{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:Z7PCVMGPV73ZBGSERXPHFPTJK4","short_pith_number":"pith:Z7PCVMGP","schema_version":"1.0","canonical_sha256":"cfde2ab0cfaff7909a448dde72be69571a8d7b1e437b6db6ce60187e81893b80","source":{"kind":"arxiv","id":"1208.2717","version":1},"attestation_state":"computed","paper":{"title":"Photoevaporation and spatial variation of grain sizes in Orion 114-426","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Anna Miotello, Luca Ricci, Marco A. C. Potenza, Massimo Robberto","submitted_at":"2012-08-13T21:50:31Z","abstract_excerpt":"Deep HST broad-band images taken with ACS and WFPC2 of the giant ($\\sim 1000$ AU diameter) dark silhouette proplyd 114-426 in the Orion Nebula show that this system is tilted, asymmetric, warped and photoevaporated. The exquisite angular resolution of ACS allows us to map the distribution of dust grains at the northern translucent edge of the disk, dominated by the photoevaporative flow. Using the Mie theory for standard circumstellar disk grains, we find evidence for a spatial gradient in grain size. The typical dust radius, $\\simeq 0.2-0.7 \\mu$m (less than what reported by previous studies) "},"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":"1208.2717","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-13T21:50:31Z","cross_cats_sorted":[],"title_canon_sha256":"20bab25338caa59385220f4bedd9880268941b6cd4077b5d260452619b59f985","abstract_canon_sha256":"b798ebb4ab8e50d7c32c1bed5163a969d24a185c9f379f2bde214605f6622596"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:48.905389Z","signature_b64":"C8nI2j8/tpoWpI4IaaRKfrX76TFy8hWpZfrdX5+LkCpx681To3N3ss+aX1HjHB9b5HVQXnlTH3KU/MzYukxvCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cfde2ab0cfaff7909a448dde72be69571a8d7b1e437b6db6ce60187e81893b80","last_reissued_at":"2026-05-18T01:19:48.904746Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:48.904746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Photoevaporation and spatial variation of grain sizes in Orion 114-426","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Anna Miotello, Luca Ricci, Marco A. C. Potenza, Massimo Robberto","submitted_at":"2012-08-13T21:50:31Z","abstract_excerpt":"Deep HST broad-band images taken with ACS and WFPC2 of the giant ($\\sim 1000$ AU diameter) dark silhouette proplyd 114-426 in the Orion Nebula show that this system is tilted, asymmetric, warped and photoevaporated. The exquisite angular resolution of ACS allows us to map the distribution of dust grains at the northern translucent edge of the disk, dominated by the photoevaporative flow. Using the Mie theory for standard circumstellar disk grains, we find evidence for a spatial gradient in grain size. The typical dust radius, $\\simeq 0.2-0.7 \\mu$m (less than what reported by previous studies) "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.2717","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":"1208.2717","created_at":"2026-05-18T01:19:48.904828+00:00"},{"alias_kind":"arxiv_version","alias_value":"1208.2717v1","created_at":"2026-05-18T01:19:48.904828+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.2717","created_at":"2026-05-18T01:19:48.904828+00:00"},{"alias_kind":"pith_short_12","alias_value":"Z7PCVMGPV73Z","created_at":"2026-05-18T12:27:30.460161+00:00"},{"alias_kind":"pith_short_16","alias_value":"Z7PCVMGPV73ZBGSE","created_at":"2026-05-18T12:27:30.460161+00:00"},{"alias_kind":"pith_short_8","alias_value":"Z7PCVMGP","created_at":"2026-05-18T12:27:30.460161+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/Z7PCVMGPV73ZBGSERXPHFPTJK4","json":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4.json","graph_json":"https://pith.science/api/pith-number/Z7PCVMGPV73ZBGSERXPHFPTJK4/graph.json","events_json":"https://pith.science/api/pith-number/Z7PCVMGPV73ZBGSERXPHFPTJK4/events.json","paper":"https://pith.science/paper/Z7PCVMGP"},"agent_actions":{"view_html":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4","download_json":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4.json","view_paper":"https://pith.science/paper/Z7PCVMGP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1208.2717&json=true","fetch_graph":"https://pith.science/api/pith-number/Z7PCVMGPV73ZBGSERXPHFPTJK4/graph.json","fetch_events":"https://pith.science/api/pith-number/Z7PCVMGPV73ZBGSERXPHFPTJK4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4/action/storage_attestation","attest_author":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4/action/author_attestation","sign_citation":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4/action/citation_signature","submit_replication":"https://pith.science/pith/Z7PCVMGPV73ZBGSERXPHFPTJK4/action/replication_record"}},"created_at":"2026-05-18T01:19:48.904828+00:00","updated_at":"2026-05-18T01:19:48.904828+00:00"}