{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZXMCHPUR7OR64G6TJDDRIKFZJF","short_pith_number":"pith:ZXMCHPUR","canonical_record":{"source":{"id":"1811.10607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-26T19:00:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"465b3dac5f0f92006ed762396fc11a9ff4038a772abcc3e0bc2ebc9cfcce9620","abstract_canon_sha256":"ca6ed1591fac3c217f4a431c524944ed47955ec7221a082f32cae36f849a599f"},"schema_version":"1.0"},"canonical_sha256":"cdd823be91fba3ee1bd348c71428b9495c7786fdba46f0134891e6cecaa6bf8c","source":{"kind":"arxiv","id":"1811.10607","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10607","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10607v1","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10607","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"pith_short_12","alias_value":"ZXMCHPUR7OR6","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZXMCHPUR7OR64G6T","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZXMCHPUR","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZXMCHPUR7OR64G6TJDDRIKFZJF","target":"record","payload":{"canonical_record":{"source":{"id":"1811.10607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-26T19:00:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"465b3dac5f0f92006ed762396fc11a9ff4038a772abcc3e0bc2ebc9cfcce9620","abstract_canon_sha256":"ca6ed1591fac3c217f4a431c524944ed47955ec7221a082f32cae36f849a599f"},"schema_version":"1.0"},"canonical_sha256":"cdd823be91fba3ee1bd348c71428b9495c7786fdba46f0134891e6cecaa6bf8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:04.204568Z","signature_b64":"R3MW9jeOfvv6gnhMwNFq4gqoPxwoYMgiQo5qC1GZI9gzfXAOZ0Gqq2pSJ5p6lK/VBya6fd5m8f2nn0wEa0JkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdd823be91fba3ee1bd348c71428b9495c7786fdba46f0134891e6cecaa6bf8c","last_reissued_at":"2026-05-17T23:43:04.204078Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:04.204078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.10607","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":"2026-05-17T23:43:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lFtkAbitEHixuTIohjNl9mBm6RWULrESLC9/bQMBrvaoNEt+DzKhJncZP1YElSTcejmMunhMlSV7fgkA9HAeAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:16:06.411968Z"},"content_sha256":"859a7e32442292e31bf10b2f78da4cfefc92853f00a20cc6154a833220f4b789","schema_version":"1.0","event_id":"sha256:859a7e32442292e31bf10b2f78da4cfefc92853f00a20cc6154a833220f4b789"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZXMCHPUR7OR64G6TJDDRIKFZJF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of ultra-diffuse galaxies in the field and in galaxy groups","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"2), (2) SCIPP, (3) San Jose State University, 4), (4) UCO, (5) NYU Abu Dhabi, 6), (6) MPIA, (7) Instituto de Astrofisica de Canarias, 8) ((1) HUJI, (8) Universidad de La Laguna), Aaron Dutton (5), Aaron J. Romanowsky (3, Andrea Maccio (5, Arianna Di Cintio (7, Avishai Dekel (1, Fangzhou Jiang (1), Jonathan Freundlich (1), UC Santa Cruz","submitted_at":"2018-11-26T19:00:00Z","abstract_excerpt":"We study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from dwarfs in a characteristic mass range by multiple episodes of supernova feedback (Di Cintio et al. 2017), group UDGs may also form by tidal puffing up and they become quiescent by ram-pressure stripping. The field and group UDGs share similar properties, independent of distance from the group centre. Their dark-matter haloes have ordinary spin parameters and centrally dominant dark-matter cores. Their stellar componen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10607","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":"2026-05-17T23:43:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RH5aLpXl0bBiY3bti/jVu8mlO8CueMQO3b9l2Z74Dcm0o6LYD07iNGqQzNlDqO0tC1Y5ePnTJRZ8bXCSBec0CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:16:06.412608Z"},"content_sha256":"71ec1eb32aad1eda903c065c081a00be728a01b70bd0e717d75f18d28a63bf47","schema_version":"1.0","event_id":"sha256:71ec1eb32aad1eda903c065c081a00be728a01b70bd0e717d75f18d28a63bf47"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/bundle.json","state_url":"https://pith.science/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/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":"2026-05-24T22:16:06Z","links":{"resolver":"https://pith.science/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF","bundle":"https://pith.science/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/bundle.json","state":"https://pith.science/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZXMCHPUR7OR64G6TJDDRIKFZJF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZXMCHPUR7OR64G6TJDDRIKFZJF","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":"ca6ed1591fac3c217f4a431c524944ed47955ec7221a082f32cae36f849a599f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-26T19:00:00Z","title_canon_sha256":"465b3dac5f0f92006ed762396fc11a9ff4038a772abcc3e0bc2ebc9cfcce9620"},"schema_version":"1.0","source":{"id":"1811.10607","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10607","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10607v1","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10607","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"pith_short_12","alias_value":"ZXMCHPUR7OR6","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZXMCHPUR7OR64G6T","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZXMCHPUR","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:71ec1eb32aad1eda903c065c081a00be728a01b70bd0e717d75f18d28a63bf47","target":"graph","created_at":"2026-05-17T23:43:04Z","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 study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from dwarfs in a characteristic mass range by multiple episodes of supernova feedback (Di Cintio et al. 2017), group UDGs may also form by tidal puffing up and they become quiescent by ram-pressure stripping. The field and group UDGs share similar properties, independent of distance from the group centre. Their dark-matter haloes have ordinary spin parameters and centrally dominant dark-matter cores. Their stellar componen","authors_text":"2), (2) SCIPP, (3) San Jose State University, 4), (4) UCO, (5) NYU Abu Dhabi, 6), (6) MPIA, (7) Instituto de Astrofisica de Canarias, 8) ((1) HUJI, (8) Universidad de La Laguna), Aaron Dutton (5), Aaron J. Romanowsky (3, Andrea Maccio (5, Arianna Di Cintio (7, Avishai Dekel (1, Fangzhou Jiang (1), Jonathan Freundlich (1), UC Santa Cruz","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-26T19:00:00Z","title":"Formation of ultra-diffuse galaxies in the field and in galaxy groups"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10607","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":"sha256:859a7e32442292e31bf10b2f78da4cfefc92853f00a20cc6154a833220f4b789","target":"record","created_at":"2026-05-17T23:43:04Z","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":"ca6ed1591fac3c217f4a431c524944ed47955ec7221a082f32cae36f849a599f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-26T19:00:00Z","title_canon_sha256":"465b3dac5f0f92006ed762396fc11a9ff4038a772abcc3e0bc2ebc9cfcce9620"},"schema_version":"1.0","source":{"id":"1811.10607","kind":"arxiv","version":1}},"canonical_sha256":"cdd823be91fba3ee1bd348c71428b9495c7786fdba46f0134891e6cecaa6bf8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdd823be91fba3ee1bd348c71428b9495c7786fdba46f0134891e6cecaa6bf8c","first_computed_at":"2026-05-17T23:43:04.204078Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:04.204078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R3MW9jeOfvv6gnhMwNFq4gqoPxwoYMgiQo5qC1GZI9gzfXAOZ0Gqq2pSJ5p6lK/VBya6fd5m8f2nn0wEa0JkBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:04.204568Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.10607","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:859a7e32442292e31bf10b2f78da4cfefc92853f00a20cc6154a833220f4b789","sha256:71ec1eb32aad1eda903c065c081a00be728a01b70bd0e717d75f18d28a63bf47"],"state_sha256":"3d1900432eadf1e20cf23a7c66f0826381b16ba53c3161873568a120aaff8335"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u8MwoPRWsjJsOcK/31yjmsHf4jymIPZOPEf7jsdyKvn9kQk50BfJmJL+0iU2uyU+bTVRAsel+TqCFqaLCOnYAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T22:16:06.417850Z","bundle_sha256":"6d266b022fb5bc62306f81ae91195ad7dc3c9ca954be3bff8913f187035ed7c8"}}