{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:KJ7MC7BKSECCT7VGZD2W2KXB5U","short_pith_number":"pith:KJ7MC7BK","schema_version":"1.0","canonical_sha256":"527ec17c2a910429fea6c8f56d2ae1ed1d02d3589c9875f84e8fe3784fb0345d","source":{"kind":"arxiv","id":"1901.05021","version":1},"attestation_state":"computed","paper":{"title":"Revealing the dust grain size in the inner envelope of the Class I protostar Per-emb-50","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Miotello, C. Agurto-Gangas, I.W. Stephens, J.E. Pineda, L. Szucs, L. Testi, M. Dunham, M. Tazzari, P. Caselli, T.L. Bourke","submitted_at":"2019-01-15T19:01:33Z","abstract_excerpt":"A good constraint of when the growth of dust grains from sub-micrometer to millimeter sizes occurs, is crucial for planet formation models. This provides the first step towards the production of pebbles and planetesimals in protoplanetary disks. Currently, it is well established that Class II objects have large dust grains. However, it is not clear when in the star formation process this grain growth occurs. We use multi-wavelength millimeter observations of a Class I protostar to obtain the spectral index of the observed flux densities $\\alpha_\\mathrm{mm}$ of the unresolved disk and the surro"},"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":"1901.05021","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-15T19:01:33Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"61d72c98f1cb5a71b346a34977e6b4d5f511c2d331ac444aad9c24823706c189","abstract_canon_sha256":"72329ec3316ff44eef73cd2a5879762a28cab378926d354e1e0d349b2135f901"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:08.524367Z","signature_b64":"cptOI76Jac/VtcW24lZvpdNiOKgA+gXPKfhQ5akKAqq54Mjo/sR4MJRy21b47MfnM9s5chCO+dNRHeL6JcuuDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"527ec17c2a910429fea6c8f56d2ae1ed1d02d3589c9875f84e8fe3784fb0345d","last_reissued_at":"2026-05-17T23:50:08.523772Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:08.523772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Revealing the dust grain size in the inner envelope of the Class I protostar Per-emb-50","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Miotello, C. Agurto-Gangas, I.W. Stephens, J.E. Pineda, L. Szucs, L. Testi, M. Dunham, M. Tazzari, P. Caselli, T.L. Bourke","submitted_at":"2019-01-15T19:01:33Z","abstract_excerpt":"A good constraint of when the growth of dust grains from sub-micrometer to millimeter sizes occurs, is crucial for planet formation models. This provides the first step towards the production of pebbles and planetesimals in protoplanetary disks. Currently, it is well established that Class II objects have large dust grains. However, it is not clear when in the star formation process this grain growth occurs. We use multi-wavelength millimeter observations of a Class I protostar to obtain the spectral index of the observed flux densities $\\alpha_\\mathrm{mm}$ of the unresolved disk and the surro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05021","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":"1901.05021","created_at":"2026-05-17T23:50:08.523861+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.05021v1","created_at":"2026-05-17T23:50:08.523861+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05021","created_at":"2026-05-17T23:50:08.523861+00:00"},{"alias_kind":"pith_short_12","alias_value":"KJ7MC7BKSECC","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_16","alias_value":"KJ7MC7BKSECCT7VG","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_8","alias_value":"KJ7MC7BK","created_at":"2026-05-18T12:33:21.387695+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/KJ7MC7BKSECCT7VGZD2W2KXB5U","json":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U.json","graph_json":"https://pith.science/api/pith-number/KJ7MC7BKSECCT7VGZD2W2KXB5U/graph.json","events_json":"https://pith.science/api/pith-number/KJ7MC7BKSECCT7VGZD2W2KXB5U/events.json","paper":"https://pith.science/paper/KJ7MC7BK"},"agent_actions":{"view_html":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U","download_json":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U.json","view_paper":"https://pith.science/paper/KJ7MC7BK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.05021&json=true","fetch_graph":"https://pith.science/api/pith-number/KJ7MC7BKSECCT7VGZD2W2KXB5U/graph.json","fetch_events":"https://pith.science/api/pith-number/KJ7MC7BKSECCT7VGZD2W2KXB5U/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U/action/storage_attestation","attest_author":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U/action/author_attestation","sign_citation":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U/action/citation_signature","submit_replication":"https://pith.science/pith/KJ7MC7BKSECCT7VGZD2W2KXB5U/action/replication_record"}},"created_at":"2026-05-17T23:50:08.523861+00:00","updated_at":"2026-05-17T23:50:08.523861+00:00"}