{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:VQKOYMSGE66F5T3BYLXVGAFD2F","short_pith_number":"pith:VQKOYMSG","canonical_record":{"source":{"id":"2302.07902","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-15T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"9f1cfa8ea467799603b430d2b0ca03468ec41d68cffb959327ab1ecff4637f68","abstract_canon_sha256":"4ec181f4e00d25b5c61799217cf2c6a645db90339a29d8c63b422aefc020d14e"},"schema_version":"1.0"},"canonical_sha256":"ac14ec324627bc5ecf61c2ef5300a3d14b31d5c8800c475b204966f8a96770ed","source":{"kind":"arxiv","id":"2302.07902","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.07902","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"arxiv_version","alias_value":"2302.07902v1","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.07902","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_12","alias_value":"VQKOYMSGE66F","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_16","alias_value":"VQKOYMSGE66F5T3B","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_8","alias_value":"VQKOYMSG","created_at":"2026-07-05T05:55:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:VQKOYMSGE66F5T3BYLXVGAFD2F","target":"record","payload":{"canonical_record":{"source":{"id":"2302.07902","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-15T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"9f1cfa8ea467799603b430d2b0ca03468ec41d68cffb959327ab1ecff4637f68","abstract_canon_sha256":"4ec181f4e00d25b5c61799217cf2c6a645db90339a29d8c63b422aefc020d14e"},"schema_version":"1.0"},"canonical_sha256":"ac14ec324627bc5ecf61c2ef5300a3d14b31d5c8800c475b204966f8a96770ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:55:50.626129Z","signature_b64":"6/wjt0Nrd40xq9CC6PxGWpoad0oMAx1SSq/5d2s6XpPC+NZsk2BM/nvTGniPseNtwJjwCX9WDjJ2isv0CbmUCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac14ec324627bc5ecf61c2ef5300a3d14b31d5c8800c475b204966f8a96770ed","last_reissued_at":"2026-07-05T05:55:50.625693Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:55:50.625693Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.07902","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":"2026-07-05T05:55:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pyqaCCH7XvPgqXllUhm9H4Vd8185f5iK4dxzRYRQx7d81tfFkS21EuPJl3Im7AJdP+EsZVhfx7wFPrUeCPklBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T19:30:05.018876Z"},"content_sha256":"08f875355dfa70892396c91175bafa6ca70c190523af454a6178af2385dfc6a4","schema_version":"1.0","event_id":"sha256:08f875355dfa70892396c91175bafa6ca70c190523af454a6178af2385dfc6a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:VQKOYMSGE66F5T3BYLXVGAFD2F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accounting for non-ideal mixing effects in the hydrogen-helium equation of state","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Saburo Howard, Tristan Guillot","submitted_at":"2023-02-15T19:00:04Z","abstract_excerpt":"The equation of state for hydrogen and helium is fundamental for studying stars and giant planets. It has been shown that because of interactions at atomic and molecular levels, the behaviour of a mixture of hydrogen and helium cannot be accurately represented by considering these elements separately. This paper aims at providing a simple method to account for interactions between hydrogen and helium in interior and evolution models of giant planets. Using on the one hand ab initio simulations that involve a system of interacting hydrogen and helium particles and pure equations of state for hy"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.07902","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/2302.07902/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":"2026-07-05T05:55:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ibSBKuCVHyVBISJ4uP9NwMUL51nRXcmif/NNHO2FBpXCl1mFdt8OxXOOiXsHjfB/fVhQBLGeNNqTtnyGAJ9GDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T19:30:05.019413Z"},"content_sha256":"9e2bfcf7dd0f29cf0cff0623e1fa31847218fb35919c7fe32b7f70abc1c7d512","schema_version":"1.0","event_id":"sha256:9e2bfcf7dd0f29cf0cff0623e1fa31847218fb35919c7fe32b7f70abc1c7d512"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/bundle.json","state_url":"https://pith.science/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/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":"2026-08-19T19:30:05Z","links":{"resolver":"https://pith.science/pith/VQKOYMSGE66F5T3BYLXVGAFD2F","bundle":"https://pith.science/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/bundle.json","state":"https://pith.science/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQKOYMSGE66F5T3BYLXVGAFD2F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:VQKOYMSGE66F5T3BYLXVGAFD2F","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":"4ec181f4e00d25b5c61799217cf2c6a645db90339a29d8c63b422aefc020d14e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-15T19:00:04Z","title_canon_sha256":"9f1cfa8ea467799603b430d2b0ca03468ec41d68cffb959327ab1ecff4637f68"},"schema_version":"1.0","source":{"id":"2302.07902","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.07902","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"arxiv_version","alias_value":"2302.07902v1","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.07902","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_12","alias_value":"VQKOYMSGE66F","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_16","alias_value":"VQKOYMSGE66F5T3B","created_at":"2026-07-05T05:55:50Z"},{"alias_kind":"pith_short_8","alias_value":"VQKOYMSG","created_at":"2026-07-05T05:55:50Z"}],"graph_snapshots":[{"event_id":"sha256:9e2bfcf7dd0f29cf0cff0623e1fa31847218fb35919c7fe32b7f70abc1c7d512","target":"graph","created_at":"2026-07-05T05:55:50Z","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/2302.07902/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The equation of state for hydrogen and helium is fundamental for studying stars and giant planets. It has been shown that because of interactions at atomic and molecular levels, the behaviour of a mixture of hydrogen and helium cannot be accurately represented by considering these elements separately. This paper aims at providing a simple method to account for interactions between hydrogen and helium in interior and evolution models of giant planets. Using on the one hand ab initio simulations that involve a system of interacting hydrogen and helium particles and pure equations of state for hy","authors_text":"Saburo Howard, Tristan Guillot","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-15T19:00:04Z","title":"Accounting for non-ideal mixing effects in the hydrogen-helium equation of state"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.07902","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":"sha256:08f875355dfa70892396c91175bafa6ca70c190523af454a6178af2385dfc6a4","target":"record","created_at":"2026-07-05T05:55:50Z","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":"4ec181f4e00d25b5c61799217cf2c6a645db90339a29d8c63b422aefc020d14e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-15T19:00:04Z","title_canon_sha256":"9f1cfa8ea467799603b430d2b0ca03468ec41d68cffb959327ab1ecff4637f68"},"schema_version":"1.0","source":{"id":"2302.07902","kind":"arxiv","version":1}},"canonical_sha256":"ac14ec324627bc5ecf61c2ef5300a3d14b31d5c8800c475b204966f8a96770ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac14ec324627bc5ecf61c2ef5300a3d14b31d5c8800c475b204966f8a96770ed","first_computed_at":"2026-07-05T05:55:50.625693Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:55:50.625693Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6/wjt0Nrd40xq9CC6PxGWpoad0oMAx1SSq/5d2s6XpPC+NZsk2BM/nvTGniPseNtwJjwCX9WDjJ2isv0CbmUCg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:55:50.626129Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.07902","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08f875355dfa70892396c91175bafa6ca70c190523af454a6178af2385dfc6a4","sha256:9e2bfcf7dd0f29cf0cff0623e1fa31847218fb35919c7fe32b7f70abc1c7d512"],"state_sha256":"7e92ecd2638e94cc63beb7229901a84767d8dd04e065789abd7d82d3153f635f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XFoTrCNXeLVMt/ygbiLH89DZxfBdKiYLqyxs157UI1mX/K+S0ZSyZp41F55OEWqRxWFx6pn97gotV5RlYmcZCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T19:30:05.024941Z","bundle_sha256":"106be689bb0ccbbd503249e99c07b57863ccbda2430cf3b62fa2bb92b8c2fb63"}}