{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:MZ2OL7EM6PPCEZIACQHB6C76NP","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":"3360ad59c93d97d86af601e488f8d790d36e8cfa703ee15ca202c144aedc1db8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-26T19:57:52Z","title_canon_sha256":"bd7275da44a863f64ff33c75d4c03885962111251c80c5e6405797e42d72927c"},"schema_version":"1.0","source":{"id":"1805.10530","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.10530","created_at":"2026-05-18T00:14:52Z"},{"alias_kind":"arxiv_version","alias_value":"1805.10530v1","created_at":"2026-05-18T00:14:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.10530","created_at":"2026-05-18T00:14:52Z"},{"alias_kind":"pith_short_12","alias_value":"MZ2OL7EM6PPC","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MZ2OL7EM6PPCEZIA","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MZ2OL7EM","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:4d5791b0eb9ab6337d4386364652c362d737d063c119e6472acec8b4479fc031","target":"graph","created_at":"2026-05-18T00:14:52Z","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":"More than a third of all exoplanets can be classified as super-Earths based on radius (1-2 $R_{\\bigoplus}$) and mass (< 10 $M_{\\bigoplus}$). Here we model mass-radius relations based on silicate mantle and iron core equations of state to infer to first order the structure and composition range of rocky super-Earths assuming insignificant gas envelopes. We develop a new equation of state of hexagonal close packed (hcp) iron for super-Earth conditions (SEOS) based on density functional theory results for pressures up to 137~TPa. A comparison of SEOS and extrapolated equations of state for iron f","authors_text":"Attilio Rivolidini, Gerd Steinle-Neumann, Jan Jaeken, Kaustubh Hakim, Stefaan Cottenier, Thomas Chust, Tim Van Hoolst","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-26T19:57:52Z","title":"A new ab initio equation of state of hcp-Fe and its implication on the interior structure and mass-radius relations of rocky super-Earths"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.10530","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":"sha256:2665fb170cfcd7fbcc55684a0479a65397e7f513f2a8af09c1830ec98ca696bc","target":"record","created_at":"2026-05-18T00:14:52Z","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":"3360ad59c93d97d86af601e488f8d790d36e8cfa703ee15ca202c144aedc1db8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-05-26T19:57:52Z","title_canon_sha256":"bd7275da44a863f64ff33c75d4c03885962111251c80c5e6405797e42d72927c"},"schema_version":"1.0","source":{"id":"1805.10530","kind":"arxiv","version":1}},"canonical_sha256":"6674e5fc8cf3de226500140e1f0bfe6bc5382713a360a9e54c5f6b5a0852486e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6674e5fc8cf3de226500140e1f0bfe6bc5382713a360a9e54c5f6b5a0852486e","first_computed_at":"2026-05-18T00:14:52.249599Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:52.249599Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z7Zo1VO6/O5YRrqAUHtWMyfddz7Epn416GcvocRd0vYojbqA9m3FPAUBZ9KtqUxSJEc11R9InYnHNiBmpAP2DA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:52.250109Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.10530","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2665fb170cfcd7fbcc55684a0479a65397e7f513f2a8af09c1830ec98ca696bc","sha256:4d5791b0eb9ab6337d4386364652c362d737d063c119e6472acec8b4479fc031"],"state_sha256":"fecb00fd9bafd110a492d620ba4937b7664c9059ff8d39062cd80fdecb15cc5e"}