{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:VGL2K3AL7R3WKQ2TET76IHVCT2","short_pith_number":"pith:VGL2K3AL","schema_version":"1.0","canonical_sha256":"a997a56c0bfc7765435324ffe41ea29ebde47afd2355c572750e521fbd094f28","source":{"kind":"arxiv","id":"1901.03344","version":3},"attestation_state":"computed","paper":{"title":"Constraining First Star Formation with 21cm-Cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Anna T. P. Schauer, Boyuan Liu, Volker Bromm","submitted_at":"2019-01-10T19:00:10Z","abstract_excerpt":"Within standard $\\Lambda$CDM cosmology, Population III (Pop III) star formation in minihalos of mass $M_\\mathrm{halo}\\gtrsim 5\\times10^5$ M$_\\odot$ provides the first stellar sources of Lyman$\\alpha$ (Ly$\\alpha$) photons. The Experiment to Detect the Global Epoch of Reionization Signature (EDGES) has measured a strong absorption signal of the redshifted 21 cm radiation from neutral hydrogen at $z\\approx 17$, requiring efficient formation of massive stars before then. In this paper, we investigate whether star formation in minihalos plays a significant role in establishing the early Ly$\\alpha$ "},"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":"1901.03344","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-10T19:00:10Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"5cf46325d0c2eca27c208d184b4c12741702f8d5fcf31e5ab1033475925f8cad","abstract_canon_sha256":"deede7d2f593e06902e97f5fc06fcb1441adba2d6c0e89c861ec7e40d7ed2561"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:57.828767Z","signature_b64":"+JJRQzQ4VxvQjUjSIwodOprX3Ew+phjeYxVcF0FCs2NGr76yxSHr8bqmkNELSR3UDq15t1fL28VbRKyvgRO/Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a997a56c0bfc7765435324ffe41ea29ebde47afd2355c572750e521fbd094f28","last_reissued_at":"2026-05-17T23:44:57.828184Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:57.828184Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Constraining First Star Formation with 21cm-Cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Anna T. P. Schauer, Boyuan Liu, Volker Bromm","submitted_at":"2019-01-10T19:00:10Z","abstract_excerpt":"Within standard $\\Lambda$CDM cosmology, Population III (Pop III) star formation in minihalos of mass $M_\\mathrm{halo}\\gtrsim 5\\times10^5$ M$_\\odot$ provides the first stellar sources of Lyman$\\alpha$ (Ly$\\alpha$) photons. The Experiment to Detect the Global Epoch of Reionization Signature (EDGES) has measured a strong absorption signal of the redshifted 21 cm radiation from neutral hydrogen at $z\\approx 17$, requiring efficient formation of massive stars before then. In this paper, we investigate whether star formation in minihalos plays a significant role in establishing the early Ly$\\alpha$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03344","kind":"arxiv","version":3},"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":"1901.03344","created_at":"2026-05-17T23:44:57.828266+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.03344v3","created_at":"2026-05-17T23:44:57.828266+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03344","created_at":"2026-05-17T23:44:57.828266+00:00"},{"alias_kind":"pith_short_12","alias_value":"VGL2K3AL7R3W","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_16","alias_value":"VGL2K3AL7R3WKQ2T","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_8","alias_value":"VGL2K3AL","created_at":"2026-05-18T12:33:30.264802+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/VGL2K3AL7R3WKQ2TET76IHVCT2","json":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2.json","graph_json":"https://pith.science/api/pith-number/VGL2K3AL7R3WKQ2TET76IHVCT2/graph.json","events_json":"https://pith.science/api/pith-number/VGL2K3AL7R3WKQ2TET76IHVCT2/events.json","paper":"https://pith.science/paper/VGL2K3AL"},"agent_actions":{"view_html":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2","download_json":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2.json","view_paper":"https://pith.science/paper/VGL2K3AL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.03344&json=true","fetch_graph":"https://pith.science/api/pith-number/VGL2K3AL7R3WKQ2TET76IHVCT2/graph.json","fetch_events":"https://pith.science/api/pith-number/VGL2K3AL7R3WKQ2TET76IHVCT2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2/action/storage_attestation","attest_author":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2/action/author_attestation","sign_citation":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2/action/citation_signature","submit_replication":"https://pith.science/pith/VGL2K3AL7R3WKQ2TET76IHVCT2/action/replication_record"}},"created_at":"2026-05-17T23:44:57.828266+00:00","updated_at":"2026-05-17T23:44:57.828266+00:00"}