{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:KS53OWDJROCRICTNBSK5L2NMVD","short_pith_number":"pith:KS53OWDJ","canonical_record":{"source":{"id":"1206.2281","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T16:41:26Z","cross_cats_sorted":[],"title_canon_sha256":"68d29a09d2039732c4a582abc1fc7a606fc2a49e4bf54993c2e9103576b98daf","abstract_canon_sha256":"56338fe32ab88cb68e4128f9e9ad0fadd47c17c0b9c9dcdd692331f971a98fc4"},"schema_version":"1.0"},"canonical_sha256":"54bbb758698b85140a6d0c95d5e9aca8c0547dc0bbc18383acd0348db2a69ff1","source":{"kind":"arxiv","id":"1206.2281","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2281","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2281v2","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2281","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"pith_short_12","alias_value":"KS53OWDJROCR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KS53OWDJROCRICTN","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KS53OWDJ","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:KS53OWDJROCRICTNBSK5L2NMVD","target":"record","payload":{"canonical_record":{"source":{"id":"1206.2281","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T16:41:26Z","cross_cats_sorted":[],"title_canon_sha256":"68d29a09d2039732c4a582abc1fc7a606fc2a49e4bf54993c2e9103576b98daf","abstract_canon_sha256":"56338fe32ab88cb68e4128f9e9ad0fadd47c17c0b9c9dcdd692331f971a98fc4"},"schema_version":"1.0"},"canonical_sha256":"54bbb758698b85140a6d0c95d5e9aca8c0547dc0bbc18383acd0348db2a69ff1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:47.713766Z","signature_b64":"ekets1UNaIKhWD8fvt5XV2tMSxi1soqNigBrxQBffcJqyCCMtNfltbxbPGsAVZglowlBIojOv8+oeh7RsWFoAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"54bbb758698b85140a6d0c95d5e9aca8c0547dc0bbc18383acd0348db2a69ff1","last_reissued_at":"2026-05-18T03:48:47.713025Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:47.713025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.2281","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":"2026-05-18T03:48:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h6OPCnK/HSrqOAn2yO6YFntFKlU2HHOIjzEwTvzSODmJu5LqQU6ibq9ROPXlW4kH+oDuTWW6DrWYoiQra0VMAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T10:06:23.250786Z"},"content_sha256":"8bf532d757f8bd0bbba4e2cab7798b4e2a69a46e7de955050b1419c79ed98ba8","schema_version":"1.0","event_id":"sha256:8bf532d757f8bd0bbba4e2cab7798b4e2a69a46e7de955050b1419c79ed98ba8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:KS53OWDJROCRICTNBSK5L2NMVD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dark energy from dark radiation in strongly coupled cosmologies with no fine tuning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Giandomenico Sassi, Giuseppe La Vacca, Silvio A. Bonometto","submitted_at":"2012-06-11T16:41:26Z","abstract_excerpt":"A dual component made of non-relativistic particles and a scalar field, exchanging energy, naturally falls onto an attractor solution, making them a (sub)dominant part of the cosmic energy during the radiation dominated era, provided that the constant \\beta, measuring the coupling, is strong enough. The density parameters of both components are then constant, as they expand as a^{-4}. If the field energy is then prevalently kinetic, as is expected, its energy is exactly half of the pressureless component; the dual component as a whole, then, has a density parameter \\Omega_{cd} = 3/4\\beta^2 (e."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2281","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":"2026-05-18T03:48:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"58XiHMc8DOM7rpDeks47mR8VHRIZwyfHicfB3KMuBNMHm5891jO6ZL/LKbc5yQ7WoEWHJHX6qtT+ufxZvHkLCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T10:06:23.251531Z"},"content_sha256":"825d2b4b9103a372b51c3a07fa66780784e0f3c3acbde80eba4b2b7bab91167f","schema_version":"1.0","event_id":"sha256:825d2b4b9103a372b51c3a07fa66780784e0f3c3acbde80eba4b2b7bab91167f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KS53OWDJROCRICTNBSK5L2NMVD/bundle.json","state_url":"https://pith.science/pith/KS53OWDJROCRICTNBSK5L2NMVD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KS53OWDJROCRICTNBSK5L2NMVD/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":"2026-05-25T10:06:23Z","links":{"resolver":"https://pith.science/pith/KS53OWDJROCRICTNBSK5L2NMVD","bundle":"https://pith.science/pith/KS53OWDJROCRICTNBSK5L2NMVD/bundle.json","state":"https://pith.science/pith/KS53OWDJROCRICTNBSK5L2NMVD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KS53OWDJROCRICTNBSK5L2NMVD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KS53OWDJROCRICTNBSK5L2NMVD","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":"56338fe32ab88cb68e4128f9e9ad0fadd47c17c0b9c9dcdd692331f971a98fc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T16:41:26Z","title_canon_sha256":"68d29a09d2039732c4a582abc1fc7a606fc2a49e4bf54993c2e9103576b98daf"},"schema_version":"1.0","source":{"id":"1206.2281","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2281","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2281v2","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2281","created_at":"2026-05-18T03:48:47Z"},{"alias_kind":"pith_short_12","alias_value":"KS53OWDJROCR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KS53OWDJROCRICTN","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KS53OWDJ","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:825d2b4b9103a372b51c3a07fa66780784e0f3c3acbde80eba4b2b7bab91167f","target":"graph","created_at":"2026-05-18T03:48:47Z","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 dual component made of non-relativistic particles and a scalar field, exchanging energy, naturally falls onto an attractor solution, making them a (sub)dominant part of the cosmic energy during the radiation dominated era, provided that the constant \\beta, measuring the coupling, is strong enough. The density parameters of both components are then constant, as they expand as a^{-4}. If the field energy is then prevalently kinetic, as is expected, its energy is exactly half of the pressureless component; the dual component as a whole, then, has a density parameter \\Omega_{cd} = 3/4\\beta^2 (e.","authors_text":"Giandomenico Sassi, Giuseppe La Vacca, Silvio A. Bonometto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T16:41:26Z","title":"Dark energy from dark radiation in strongly coupled cosmologies with no fine tuning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2281","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":"sha256:8bf532d757f8bd0bbba4e2cab7798b4e2a69a46e7de955050b1419c79ed98ba8","target":"record","created_at":"2026-05-18T03:48:47Z","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":"56338fe32ab88cb68e4128f9e9ad0fadd47c17c0b9c9dcdd692331f971a98fc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-11T16:41:26Z","title_canon_sha256":"68d29a09d2039732c4a582abc1fc7a606fc2a49e4bf54993c2e9103576b98daf"},"schema_version":"1.0","source":{"id":"1206.2281","kind":"arxiv","version":2}},"canonical_sha256":"54bbb758698b85140a6d0c95d5e9aca8c0547dc0bbc18383acd0348db2a69ff1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54bbb758698b85140a6d0c95d5e9aca8c0547dc0bbc18383acd0348db2a69ff1","first_computed_at":"2026-05-18T03:48:47.713025Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:47.713025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ekets1UNaIKhWD8fvt5XV2tMSxi1soqNigBrxQBffcJqyCCMtNfltbxbPGsAVZglowlBIojOv8+oeh7RsWFoAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:47.713766Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.2281","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8bf532d757f8bd0bbba4e2cab7798b4e2a69a46e7de955050b1419c79ed98ba8","sha256:825d2b4b9103a372b51c3a07fa66780784e0f3c3acbde80eba4b2b7bab91167f"],"state_sha256":"f79420eff02636c0feefe4941d70628f5614925c1f74e67c75e07a07d78ff769"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nJZkr4XZVAnIHOuoZ8bnVE1GDtI6EIn6b/6mxkfNpVb+OAYYnqYc+lxhEb1qYTnuHa8BwN2n0qKf1YUDMq0eDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T10:06:23.255169Z","bundle_sha256":"76be22cc9608812daf1269c7ebe30a47b089960f77eaa16bec05e008ae29383c"}}