{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:JXEVDTQNGTVOIXUM7CQZOGAGQD","short_pith_number":"pith:JXEVDTQN","canonical_record":{"source":{"id":"1202.0374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-02T07:21:29Z","cross_cats_sorted":[],"title_canon_sha256":"b2f0c81a422e0007f629aa90dc0422cc51ad6e5292fad7667cb1a27e581a0774","abstract_canon_sha256":"110ccfb9193b5b51381dc7adcaf345dd9aab49c215fb366097097df79e69bd25"},"schema_version":"1.0"},"canonical_sha256":"4dc951ce0d34eae45e8cf8a197180680f6440d977277d49de9cca9a2e0f06cb5","source":{"kind":"arxiv","id":"1202.0374","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0374","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0374v1","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0374","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"JXEVDTQNGTVO","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JXEVDTQNGTVOIXUM","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JXEVDTQN","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:JXEVDTQNGTVOIXUM7CQZOGAGQD","target":"record","payload":{"canonical_record":{"source":{"id":"1202.0374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-02T07:21:29Z","cross_cats_sorted":[],"title_canon_sha256":"b2f0c81a422e0007f629aa90dc0422cc51ad6e5292fad7667cb1a27e581a0774","abstract_canon_sha256":"110ccfb9193b5b51381dc7adcaf345dd9aab49c215fb366097097df79e69bd25"},"schema_version":"1.0"},"canonical_sha256":"4dc951ce0d34eae45e8cf8a197180680f6440d977277d49de9cca9a2e0f06cb5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:36.412409Z","signature_b64":"79nAktQ1fQPfA1OiE41v4wnfOrlZkmAR+unMIkOpemK5QUVJPhIFmW8iACL0T3BV2MMEyJaUElxDnFwlvfLhCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4dc951ce0d34eae45e8cf8a197180680f6440d977277d49de9cca9a2e0f06cb5","last_reissued_at":"2026-05-18T01:58:36.411797Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:36.411797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.0374","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":"2026-05-18T01:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3CE8K+bzMetEnIud8sN8w/ffXCvyEfPW6FY/UYdsD/KkypST06KlsopldfVQ7ib8cAe7SDs4rgCkz8Zg56ASDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:47:51.582946Z"},"content_sha256":"dc83fda95df01d511fa31c9d8f42ded50e2facea12355b56d9e30f09e0acdc8a","schema_version":"1.0","event_id":"sha256:dc83fda95df01d511fa31c9d8f42ded50e2facea12355b56d9e30f09e0acdc8a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:JXEVDTQNGTVOIXUM7CQZOGAGQD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Surface chemistry in the interstellar medium - I - H2 formation by Langmuir-Hinshelwood and Eley-Rideal mechanisms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cecilia Pinto, Evelyne Roueff, Fabrice Roy, Franck Le Petit, Jacques Le Bourlot","submitted_at":"2012-02-02T07:21:29Z","abstract_excerpt":"H2 formation remains a major issue for the understanding of interstellar physics. We investigate H2 formation in the interstellar medium at the light of the most recent experimental and theoretical data. We implemented detailed H2 formation mechanisms on grains surface in the Meudon PDR code : i) Langmuir-Hinshelwood mechanism taking into account the contribution of the different sizes of dust grains in the diffusion processes and ii) the Eley-Rideal mechanism. We show that, thanks to these processes, H2 can be formed even in regions where dust temperature is larger than 25 K. We also show tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0374","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":""},"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":"2026-05-18T01:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mwt7KSSyWfvaLczGSOkNTHtHru39W3s+MRR1B44rqz/pvT5i/8Dh8vY6FXS+Fn7YFDG/fA1jBgZnvnjJG+oOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:47:51.583601Z"},"content_sha256":"6180d0d264b6887fd122496cfaa88722dddcf877ec16ba5d7a3b9fbba18d801c","schema_version":"1.0","event_id":"sha256:6180d0d264b6887fd122496cfaa88722dddcf877ec16ba5d7a3b9fbba18d801c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/bundle.json","state_url":"https://pith.science/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/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":"2026-05-31T04:47:51Z","links":{"resolver":"https://pith.science/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD","bundle":"https://pith.science/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/bundle.json","state":"https://pith.science/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JXEVDTQNGTVOIXUM7CQZOGAGQD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:JXEVDTQNGTVOIXUM7CQZOGAGQD","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":"110ccfb9193b5b51381dc7adcaf345dd9aab49c215fb366097097df79e69bd25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-02T07:21:29Z","title_canon_sha256":"b2f0c81a422e0007f629aa90dc0422cc51ad6e5292fad7667cb1a27e581a0774"},"schema_version":"1.0","source":{"id":"1202.0374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0374","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0374v1","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0374","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"JXEVDTQNGTVO","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JXEVDTQNGTVOIXUM","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JXEVDTQN","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:6180d0d264b6887fd122496cfaa88722dddcf877ec16ba5d7a3b9fbba18d801c","target":"graph","created_at":"2026-05-18T01:58:36Z","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":"H2 formation remains a major issue for the understanding of interstellar physics. We investigate H2 formation in the interstellar medium at the light of the most recent experimental and theoretical data. We implemented detailed H2 formation mechanisms on grains surface in the Meudon PDR code : i) Langmuir-Hinshelwood mechanism taking into account the contribution of the different sizes of dust grains in the diffusion processes and ii) the Eley-Rideal mechanism. We show that, thanks to these processes, H2 can be formed even in regions where dust temperature is larger than 25 K. We also show tha","authors_text":"Cecilia Pinto, Evelyne Roueff, Fabrice Roy, Franck Le Petit, Jacques Le Bourlot","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-02T07:21:29Z","title":"Surface chemistry in the interstellar medium - I - H2 formation by Langmuir-Hinshelwood and Eley-Rideal mechanisms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0374","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:dc83fda95df01d511fa31c9d8f42ded50e2facea12355b56d9e30f09e0acdc8a","target":"record","created_at":"2026-05-18T01:58:36Z","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":"110ccfb9193b5b51381dc7adcaf345dd9aab49c215fb366097097df79e69bd25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-02T07:21:29Z","title_canon_sha256":"b2f0c81a422e0007f629aa90dc0422cc51ad6e5292fad7667cb1a27e581a0774"},"schema_version":"1.0","source":{"id":"1202.0374","kind":"arxiv","version":1}},"canonical_sha256":"4dc951ce0d34eae45e8cf8a197180680f6440d977277d49de9cca9a2e0f06cb5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4dc951ce0d34eae45e8cf8a197180680f6440d977277d49de9cca9a2e0f06cb5","first_computed_at":"2026-05-18T01:58:36.411797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:36.411797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"79nAktQ1fQPfA1OiE41v4wnfOrlZkmAR+unMIkOpemK5QUVJPhIFmW8iACL0T3BV2MMEyJaUElxDnFwlvfLhCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:36.412409Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.0374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc83fda95df01d511fa31c9d8f42ded50e2facea12355b56d9e30f09e0acdc8a","sha256:6180d0d264b6887fd122496cfaa88722dddcf877ec16ba5d7a3b9fbba18d801c"],"state_sha256":"e5ab82fe9f76cfad11bd19bd381054fda1e16a158dd1057fcac547e57deb0a8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"paqDbX0GPkeEon5Um/YLoC9ySjRisoXQn1wxReKyYT66/aazaNNJhGQ6NOKoJaPyaztood5YHImzZ7qjTkPJCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:47:51.586892Z","bundle_sha256":"0c14a78b9c87ae4e2b939ea0a5a0548507cb9254bfd27bd5c8d4b796d12bbc85"}}