{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:DHCXSQND4RF3O2TKZT6KZO6X47","short_pith_number":"pith:DHCXSQND","canonical_record":{"source":{"id":"astro-ph/9906066","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-06-03T16:33:38Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"e6caef0574f9aab036a71c5d80d4bccad504936abbecd52763ec3465166093d3","abstract_canon_sha256":"a8d4bb5681ef07bb8804cd3a36dc4fc08df80a53e4ff1f1f00d1ff4eb5754907"},"schema_version":"1.0"},"canonical_sha256":"19c57941a3e44bb76a6accfcacbbd7e7fc7088c90861fe6d0e0546f432e3a1d2","source":{"kind":"arxiv","id":"astro-ph/9906066","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9906066","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9906066v2","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9906066","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_12","alias_value":"DHCXSQND4RF3","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_16","alias_value":"DHCXSQND4RF3O2TK","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_8","alias_value":"DHCXSQND","created_at":"2026-07-04T16:11:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:DHCXSQND4RF3O2TKZT6KZO6X47","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9906066","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-06-03T16:33:38Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"e6caef0574f9aab036a71c5d80d4bccad504936abbecd52763ec3465166093d3","abstract_canon_sha256":"a8d4bb5681ef07bb8804cd3a36dc4fc08df80a53e4ff1f1f00d1ff4eb5754907"},"schema_version":"1.0"},"canonical_sha256":"19c57941a3e44bb76a6accfcacbbd7e7fc7088c90861fe6d0e0546f432e3a1d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:11:17.071560Z","signature_b64":"hTsfAQ+GOQdqyESnc5H/B574y3PW2vgjEaN2x3pfj1rz48WqWj57xtTcMfjUj3lvXo9RbqCJjY/GfYaQuNgQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19c57941a3e44bb76a6accfcacbbd7e7fc7088c90861fe6d0e0546f432e3a1d2","last_reissued_at":"2026-07-04T16:11:17.071123Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:11:17.071123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9906066","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":"2026-07-04T16:11:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l0VtXvOpFZH000VESO1IBff8WgmHghaTapLnsMezVl7kR9Cb63AMdxfE0olmJGmCUgOJjKLFSIIN0292s7y0DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T11:25:22.527395Z"},"content_sha256":"0ab4db315d15d9369b556d1365de04980315bc4325a03a0faeb1314e4fec081c","schema_version":"1.0","event_id":"sha256:0ab4db315d15d9369b556d1365de04980315bc4325a03a0faeb1314e4fec081c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:DHCXSQND4RF3O2TKZT6KZO6X47","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extended Quintessence","license":"","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph","authors_text":"Carlo Baccigalupi, Francesca Perrotta, Sabino Matarrese","submitted_at":"1999-06-03T16:33:38Z","abstract_excerpt":"We study Quintessence cosmologies in the context of scalar-tensor theories of gravity, where a scalar field $\\phi$, assumed to provide most of the cosmic energy density today, is non-minimally coupled to the Ricci curvature scalar $R$. Such `Extended Quintessence' cosmologies have the appealing feature that the same field causing the time (and space) variation of the cosmological constant is the source of a varying Newton's constant \\`a la Jordan-Brans-Dicke. We investigate here two classes of models, where the gravitational sector of the Lagrangian is $F(\\phi)R$ with $F(\\phi )=\\xi\\phi^{2}$ (I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9906066","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/astro-ph/9906066/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":"2026-07-04T16:11:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hecb+pJZsiRhxABPjUJDsKoqRUW9k3Mx0zoTO8XVbDb/3xSf9sE8EgLs1Qi1/DYQMuZYgCbqxC4A2x4VkpejBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T11:25:22.527782Z"},"content_sha256":"8cf5b0eeba7ade7197fa6cb03af207d387947f9233327cea78afb508ee9d627c","schema_version":"1.0","event_id":"sha256:8cf5b0eeba7ade7197fa6cb03af207d387947f9233327cea78afb508ee9d627c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DHCXSQND4RF3O2TKZT6KZO6X47/bundle.json","state_url":"https://pith.science/pith/DHCXSQND4RF3O2TKZT6KZO6X47/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DHCXSQND4RF3O2TKZT6KZO6X47/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":"2026-07-27T11:25:22Z","links":{"resolver":"https://pith.science/pith/DHCXSQND4RF3O2TKZT6KZO6X47","bundle":"https://pith.science/pith/DHCXSQND4RF3O2TKZT6KZO6X47/bundle.json","state":"https://pith.science/pith/DHCXSQND4RF3O2TKZT6KZO6X47/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DHCXSQND4RF3O2TKZT6KZO6X47/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:DHCXSQND4RF3O2TKZT6KZO6X47","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":"a8d4bb5681ef07bb8804cd3a36dc4fc08df80a53e4ff1f1f00d1ff4eb5754907","cross_cats_sorted":["gr-qc","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-06-03T16:33:38Z","title_canon_sha256":"e6caef0574f9aab036a71c5d80d4bccad504936abbecd52763ec3465166093d3"},"schema_version":"1.0","source":{"id":"astro-ph/9906066","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9906066","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9906066v2","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9906066","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_12","alias_value":"DHCXSQND4RF3","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_16","alias_value":"DHCXSQND4RF3O2TK","created_at":"2026-07-04T16:11:17Z"},{"alias_kind":"pith_short_8","alias_value":"DHCXSQND","created_at":"2026-07-04T16:11:17Z"}],"graph_snapshots":[{"event_id":"sha256:8cf5b0eeba7ade7197fa6cb03af207d387947f9233327cea78afb508ee9d627c","target":"graph","created_at":"2026-07-04T16:11:17Z","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/astro-ph/9906066/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study Quintessence cosmologies in the context of scalar-tensor theories of gravity, where a scalar field $\\phi$, assumed to provide most of the cosmic energy density today, is non-minimally coupled to the Ricci curvature scalar $R$. Such `Extended Quintessence' cosmologies have the appealing feature that the same field causing the time (and space) variation of the cosmological constant is the source of a varying Newton's constant \\`a la Jordan-Brans-Dicke. We investigate here two classes of models, where the gravitational sector of the Lagrangian is $F(\\phi)R$ with $F(\\phi )=\\xi\\phi^{2}$ (I","authors_text":"Carlo Baccigalupi, Francesca Perrotta, Sabino Matarrese","cross_cats":["gr-qc","hep-th"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-06-03T16:33:38Z","title":"Extended Quintessence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9906066","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":"sha256:0ab4db315d15d9369b556d1365de04980315bc4325a03a0faeb1314e4fec081c","target":"record","created_at":"2026-07-04T16:11:17Z","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":"a8d4bb5681ef07bb8804cd3a36dc4fc08df80a53e4ff1f1f00d1ff4eb5754907","cross_cats_sorted":["gr-qc","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-06-03T16:33:38Z","title_canon_sha256":"e6caef0574f9aab036a71c5d80d4bccad504936abbecd52763ec3465166093d3"},"schema_version":"1.0","source":{"id":"astro-ph/9906066","kind":"arxiv","version":2}},"canonical_sha256":"19c57941a3e44bb76a6accfcacbbd7e7fc7088c90861fe6d0e0546f432e3a1d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19c57941a3e44bb76a6accfcacbbd7e7fc7088c90861fe6d0e0546f432e3a1d2","first_computed_at":"2026-07-04T16:11:17.071123Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:11:17.071123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hTsfAQ+GOQdqyESnc5H/B574y3PW2vgjEaN2x3pfj1rz48WqWj57xtTcMfjUj3lvXo9RbqCJjY/GfYaQuNgQBg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:11:17.071560Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9906066","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ab4db315d15d9369b556d1365de04980315bc4325a03a0faeb1314e4fec081c","sha256:8cf5b0eeba7ade7197fa6cb03af207d387947f9233327cea78afb508ee9d627c"],"state_sha256":"15b2cbc5e9d9dc49acdaa44e8aebe1da9090e9ed986a30443538b476f10b714a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CZvPGOkCCgy1YEJL4fyiZrt6VzO6mRKXzxwS0FosSRVXUQSo9ZzE2iS1YvQd7HH9EuvZlinS5j5450PkmbWOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-27T11:25:22.530336Z","bundle_sha256":"2ec288cf13b68046190ed715f61cd59877f616500ed5246483edfc78bc2d4776"}}