{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AQFXEP4I5JPPSDHBCXTXIQKDA6","short_pith_number":"pith:AQFXEP4I","canonical_record":{"source":{"id":"1802.08260","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-22T19:00:01Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"18af89cb37b9dda2138403fdf5153413f1b80566c30a0daad44ca62e67119a0e","abstract_canon_sha256":"6cd4908576466f9656dee5672bd5147c480e737ca8ea51c7dd904531ef20cd7a"},"schema_version":"1.0"},"canonical_sha256":"040b723f88ea5ef90ce115e774414307a6644877b0da6551ad89a538c6a7616c","source":{"kind":"arxiv","id":"1802.08260","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08260","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08260v2","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08260","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"pith_short_12","alias_value":"AQFXEP4I5JPP","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AQFXEP4I5JPPSDHB","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AQFXEP4I","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AQFXEP4I5JPPSDHBCXTXIQKDA6","target":"record","payload":{"canonical_record":{"source":{"id":"1802.08260","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-22T19:00:01Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"18af89cb37b9dda2138403fdf5153413f1b80566c30a0daad44ca62e67119a0e","abstract_canon_sha256":"6cd4908576466f9656dee5672bd5147c480e737ca8ea51c7dd904531ef20cd7a"},"schema_version":"1.0"},"canonical_sha256":"040b723f88ea5ef90ce115e774414307a6644877b0da6551ad89a538c6a7616c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:40.626706Z","signature_b64":"TYKs+icSNWG0cd2edlyDkr3pyyd1jS4pTfQ+I1gsnm8/Y9ZpUAV46i30XG/tMxHrj8XNjhwiGu6CmHFRumzTDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"040b723f88ea5ef90ce115e774414307a6644877b0da6551ad89a538c6a7616c","last_reissued_at":"2026-05-18T00:06:40.626221Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:40.626221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.08260","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":"2026-05-18T00:06:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B262S8pXHdMGZQcwwa3m5d6htgdcJTQnaANbmvSTye2Og+M57Fwm5OzWUxaMhigtnpGSnzGqDAUoXpjMN+e4Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:16:02.037115Z"},"content_sha256":"6b268c2761ff0f679ea7073972a478941edb3c14dabd82d36d56a0d63234db37","schema_version":"1.0","event_id":"sha256:6b268c2761ff0f679ea7073972a478941edb3c14dabd82d36d56a0d63234db37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AQFXEP4I5JPPSDHBCXTXIQKDA6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Signature of Planetary Mergers on Stellar Spins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Ahmed Qureshi, Evgenya Shkolnik, Smadar Naoz","submitted_at":"2018-02-22T19:00:01Z","abstract_excerpt":"One of the predictions of high eccentricity planetary migration is that many planets will end up plunging into their host stars. We investigate the consequence of planetary mergers on their stellar hosts' spin-period. Energy and angular momentum conservation yield that a planet consumption by a star will spin-up the star. We find that our calculations align with the observed bifurcation in the stellar spin-period in young clusters. For example, after a Sun-like star has eaten a Jupiter-mass planet it will spin up by ~60% (i.e., spin-period is reduced by ~60%), causing an apparent gap in the st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08260","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":""},"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":"2026-05-18T00:06:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mNiYshkdEIfzd9FYOC0k6bIC/fxuMizf0W77LPjJBZgK398BkJWC1dDh9w+7MBx64VrhvPyX0hT8phv7GHMKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:16:02.037818Z"},"content_sha256":"5111dbc9d83a9eee4b056a52c7c0e85e26232edb80daa8c37120972ef9f60014","schema_version":"1.0","event_id":"sha256:5111dbc9d83a9eee4b056a52c7c0e85e26232edb80daa8c37120972ef9f60014"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/bundle.json","state_url":"https://pith.science/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/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":"2026-05-25T18:16:02Z","links":{"resolver":"https://pith.science/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6","bundle":"https://pith.science/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/bundle.json","state":"https://pith.science/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AQFXEP4I5JPPSDHBCXTXIQKDA6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AQFXEP4I5JPPSDHBCXTXIQKDA6","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":"6cd4908576466f9656dee5672bd5147c480e737ca8ea51c7dd904531ef20cd7a","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-22T19:00:01Z","title_canon_sha256":"18af89cb37b9dda2138403fdf5153413f1b80566c30a0daad44ca62e67119a0e"},"schema_version":"1.0","source":{"id":"1802.08260","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08260","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08260v2","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08260","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"pith_short_12","alias_value":"AQFXEP4I5JPP","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AQFXEP4I5JPPSDHB","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AQFXEP4I","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:5111dbc9d83a9eee4b056a52c7c0e85e26232edb80daa8c37120972ef9f60014","target":"graph","created_at":"2026-05-18T00:06:40Z","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":"One of the predictions of high eccentricity planetary migration is that many planets will end up plunging into their host stars. We investigate the consequence of planetary mergers on their stellar hosts' spin-period. Energy and angular momentum conservation yield that a planet consumption by a star will spin-up the star. We find that our calculations align with the observed bifurcation in the stellar spin-period in young clusters. For example, after a Sun-like star has eaten a Jupiter-mass planet it will spin up by ~60% (i.e., spin-period is reduced by ~60%), causing an apparent gap in the st","authors_text":"Ahmed Qureshi, Evgenya Shkolnik, Smadar Naoz","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-22T19:00:01Z","title":"Signature of Planetary Mergers on Stellar Spins"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08260","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":"sha256:6b268c2761ff0f679ea7073972a478941edb3c14dabd82d36d56a0d63234db37","target":"record","created_at":"2026-05-18T00:06:40Z","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":"6cd4908576466f9656dee5672bd5147c480e737ca8ea51c7dd904531ef20cd7a","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-02-22T19:00:01Z","title_canon_sha256":"18af89cb37b9dda2138403fdf5153413f1b80566c30a0daad44ca62e67119a0e"},"schema_version":"1.0","source":{"id":"1802.08260","kind":"arxiv","version":2}},"canonical_sha256":"040b723f88ea5ef90ce115e774414307a6644877b0da6551ad89a538c6a7616c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"040b723f88ea5ef90ce115e774414307a6644877b0da6551ad89a538c6a7616c","first_computed_at":"2026-05-18T00:06:40.626221Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:40.626221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TYKs+icSNWG0cd2edlyDkr3pyyd1jS4pTfQ+I1gsnm8/Y9ZpUAV46i30XG/tMxHrj8XNjhwiGu6CmHFRumzTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:40.626706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.08260","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b268c2761ff0f679ea7073972a478941edb3c14dabd82d36d56a0d63234db37","sha256:5111dbc9d83a9eee4b056a52c7c0e85e26232edb80daa8c37120972ef9f60014"],"state_sha256":"d31458c146b3502710cfe6d68eba369f9dc2147db2ce165de25b7a3a0475b881"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oEZIQVzqjAP7vCgMHRbOVBA0Tlz7EpXGMwRRnxUI1Qr6U7t3FwiJNodk8rhbSzde0Ag+qJ6LgdRJhCmaPIejDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:16:02.041284Z","bundle_sha256":"240d826f3fbe413c7268cff52ac7fe750db739fa275d6f79f58b10d6db05f0eb"}}