{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:FK23MXSBOFFGK6AJOPQZSIJNCZ","short_pith_number":"pith:FK23MXSB","canonical_record":{"source":{"id":"0710.0207","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-01T05:57:23Z","cross_cats_sorted":[],"title_canon_sha256":"eeca751b322a25d2a4ddf8361cd40a7b0045508eb7cfe8cb2b958d115bf4bbf7","abstract_canon_sha256":"2c6b417b8b40ad44da853df9595c31119377bedf354e10628b6b61dbfad221d7"},"schema_version":"1.0"},"canonical_sha256":"2ab5b65e41714a65780973e199212d164a1323b3e50c015bc30d85f2979e7329","source":{"kind":"arxiv","id":"0710.0207","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.0207","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"arxiv_version","alias_value":"0710.0207v2","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.0207","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_12","alias_value":"FK23MXSBOFFG","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_16","alias_value":"FK23MXSBOFFGK6AJ","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_8","alias_value":"FK23MXSB","created_at":"2026-07-04T15:44:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:FK23MXSBOFFGK6AJOPQZSIJNCZ","target":"record","payload":{"canonical_record":{"source":{"id":"0710.0207","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-01T05:57:23Z","cross_cats_sorted":[],"title_canon_sha256":"eeca751b322a25d2a4ddf8361cd40a7b0045508eb7cfe8cb2b958d115bf4bbf7","abstract_canon_sha256":"2c6b417b8b40ad44da853df9595c31119377bedf354e10628b6b61dbfad221d7"},"schema_version":"1.0"},"canonical_sha256":"2ab5b65e41714a65780973e199212d164a1323b3e50c015bc30d85f2979e7329","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:44:33.052359Z","signature_b64":"GyQILlJhKIaesTcF+3/fBHJGQzoLSQxvEnGcaocvDr4k17uElFFPdA+LAJLMnspwKQI3f6870KYklL+77BSjCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ab5b65e41714a65780973e199212d164a1323b3e50c015bc30d85f2979e7329","last_reissued_at":"2026-07-04T15:44:33.051985Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:44:33.051985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0710.0207","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:44:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IfCutgEGp7gVcyTQ+T6sa+MGXVaTeqMhJbx+dK8IHnWVT0YhmldwHwqyfBiclCOI4crhNit8u7mjAa5QuN9jBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T08:05:09.230705Z"},"content_sha256":"850853c71c8bf4216f4d1de887270a39a33d25ebaf740bd75092c4427586379c","schema_version":"1.0","event_id":"sha256:850853c71c8bf4216f4d1de887270a39a33d25ebaf740bd75092c4427586379c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:FK23MXSBOFFGK6AJOPQZSIJNCZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Medium-separation binaries do not affect the first steps of planet formation","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Apai, E. E. Hardegree-Ullman, I. Pascucci, J. Bouwman, J. S. Kim, M. R. Meyer","submitted_at":"2007-10-01T05:57:23Z","abstract_excerpt":"The first steps of planet formation are marked by the growth and crystallization of sub-micrometer-sized dust grains accompanied by dust settling toward the disk midplane. In this paper we explore whether the first steps of planet formation are affected by the presence of medium-separation stellar companions. We selected two large samples of disks around single and binary T Tauri stars in Taurus that are thought to have only a modest age spread of a few Myr. The companions of our binary sample are at projected separations between 10 and 450 AU with masses down to about 0.1 solar masses. We use"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.0207","kind":"arxiv","version":2},"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/0710.0207/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":"2026-07-04T15:44:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Izi2RN344ota+neqGDlt92I81fQVi4iOVfuAkBagm2eBLTqqZWTqqF9cBuWnno8A2q/oAkDNZh8rmf4dNbTTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T08:05:09.231069Z"},"content_sha256":"a9734a322ad94502b91e12aceebaacab0506ca457fa90bd06c5785d465a85219","schema_version":"1.0","event_id":"sha256:a9734a322ad94502b91e12aceebaacab0506ca457fa90bd06c5785d465a85219"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/bundle.json","state_url":"https://pith.science/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/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":"2026-07-05T08:05:09Z","links":{"resolver":"https://pith.science/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ","bundle":"https://pith.science/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/bundle.json","state":"https://pith.science/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FK23MXSBOFFGK6AJOPQZSIJNCZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:FK23MXSBOFFGK6AJOPQZSIJNCZ","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":"2c6b417b8b40ad44da853df9595c31119377bedf354e10628b6b61dbfad221d7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-01T05:57:23Z","title_canon_sha256":"eeca751b322a25d2a4ddf8361cd40a7b0045508eb7cfe8cb2b958d115bf4bbf7"},"schema_version":"1.0","source":{"id":"0710.0207","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.0207","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"arxiv_version","alias_value":"0710.0207v2","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.0207","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_12","alias_value":"FK23MXSBOFFG","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_16","alias_value":"FK23MXSBOFFGK6AJ","created_at":"2026-07-04T15:44:33Z"},{"alias_kind":"pith_short_8","alias_value":"FK23MXSB","created_at":"2026-07-04T15:44:33Z"}],"graph_snapshots":[{"event_id":"sha256:a9734a322ad94502b91e12aceebaacab0506ca457fa90bd06c5785d465a85219","target":"graph","created_at":"2026-07-04T15:44:33Z","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/0710.0207/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The first steps of planet formation are marked by the growth and crystallization of sub-micrometer-sized dust grains accompanied by dust settling toward the disk midplane. In this paper we explore whether the first steps of planet formation are affected by the presence of medium-separation stellar companions. We selected two large samples of disks around single and binary T Tauri stars in Taurus that are thought to have only a modest age spread of a few Myr. The companions of our binary sample are at projected separations between 10 and 450 AU with masses down to about 0.1 solar masses. We use","authors_text":"D. Apai, E. E. Hardegree-Ullman, I. Pascucci, J. Bouwman, J. S. Kim, M. R. Meyer","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-10-01T05:57:23Z","title":"Medium-separation binaries do not affect the first steps of planet formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.0207","kind":"arxiv","version":2},"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":"sha256:850853c71c8bf4216f4d1de887270a39a33d25ebaf740bd75092c4427586379c","target":"record","created_at":"2026-07-04T15:44:33Z","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":"2c6b417b8b40ad44da853df9595c31119377bedf354e10628b6b61dbfad221d7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-01T05:57:23Z","title_canon_sha256":"eeca751b322a25d2a4ddf8361cd40a7b0045508eb7cfe8cb2b958d115bf4bbf7"},"schema_version":"1.0","source":{"id":"0710.0207","kind":"arxiv","version":2}},"canonical_sha256":"2ab5b65e41714a65780973e199212d164a1323b3e50c015bc30d85f2979e7329","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ab5b65e41714a65780973e199212d164a1323b3e50c015bc30d85f2979e7329","first_computed_at":"2026-07-04T15:44:33.051985Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:44:33.051985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GyQILlJhKIaesTcF+3/fBHJGQzoLSQxvEnGcaocvDr4k17uElFFPdA+LAJLMnspwKQI3f6870KYklL+77BSjCg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:44:33.052359Z","signed_message":"canonical_sha256_bytes"},"source_id":"0710.0207","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:850853c71c8bf4216f4d1de887270a39a33d25ebaf740bd75092c4427586379c","sha256:a9734a322ad94502b91e12aceebaacab0506ca457fa90bd06c5785d465a85219"],"state_sha256":"2e8fd17f295fdfaeb916a0dd1cb8a350237740293597e0fe51184248f571f1d9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9AtBQ2IB2K/fSXtFbVsRqTOSAaUhoN3s16J9t0VZZR0PdHuTk5AxWcnNSDBDx1p70rSrcl4wZe9EUTmI34TMAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T08:05:09.233047Z","bundle_sha256":"9f7155e3f4f8e14606f4d4c8183194af53d1e3ebec5d4fe84fddf35dba691856"}}