{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:FUJM4JPALFU6J5HIFAXCJWSBS7","short_pith_number":"pith:FUJM4JPA","schema_version":"1.0","canonical_sha256":"2d12ce25e05969e4f4e8282e24da4197d56709bc5f23f8e4e60626fea0ff6f2b","source":{"kind":"arxiv","id":"1601.07575","version":2},"attestation_state":"computed","paper":{"title":"H-alpha as a Luminosity Class Diagnostic for K- and M-type Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Emily M. Levesque, Jeff Jennings","submitted_at":"2016-01-27T21:31:37Z","abstract_excerpt":"We have identified the H-alpha absorption feature as a new spectroscopic diagnostic of luminosity class in K- and M-type stars. From high-resolution spectra of 19 stars with well-determined physical properties (including effective temperatures and stellar radii), we measured equivalent widths for H-alpha and the Ca II triplet and examined their dependence on both luminosity class and stellar radius. H-alpha shows a strong relation with both luminosity class and radius that extends down to late M spectral types. This behavior in H-alpha has been predicted as a result of the density-dependent ov"},"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":"1601.07575","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-27T21:31:37Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"07187fad4d58bda637ef3ebe322f0462a259c2aa23d33b96aba6c841cf8b5d43","abstract_canon_sha256":"047cf3e8c0a640bdd909b2a1a2533509558f3498fc4fd30c8faca4d30ead8192"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:42.744382Z","signature_b64":"Agr43Rp/+BnopCGRt6hiZ19LR4Hlqyv6EU+nv64NCCMtdHi8L7T79P4+pAO+U0xBBvns2LdNp3lPtOaB+kfKAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d12ce25e05969e4f4e8282e24da4197d56709bc5f23f8e4e60626fea0ff6f2b","last_reissued_at":"2026-05-18T01:15:42.743610Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:42.743610Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"H-alpha as a Luminosity Class Diagnostic for K- and M-type Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Emily M. Levesque, Jeff Jennings","submitted_at":"2016-01-27T21:31:37Z","abstract_excerpt":"We have identified the H-alpha absorption feature as a new spectroscopic diagnostic of luminosity class in K- and M-type stars. From high-resolution spectra of 19 stars with well-determined physical properties (including effective temperatures and stellar radii), we measured equivalent widths for H-alpha and the Ca II triplet and examined their dependence on both luminosity class and stellar radius. H-alpha shows a strong relation with both luminosity class and radius that extends down to late M spectral types. This behavior in H-alpha has been predicted as a result of the density-dependent ov"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.07575","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1601.07575","created_at":"2026-05-18T01:15:42.743730+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.07575v2","created_at":"2026-05-18T01:15:42.743730+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.07575","created_at":"2026-05-18T01:15:42.743730+00:00"},{"alias_kind":"pith_short_12","alias_value":"FUJM4JPALFU6","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_16","alias_value":"FUJM4JPALFU6J5HI","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_8","alias_value":"FUJM4JPA","created_at":"2026-05-18T12:30:15.759754+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/FUJM4JPALFU6J5HIFAXCJWSBS7","json":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7.json","graph_json":"https://pith.science/api/pith-number/FUJM4JPALFU6J5HIFAXCJWSBS7/graph.json","events_json":"https://pith.science/api/pith-number/FUJM4JPALFU6J5HIFAXCJWSBS7/events.json","paper":"https://pith.science/paper/FUJM4JPA"},"agent_actions":{"view_html":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7","download_json":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7.json","view_paper":"https://pith.science/paper/FUJM4JPA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.07575&json=true","fetch_graph":"https://pith.science/api/pith-number/FUJM4JPALFU6J5HIFAXCJWSBS7/graph.json","fetch_events":"https://pith.science/api/pith-number/FUJM4JPALFU6J5HIFAXCJWSBS7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7/action/storage_attestation","attest_author":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7/action/author_attestation","sign_citation":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7/action/citation_signature","submit_replication":"https://pith.science/pith/FUJM4JPALFU6J5HIFAXCJWSBS7/action/replication_record"}},"created_at":"2026-05-18T01:15:42.743730+00:00","updated_at":"2026-05-18T01:15:42.743730+00:00"}