{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:3IAJYN5IOPMNJYLCFM2JHNAOJI","short_pith_number":"pith:3IAJYN5I","canonical_record":{"source":{"id":"1709.02826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-08T18:21:16Z","cross_cats_sorted":[],"title_canon_sha256":"7385f00f44e4543cfd74e97ed8ae8d13b3cde481d71769d98721ec4e30f7aca3","abstract_canon_sha256":"06d5eeaf9f55c79006dd0bcaf7c90d5579946ffdd1576664939d7add9d290052"},"schema_version":"1.0"},"canonical_sha256":"da009c37a873d8d4e1622b3493b40e4a185c5b3bca4bdd4018223d594e31de7e","source":{"kind":"arxiv","id":"1709.02826","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.02826","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"arxiv_version","alias_value":"1709.02826v1","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.02826","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"pith_short_12","alias_value":"3IAJYN5IOPMN","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"3IAJYN5IOPMNJYLC","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"3IAJYN5I","created_at":"2026-05-18T12:30:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:3IAJYN5IOPMNJYLCFM2JHNAOJI","target":"record","payload":{"canonical_record":{"source":{"id":"1709.02826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-08T18:21:16Z","cross_cats_sorted":[],"title_canon_sha256":"7385f00f44e4543cfd74e97ed8ae8d13b3cde481d71769d98721ec4e30f7aca3","abstract_canon_sha256":"06d5eeaf9f55c79006dd0bcaf7c90d5579946ffdd1576664939d7add9d290052"},"schema_version":"1.0"},"canonical_sha256":"da009c37a873d8d4e1622b3493b40e4a185c5b3bca4bdd4018223d594e31de7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:39.909812Z","signature_b64":"aJ0nu0FyddRJ3JqegQB/oRPPSnnzccC6tDsz9uGpS5/pgWcipNdo+/MUiw8jBaRywiTuEZwXxeFioNfNzutRBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da009c37a873d8d4e1622b3493b40e4a185c5b3bca4bdd4018223d594e31de7e","last_reissued_at":"2026-05-18T00:31:39.909426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:39.909426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.02826","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":"2026-05-18T00:31:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q22ixDxpU5iRHMH+PfrjOZG92X0trzOy5QbezOuFrw0btdSxoTn7KkqXvHVj1p9wi7RmnmKIZ2cVZQJaZ/zkBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:44.752312Z"},"content_sha256":"9db6860478d7207d4f7b88878da21f557cdcb87e7a5da6b67063783f3db18d63","schema_version":"1.0","event_id":"sha256:9db6860478d7207d4f7b88878da21f557cdcb87e7a5da6b67063783f3db18d63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:3IAJYN5IOPMNJYLCFM2JHNAOJI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Morphology and enhanced star formation in a Cartwheel-like ring galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Bosma, B. Epinat, C. Struck, E. Athanassoula, F. Bournaud, F. Renaud, J. Fensch, K. Kraljic, P.-A. Duc, P. Amram, V. Perret","submitted_at":"2017-09-08T18:21:16Z","abstract_excerpt":"We use hydrodynamical simulations of a Cartwheel-like ring galaxy, modelled as a nearly head-on collision of a small companion with a larger disc galaxy, to probe the evolution of the gaseous structures and flows, and to explore the physical conditions setting the star formation activity. Star formation is first quenched by tides as the companion approaches, before being enhanced shortly after the collision. The ring ploughs the disc material as it radially extends, and almost simultaneously depletes its stellar and gaseous reservoir into the central region, through the spokes, and finally dis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.02826","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":"2026-05-18T00:31:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AB0oG4wjopaFlRLZQnC9WGJGl9AMI9b+mAnYezN4wlpMXw2cS2YEcjPsFlVFBM3QrZVyXi5fYIi2sqB+QXaxDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:44.753025Z"},"content_sha256":"d8f994450eb13ea9744f9c208d86b8e0e8f7486af6c2c365de1a27aa763c7f7d","schema_version":"1.0","event_id":"sha256:d8f994450eb13ea9744f9c208d86b8e0e8f7486af6c2c365de1a27aa763c7f7d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/bundle.json","state_url":"https://pith.science/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/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":"2026-05-26T16:54:44Z","links":{"resolver":"https://pith.science/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI","bundle":"https://pith.science/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/bundle.json","state":"https://pith.science/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3IAJYN5IOPMNJYLCFM2JHNAOJI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:3IAJYN5IOPMNJYLCFM2JHNAOJI","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":"06d5eeaf9f55c79006dd0bcaf7c90d5579946ffdd1576664939d7add9d290052","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-08T18:21:16Z","title_canon_sha256":"7385f00f44e4543cfd74e97ed8ae8d13b3cde481d71769d98721ec4e30f7aca3"},"schema_version":"1.0","source":{"id":"1709.02826","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.02826","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"arxiv_version","alias_value":"1709.02826v1","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.02826","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"pith_short_12","alias_value":"3IAJYN5IOPMN","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"3IAJYN5IOPMNJYLC","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"3IAJYN5I","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:d8f994450eb13ea9744f9c208d86b8e0e8f7486af6c2c365de1a27aa763c7f7d","target":"graph","created_at":"2026-05-18T00:31:39Z","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":"We use hydrodynamical simulations of a Cartwheel-like ring galaxy, modelled as a nearly head-on collision of a small companion with a larger disc galaxy, to probe the evolution of the gaseous structures and flows, and to explore the physical conditions setting the star formation activity. Star formation is first quenched by tides as the companion approaches, before being enhanced shortly after the collision. The ring ploughs the disc material as it radially extends, and almost simultaneously depletes its stellar and gaseous reservoir into the central region, through the spokes, and finally dis","authors_text":"A. Bosma, B. Epinat, C. Struck, E. Athanassoula, F. Bournaud, F. Renaud, J. Fensch, K. Kraljic, P.-A. Duc, P. Amram, V. Perret","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-08T18:21:16Z","title":"Morphology and enhanced star formation in a Cartwheel-like ring galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.02826","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":"sha256:9db6860478d7207d4f7b88878da21f557cdcb87e7a5da6b67063783f3db18d63","target":"record","created_at":"2026-05-18T00:31:39Z","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":"06d5eeaf9f55c79006dd0bcaf7c90d5579946ffdd1576664939d7add9d290052","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-08T18:21:16Z","title_canon_sha256":"7385f00f44e4543cfd74e97ed8ae8d13b3cde481d71769d98721ec4e30f7aca3"},"schema_version":"1.0","source":{"id":"1709.02826","kind":"arxiv","version":1}},"canonical_sha256":"da009c37a873d8d4e1622b3493b40e4a185c5b3bca4bdd4018223d594e31de7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"da009c37a873d8d4e1622b3493b40e4a185c5b3bca4bdd4018223d594e31de7e","first_computed_at":"2026-05-18T00:31:39.909426Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:39.909426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aJ0nu0FyddRJ3JqegQB/oRPPSnnzccC6tDsz9uGpS5/pgWcipNdo+/MUiw8jBaRywiTuEZwXxeFioNfNzutRBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:39.909812Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.02826","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9db6860478d7207d4f7b88878da21f557cdcb87e7a5da6b67063783f3db18d63","sha256:d8f994450eb13ea9744f9c208d86b8e0e8f7486af6c2c365de1a27aa763c7f7d"],"state_sha256":"54ae6edf4e47264333ab0e30e62dd2863ebb7483d62f3d3b862890ecfec21589"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D9fwglv8ssIsstAsDrvAXblqoTFgnWDg8XE/+AsrWcQEgUp4gp4F30FreSCYOFeLtnmYUtk3+tntGakohIpYBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:54:44.756754Z","bundle_sha256":"de259ce86abd54ae4e53d12ee7d9c7d4eb7f6d80d3a37061b00e2f38aff80514"}}