, magnetic fields, spots, and non-radial modes. In pulsating stars, line splitting is often attributed to pulsation-induced shocks. However, this is rarely observed in classical Cepheids, with only a few reports, including X Sagittarii and BG Crucis, where it has been linked to atmospheric shocks. We investigate line splitting in X Sgr and BG Cru using spectroscopic time series, and search for similar phenomena in other classical Cepheids. High signal-to-noise cross-cor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.17851","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/2411.17851/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":"2411.17851","created_at":"2026-07-05T10:16:17.227980+00:00"},{"alias_kind":"arxiv_version","alias_value":"2411.17851v1","created_at":"2026-07-05T10:16:17.227980+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.17851","created_at":"2026-07-05T10:16:17.227980+00:00"},{"alias_kind":"pith_short_12","alias_value":"2XRGPKMDZLNV","created_at":"2026-07-05T10:16:17.227980+00:00"},{"alias_kind":"pith_short_16","alias_value":"2XRGPKMDZLNVDP42","created_at":"2026-07-05T10:16:17.227980+00:00"},{"alias_kind":"pith_short_8","alias_value":"2XRGPKMD","created_at":"2026-07-05T10:16:17.227980+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/2XRGPKMDZLNVDP42P55SXXLRPM","json":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM.json","graph_json":"https://pith.science/api/pith-number/2XRGPKMDZLNVDP42P55SXXLRPM/graph.json","events_json":"https://pith.science/api/pith-number/2XRGPKMDZLNVDP42P55SXXLRPM/events.json","paper":"https://pith.science/paper/2XRGPKMD"},"agent_actions":{"view_html":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM","download_json":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM.json","view_paper":"https://pith.science/paper/2XRGPKMD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2411.17851&json=true","fetch_graph":"https://pith.science/api/pith-number/2XRGPKMDZLNVDP42P55SXXLRPM/graph.json","fetch_events":"https://pith.science/api/pith-number/2XRGPKMDZLNVDP42P55SXXLRPM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM/action/storage_attestation","attest_author":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM/action/author_attestation","sign_citation":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM/action/citation_signature","submit_replication":"https://pith.science/pith/2XRGPKMDZLNVDP42P55SXXLRPM/action/replication_record"}},"created_at":"2026-07-05T10:16:17.227980+00:00","updated_at":"2026-07-05T10:16:17.227980+00:00"}