{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4MYPLBMEDMDVVQ65NANVULS5T5","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":"55aac22939a2b1189009699d218f195187db11ed95ead631a7b1ed5530ea3deb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-07T18:59:42Z","title_canon_sha256":"347390f606f022a33fe617bdb8b07e73419d8d4aff29cc626852d44a92678052"},"schema_version":"1.0","source":{"id":"1507.01921","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01921","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01921v1","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01921","created_at":"2026-05-18T01:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"4MYPLBMEDMDV","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4MYPLBMEDMDVVQ65","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4MYPLBME","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:925ca13ab872585109d8e3f6f2fd9a9fcfb5b5d84f5837902229ae09a7444b01","target":"graph","created_at":"2026-05-18T01:24:54Z","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":"A non-minimal coupling between the dark matter and dark energy components may offer a way of solving the so-called coincidence problem. In this paper we propose a low-$z$ test for such hypothesis using measurements of the gas mass fraction $f_{\\rm{gas}}$ in relaxed and massive galaxy clusters. The test applies to any model whose dilution of dark matter is modified with respect to the standard $a^{-3}$ scaling, as usual in interacting models, where $a$ is the cosmological scale factor. We apply the test to current $f_{\\rm{gas}}$ data and perform Monte Carlo simulations to forecast the necessary","authors_text":"G. C. Carvalho, J. S. Alcaniz, R. S. Goncalves","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-07T18:59:42Z","title":"A low-$z$ test for interacting dark energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01921","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":"sha256:343114c22357c34eb8f2d679d7437d7bd27d73ddeaff8b816d3d677c5320fdf5","target":"record","created_at":"2026-05-18T01:24:54Z","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":"55aac22939a2b1189009699d218f195187db11ed95ead631a7b1ed5530ea3deb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-07-07T18:59:42Z","title_canon_sha256":"347390f606f022a33fe617bdb8b07e73419d8d4aff29cc626852d44a92678052"},"schema_version":"1.0","source":{"id":"1507.01921","kind":"arxiv","version":1}},"canonical_sha256":"e330f585841b075ac3dd681b5a2e5d9f43e6d6c78d9f9c6fa2af011fde17325c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e330f585841b075ac3dd681b5a2e5d9f43e6d6c78d9f9c6fa2af011fde17325c","first_computed_at":"2026-05-18T01:24:54.133769Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:54.133769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2b68DM7BCqDWS4qmGNLjvnwrNsNUzZRS8Q5R7PiuP8g3ewS4vGddfjqLzmmDaEAT2qdCUjZQN0AuFp084tPrCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:54.134336Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01921","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:343114c22357c34eb8f2d679d7437d7bd27d73ddeaff8b816d3d677c5320fdf5","sha256:925ca13ab872585109d8e3f6f2fd9a9fcfb5b5d84f5837902229ae09a7444b01"],"state_sha256":"e99704b0de5795e1d7aec0e85e52120ef6ef51d10617e28a75cd3c8feeef9134"}