{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:QTFP2MY7FUGFIEG4LG4YUYRGEN","short_pith_number":"pith:QTFP2MY7","schema_version":"1.0","canonical_sha256":"84cafd331f2d0c5410dc59b98a62262344885fe7874f9c9c4eda22269ff98a76","source":{"kind":"arxiv","id":"1502.06426","version":1},"attestation_state":"computed","paper":{"title":"Properties of the Molecular Cores of Low Luminosity Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Arnaud Belloche, Chao-Ling Hung, Friedrich Wyrowski, Shih-Ping Lai, Tien-Hao Hsieh","submitted_at":"2015-02-23T13:50:45Z","abstract_excerpt":"We present a survey toward 16 Low Luminosity Objects (LLOs with an internal luminosity, Lint, lower than 0.2 Lsun) with N2H+ (1-0), N2H+ (3-2), N2D+ (3-2), HCO+ (3-2) and HCN (3-2) using the Arizona Radio Observatory Kitt Peak 12m Telescope and Submillimeter Telescope. Our goal is to probe the nature of these faint protostars which are believed to be either very low mass or extremely young protostars. We find that the N2D+/N2H+ column density ratios of LLOs are similar to those of typical starless cores and Class 0 objects. The N2D+/N2H+ column density ratios are relatively high (> 0.05) for L"},"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":"1502.06426","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-23T13:50:45Z","cross_cats_sorted":[],"title_canon_sha256":"af6e4d45a8e06945dc8e1ef56860703f3366e586e3ba52feb26ae40f015140f7","abstract_canon_sha256":"66762b5bb148d8f5adff33fea1b7a91dbc5f8d70a035f18e8d84ee8c2ec32230"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:55.000770Z","signature_b64":"uZtsIt4HYDbigC+HYAgdT2YBz5kI54V6p7JzmZfKqX5WxtQ9y2DzJOTI9yBSqSpaNOvd0m+uEfnrl5xC25+2Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84cafd331f2d0c5410dc59b98a62262344885fe7874f9c9c4eda22269ff98a76","last_reissued_at":"2026-05-18T01:40:55.000040Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:55.000040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Properties of the Molecular Cores of Low Luminosity Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Arnaud Belloche, Chao-Ling Hung, Friedrich Wyrowski, Shih-Ping Lai, Tien-Hao Hsieh","submitted_at":"2015-02-23T13:50:45Z","abstract_excerpt":"We present a survey toward 16 Low Luminosity Objects (LLOs with an internal luminosity, Lint, lower than 0.2 Lsun) with N2H+ (1-0), N2H+ (3-2), N2D+ (3-2), HCO+ (3-2) and HCN (3-2) using the Arizona Radio Observatory Kitt Peak 12m Telescope and Submillimeter Telescope. Our goal is to probe the nature of these faint protostars which are believed to be either very low mass or extremely young protostars. We find that the N2D+/N2H+ column density ratios of LLOs are similar to those of typical starless cores and Class 0 objects. The N2D+/N2H+ column density ratios are relatively high (> 0.05) for L"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.06426","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1502.06426","created_at":"2026-05-18T01:40:55.000161+00:00"},{"alias_kind":"arxiv_version","alias_value":"1502.06426v1","created_at":"2026-05-18T01:40:55.000161+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.06426","created_at":"2026-05-18T01:40:55.000161+00:00"},{"alias_kind":"pith_short_12","alias_value":"QTFP2MY7FUGF","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_16","alias_value":"QTFP2MY7FUGFIEG4","created_at":"2026-05-18T12:29:37.295048+00:00"},{"alias_kind":"pith_short_8","alias_value":"QTFP2MY7","created_at":"2026-05-18T12:29:37.295048+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/QTFP2MY7FUGFIEG4LG4YUYRGEN","json":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN.json","graph_json":"https://pith.science/api/pith-number/QTFP2MY7FUGFIEG4LG4YUYRGEN/graph.json","events_json":"https://pith.science/api/pith-number/QTFP2MY7FUGFIEG4LG4YUYRGEN/events.json","paper":"https://pith.science/paper/QTFP2MY7"},"agent_actions":{"view_html":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN","download_json":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN.json","view_paper":"https://pith.science/paper/QTFP2MY7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1502.06426&json=true","fetch_graph":"https://pith.science/api/pith-number/QTFP2MY7FUGFIEG4LG4YUYRGEN/graph.json","fetch_events":"https://pith.science/api/pith-number/QTFP2MY7FUGFIEG4LG4YUYRGEN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN/action/storage_attestation","attest_author":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN/action/author_attestation","sign_citation":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN/action/citation_signature","submit_replication":"https://pith.science/pith/QTFP2MY7FUGFIEG4LG4YUYRGEN/action/replication_record"}},"created_at":"2026-05-18T01:40:55.000161+00:00","updated_at":"2026-05-18T01:40:55.000161+00:00"}