{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:VUV2CZD2NUNPNPEMQBAMHPFXZF","short_pith_number":"pith:VUV2CZD2","schema_version":"1.0","canonical_sha256":"ad2ba1647a6d1af6bc8c8040c3bcb7c942ab27cfe4405052b690091de8ab07e8","source":{"kind":"arxiv","id":"2607.21034","version":1},"attestation_state":"computed","paper":{"title":"A RELHIC twin candidate near the galaxy M51","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cheng cheng, Chen Xu, Jie Wang, Qingze Chen, Tiantian Liang, Wei Du, Yingjie Jing, Yiwei Xu, Zerui Liu, Zhipeng Hou","submitted_at":"2026-07-23T08:16:48Z","abstract_excerpt":"We report the discovery of a pair of H I clouds near M51 (NGC 5194) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These clouds have no optical counterparts and are potential candidates for Reionization-Limited H I Clouds (RELHICs).\n  We search for compact H I sources in deep FEASTS observations using SoFiA and remove objects with optical counterparts through cross-matching with the DESI Legacy Imaging Surveys. The remaining candidates are modelled as hydrostatic H I structures embedded in Navarro-Frenk-White dark matter haloes and compared with RELHIC predictions and "},"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":"2607.21034","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-23T08:16:48Z","cross_cats_sorted":[],"title_canon_sha256":"d90b8be089f498836149a1ec042999c086d4b9e67985c0dae53292a05e45f1d1","abstract_canon_sha256":"3ec02d6236df7f1b21185df94c39342a6510c160a5eb36eddc967c179fdde97f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-24T01:23:48.461829Z","signature_b64":"JGy+dOK+M6pvoIDI+eOWPbBEvaBM2q81wDRTa11agAgsWueaAiPuxZPQvumZsSGeXMKZlp/5oDki3XUGIXr/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad2ba1647a6d1af6bc8c8040c3bcb7c942ab27cfe4405052b690091de8ab07e8","last_reissued_at":"2026-07-24T01:23:48.460900Z","signature_status":"signed_v1","first_computed_at":"2026-07-24T01:23:48.460900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A RELHIC twin candidate near the galaxy M51","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cheng cheng, Chen Xu, Jie Wang, Qingze Chen, Tiantian Liang, Wei Du, Yingjie Jing, Yiwei Xu, Zerui Liu, Zhipeng Hou","submitted_at":"2026-07-23T08:16:48Z","abstract_excerpt":"We report the discovery of a pair of H I clouds near M51 (NGC 5194) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These clouds have no optical counterparts and are potential candidates for Reionization-Limited H I Clouds (RELHICs).\n  We search for compact H I sources in deep FEASTS observations using SoFiA and remove objects with optical counterparts through cross-matching with the DESI Legacy Imaging Surveys. The remaining candidates are modelled as hydrostatic H I structures embedded in Navarro-Frenk-White dark matter haloes and compared with RELHIC predictions and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21034","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/2607.21034/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":"2607.21034","created_at":"2026-07-24T01:23:48.461341+00:00"},{"alias_kind":"arxiv_version","alias_value":"2607.21034v1","created_at":"2026-07-24T01:23:48.461341+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21034","created_at":"2026-07-24T01:23:48.461341+00:00"},{"alias_kind":"pith_short_12","alias_value":"VUV2CZD2NUNP","created_at":"2026-07-24T01:23:48.461341+00:00"},{"alias_kind":"pith_short_16","alias_value":"VUV2CZD2NUNPNPEM","created_at":"2026-07-24T01:23:48.461341+00:00"},{"alias_kind":"pith_short_8","alias_value":"VUV2CZD2","created_at":"2026-07-24T01:23:48.461341+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/VUV2CZD2NUNPNPEMQBAMHPFXZF","json":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF.json","graph_json":"https://pith.science/api/pith-number/VUV2CZD2NUNPNPEMQBAMHPFXZF/graph.json","events_json":"https://pith.science/api/pith-number/VUV2CZD2NUNPNPEMQBAMHPFXZF/events.json","paper":"https://pith.science/paper/VUV2CZD2"},"agent_actions":{"view_html":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF","download_json":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF.json","view_paper":"https://pith.science/paper/VUV2CZD2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2607.21034&json=true","fetch_graph":"https://pith.science/api/pith-number/VUV2CZD2NUNPNPEMQBAMHPFXZF/graph.json","fetch_events":"https://pith.science/api/pith-number/VUV2CZD2NUNPNPEMQBAMHPFXZF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF/action/storage_attestation","attest_author":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF/action/author_attestation","sign_citation":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF/action/citation_signature","submit_replication":"https://pith.science/pith/VUV2CZD2NUNPNPEMQBAMHPFXZF/action/replication_record"}},"created_at":"2026-07-24T01:23:48.461341+00:00","updated_at":"2026-07-24T01:23:48.461341+00:00"}