{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FAFWBDLNZWF7NK5ZAJUWGCGCGZ","short_pith_number":"pith:FAFWBDLN","canonical_record":{"source":{"id":"2012.08127","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-15T07:22:17Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"6346102289bb09db5321c55adff6f38906a811a9c1a2eefc7156c2c0ba304c3d","abstract_canon_sha256":"9a3a4d88dfe07f3ff839b832e3528dd27747cc01fbaa3e3270f7e29e2d08346b"},"schema_version":"1.0"},"canonical_sha256":"280b608d6dcd8bf6abb902696308c2364ca120d4bce8440ed5260d1ebbe7b1dd","source":{"kind":"arxiv","id":"2012.08127","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.08127","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"arxiv_version","alias_value":"2012.08127v1","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.08127","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_12","alias_value":"FAFWBDLNZWF7","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_16","alias_value":"FAFWBDLNZWF7NK5Z","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_8","alias_value":"FAFWBDLN","created_at":"2026-07-05T02:12:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FAFWBDLNZWF7NK5ZAJUWGCGCGZ","target":"record","payload":{"canonical_record":{"source":{"id":"2012.08127","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-15T07:22:17Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"6346102289bb09db5321c55adff6f38906a811a9c1a2eefc7156c2c0ba304c3d","abstract_canon_sha256":"9a3a4d88dfe07f3ff839b832e3528dd27747cc01fbaa3e3270f7e29e2d08346b"},"schema_version":"1.0"},"canonical_sha256":"280b608d6dcd8bf6abb902696308c2364ca120d4bce8440ed5260d1ebbe7b1dd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:12:26.456524Z","signature_b64":"ZpCz2aI9ACIfN9wDqqmiFySSQ8RQ3qWK5IX+LFviQsKq3VXi5zBxxEPqobZltpztnHFXazRr1H/1fkf+l/2BDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"280b608d6dcd8bf6abb902696308c2364ca120d4bce8440ed5260d1ebbe7b1dd","last_reissued_at":"2026-07-05T02:12:26.456147Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:12:26.456147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.08127","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:12:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VFtCiKlQ5HixTZEFUXcJE3d0ZFSaEXSickMJ1G40ts9qKualbqCiMJMVBTuP7kQOc53+HdlmmbDJNj6z2pH9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:33:38.463900Z"},"content_sha256":"283fdeec1d123601a12c345475178499624c671057b273ba4b3a5448121cf350","schema_version":"1.0","event_id":"sha256:283fdeec1d123601a12c345475178499624c671057b273ba4b3a5448121cf350"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FAFWBDLNZWF7NK5ZAJUWGCGCGZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pebbles in an Embedded Protostellar Disk: The Case of CB26","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Chuan-Peng Zhang, John J. Tobin, Ralf Launhardt, Thomas Henning, Yao Liu","submitted_at":"2020-12-15T07:22:17Z","abstract_excerpt":"Planetary cores are thought to form in proto-planetary disks via the growth of dusty solid material. However, it is unclear how early this process begins. We study the physical structure and grain growth in the edge-on disk that surrounds the ~1 Myr old low-mass (~0.55 Msun) protostar embedded in the Bok Globule CB26 to examine how much grain growth has already occurred in the protostellar phase. We combine the SED between 0.9 ${\\mu}$m and 6.4 cm with high angular resolution continuum maps at 1.3, 2.9, and 8.1 mm, and use the radiative transfer code RADMC-3D to conduct a detailed modelling of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.08127","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/2012.08127/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:12:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tb7q9FG0lP7iHnE65qGigWh/NZhumDFb7x0flUHnsfW0hzBmESjxoRU7YOFNjtG51BVGCLuLOaRE05W7UFcICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:33:38.464422Z"},"content_sha256":"a4a92a76aefe7af6b7e932d1099361c7c1b8bdee0b4c1a50cdb67b9c157bec14","schema_version":"1.0","event_id":"sha256:a4a92a76aefe7af6b7e932d1099361c7c1b8bdee0b4c1a50cdb67b9c157bec14"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/bundle.json","state_url":"https://pith.science/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-06T19:33:38Z","links":{"resolver":"https://pith.science/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ","bundle":"https://pith.science/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/bundle.json","state":"https://pith.science/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FAFWBDLNZWF7NK5ZAJUWGCGCGZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FAFWBDLNZWF7NK5ZAJUWGCGCGZ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9a3a4d88dfe07f3ff839b832e3528dd27747cc01fbaa3e3270f7e29e2d08346b","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-15T07:22:17Z","title_canon_sha256":"6346102289bb09db5321c55adff6f38906a811a9c1a2eefc7156c2c0ba304c3d"},"schema_version":"1.0","source":{"id":"2012.08127","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.08127","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"arxiv_version","alias_value":"2012.08127v1","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.08127","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_12","alias_value":"FAFWBDLNZWF7","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_16","alias_value":"FAFWBDLNZWF7NK5Z","created_at":"2026-07-05T02:12:26Z"},{"alias_kind":"pith_short_8","alias_value":"FAFWBDLN","created_at":"2026-07-05T02:12:26Z"}],"graph_snapshots":[{"event_id":"sha256:a4a92a76aefe7af6b7e932d1099361c7c1b8bdee0b4c1a50cdb67b9c157bec14","target":"graph","created_at":"2026-07-05T02:12:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2012.08127/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Planetary cores are thought to form in proto-planetary disks via the growth of dusty solid material. However, it is unclear how early this process begins. We study the physical structure and grain growth in the edge-on disk that surrounds the ~1 Myr old low-mass (~0.55 Msun) protostar embedded in the Bok Globule CB26 to examine how much grain growth has already occurred in the protostellar phase. We combine the SED between 0.9 ${\\mu}$m and 6.4 cm with high angular resolution continuum maps at 1.3, 2.9, and 8.1 mm, and use the radiative transfer code RADMC-3D to conduct a detailed modelling of ","authors_text":"Chuan-Peng Zhang, John J. Tobin, Ralf Launhardt, Thomas Henning, Yao Liu","cross_cats":["astro-ph.EP"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-15T07:22:17Z","title":"Pebbles in an Embedded Protostellar Disk: The Case of CB26"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.08127","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:283fdeec1d123601a12c345475178499624c671057b273ba4b3a5448121cf350","target":"record","created_at":"2026-07-05T02:12:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"9a3a4d88dfe07f3ff839b832e3528dd27747cc01fbaa3e3270f7e29e2d08346b","cross_cats_sorted":["astro-ph.EP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-15T07:22:17Z","title_canon_sha256":"6346102289bb09db5321c55adff6f38906a811a9c1a2eefc7156c2c0ba304c3d"},"schema_version":"1.0","source":{"id":"2012.08127","kind":"arxiv","version":1}},"canonical_sha256":"280b608d6dcd8bf6abb902696308c2364ca120d4bce8440ed5260d1ebbe7b1dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"280b608d6dcd8bf6abb902696308c2364ca120d4bce8440ed5260d1ebbe7b1dd","first_computed_at":"2026-07-05T02:12:26.456147Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:12:26.456147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZpCz2aI9ACIfN9wDqqmiFySSQ8RQ3qWK5IX+LFviQsKq3VXi5zBxxEPqobZltpztnHFXazRr1H/1fkf+l/2BDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:12:26.456524Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.08127","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:283fdeec1d123601a12c345475178499624c671057b273ba4b3a5448121cf350","sha256:a4a92a76aefe7af6b7e932d1099361c7c1b8bdee0b4c1a50cdb67b9c157bec14"],"state_sha256":"7869a3d51ab5758303b32bd0accce823aa11f29e6df146896e11559ae2014f41"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6khVLhS6w6z1toQ7M9mF76T9/YT23S6gnO9Mcz/eztjFkipS1+sfOiqq9GGD/Cizw+yEi2yrwAwHOE5WMnfqCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T19:33:38.469924Z","bundle_sha256":"00dcc57da4e3f018337f010708294085f3d7de88b39521a44c4a5d9a561d2ea7"}}