{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:23BEDLQKEF4LOGTBGLBESJXFRI","short_pith_number":"pith:23BEDLQK","canonical_record":{"source":{"id":"1702.04383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-14T21:00:01Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"5ea7c3b80ef0a7597a2497567051396d1d58cea1ea2dd14c4b45824e7e36ad85","abstract_canon_sha256":"26a078777f76c2c6a0923ac9e38cdd252c384bed93d3fdfd99bdc4a9b5aeceef"},"schema_version":"1.0"},"canonical_sha256":"d6c241ae0a2178b71a6132c24926e58a0c6d1539c5362d33e0c771001dff0e8d","source":{"kind":"arxiv","id":"1702.04383","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04383","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04383v1","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04383","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"pith_short_12","alias_value":"23BEDLQKEF4L","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"23BEDLQKEF4LOGTB","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"23BEDLQK","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:23BEDLQKEF4LOGTBGLBESJXFRI","target":"record","payload":{"canonical_record":{"source":{"id":"1702.04383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-14T21:00:01Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"5ea7c3b80ef0a7597a2497567051396d1d58cea1ea2dd14c4b45824e7e36ad85","abstract_canon_sha256":"26a078777f76c2c6a0923ac9e38cdd252c384bed93d3fdfd99bdc4a9b5aeceef"},"schema_version":"1.0"},"canonical_sha256":"d6c241ae0a2178b71a6132c24926e58a0c6d1539c5362d33e0c771001dff0e8d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:01.880222Z","signature_b64":"ARpZpeM4iFpPPJTlS3bbRbUacW7ovQbBM7nczKP+sSq75lNrMjKYRyPfiO6keZxvcWafMx6T02RuZiCAumvbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6c241ae0a2178b71a6132c24926e58a0c6d1539c5362d33e0c771001dff0e8d","last_reissued_at":"2026-05-18T00:42:01.879501Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:01.879501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.04383","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":"2026-05-18T00:42:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z208x7NGHln0nF1QlQKD7FrTs/ndmAj1g7gzriLpBXm8uqBIgbIVwlADEOKYl5wsGX8vcJepOV8KRikfT+lHBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:16:35.150751Z"},"content_sha256":"c8c77851eb7bdbf182aec6cf09fdba5025f2b7900f21fe4f643f7b91f0dcb7f7","schema_version":"1.0","event_id":"sha256:c8c77851eb7bdbf182aec6cf09fdba5025f2b7900f21fe4f643f7b91f0dcb7f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:23BEDLQKEF4LOGTBGLBESJXFRI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterising face-on accretion onto and the subsequent contraction of protoplanetary discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"F.I. Pelupessy, O.R. Pols, S. Portegies Zwart, T.P.G. Wijnen","submitted_at":"2017-02-14T21:00:01Z","abstract_excerpt":"Observations indicate that stars generally lose their protoplanetary discs on a timescale of about 5 Myr. Which mechanisms are responsible for the disc dissipation is still debated. Here we investigate the movement through an ambient medium as a possible cause of disc dispersal. The ram pressure exerted by the flow can truncate the disc and the accretion of material with no azimuthal angular momentum leads to further disc contraction. We derive a theoretical model from accretion disc theory that describes the evolution of the disc radius, mass, and surface density profile as a function of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04383","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:42:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/m16c8wTuM6TzQjpUnG5dstXKnwaMFY4+TGKbxMsx/Vyf2MURoUdsIbGIh666sXCtc+aoeZ/ZZ1UAE0jXTtEDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:16:35.151098Z"},"content_sha256":"f0477005dbdd495e981de5a4a3e8d50b08b97752b156f06457d79ec87f19d683","schema_version":"1.0","event_id":"sha256:f0477005dbdd495e981de5a4a3e8d50b08b97752b156f06457d79ec87f19d683"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/23BEDLQKEF4LOGTBGLBESJXFRI/bundle.json","state_url":"https://pith.science/pith/23BEDLQKEF4LOGTBGLBESJXFRI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/23BEDLQKEF4LOGTBGLBESJXFRI/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":"2026-06-02T04:16:35Z","links":{"resolver":"https://pith.science/pith/23BEDLQKEF4LOGTBGLBESJXFRI","bundle":"https://pith.science/pith/23BEDLQKEF4LOGTBGLBESJXFRI/bundle.json","state":"https://pith.science/pith/23BEDLQKEF4LOGTBGLBESJXFRI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/23BEDLQKEF4LOGTBGLBESJXFRI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:23BEDLQKEF4LOGTBGLBESJXFRI","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":"26a078777f76c2c6a0923ac9e38cdd252c384bed93d3fdfd99bdc4a9b5aeceef","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-14T21:00:01Z","title_canon_sha256":"5ea7c3b80ef0a7597a2497567051396d1d58cea1ea2dd14c4b45824e7e36ad85"},"schema_version":"1.0","source":{"id":"1702.04383","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04383","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04383v1","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04383","created_at":"2026-05-18T00:42:01Z"},{"alias_kind":"pith_short_12","alias_value":"23BEDLQKEF4L","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"23BEDLQKEF4LOGTB","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"23BEDLQK","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:f0477005dbdd495e981de5a4a3e8d50b08b97752b156f06457d79ec87f19d683","target":"graph","created_at":"2026-05-18T00:42:01Z","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"},"paper":{"abstract_excerpt":"Observations indicate that stars generally lose their protoplanetary discs on a timescale of about 5 Myr. Which mechanisms are responsible for the disc dissipation is still debated. Here we investigate the movement through an ambient medium as a possible cause of disc dispersal. The ram pressure exerted by the flow can truncate the disc and the accretion of material with no azimuthal angular momentum leads to further disc contraction. We derive a theoretical model from accretion disc theory that describes the evolution of the disc radius, mass, and surface density profile as a function of the ","authors_text":"F.I. Pelupessy, O.R. Pols, S. Portegies Zwart, T.P.G. Wijnen","cross_cats":["astro-ph.EP","astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-14T21:00:01Z","title":"Characterising face-on accretion onto and the subsequent contraction of protoplanetary discs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04383","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:c8c77851eb7bdbf182aec6cf09fdba5025f2b7900f21fe4f643f7b91f0dcb7f7","target":"record","created_at":"2026-05-18T00:42:01Z","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":"26a078777f76c2c6a0923ac9e38cdd252c384bed93d3fdfd99bdc4a9b5aeceef","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-14T21:00:01Z","title_canon_sha256":"5ea7c3b80ef0a7597a2497567051396d1d58cea1ea2dd14c4b45824e7e36ad85"},"schema_version":"1.0","source":{"id":"1702.04383","kind":"arxiv","version":1}},"canonical_sha256":"d6c241ae0a2178b71a6132c24926e58a0c6d1539c5362d33e0c771001dff0e8d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6c241ae0a2178b71a6132c24926e58a0c6d1539c5362d33e0c771001dff0e8d","first_computed_at":"2026-05-18T00:42:01.879501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:01.879501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ARpZpeM4iFpPPJTlS3bbRbUacW7ovQbBM7nczKP+sSq75lNrMjKYRyPfiO6keZxvcWafMx6T02RuZiCAumvbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:01.880222Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.04383","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8c77851eb7bdbf182aec6cf09fdba5025f2b7900f21fe4f643f7b91f0dcb7f7","sha256:f0477005dbdd495e981de5a4a3e8d50b08b97752b156f06457d79ec87f19d683"],"state_sha256":"8e3c90eade7d057e7488c250d3a832fa5eee9d6aeef166240b57ce142cd4d84e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MxfrMqyEa1YuBXVdYA8O8HXS+DH124xGWczx3Ff0Kq3ait1N3hnf5ikRW348/7vOs8S9Vk7Nl9dLel8KeXHkCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T04:16:35.153211Z","bundle_sha256":"2a662bea3baa5d45dc03c6ff4761db45222967f0a42f5c2287e96e0d288ec457"}}