{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:HT4QYAMA2Z3SCY7O4NJQSYK3OY","short_pith_number":"pith:HT4QYAMA","canonical_record":{"source":{"id":"2102.08383","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-16T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"cecd5482c68bacaf5ca0ec84eec85de8a030fb9298184ca72e4fbec0096f7130","abstract_canon_sha256":"2d0e012ed82f4c073e2cea83387544695bffe45f16e1fbb5eb581ca2437291b2"},"schema_version":"1.0"},"canonical_sha256":"3cf90c0180d6772163eee35309615b762dcf985e5d29ae4c7e324f23d13fd034","source":{"kind":"arxiv","id":"2102.08383","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.08383","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"arxiv_version","alias_value":"2102.08383v2","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.08383","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_12","alias_value":"HT4QYAMA2Z3S","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_16","alias_value":"HT4QYAMA2Z3SCY7O","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_8","alias_value":"HT4QYAMA","created_at":"2026-07-05T07:59:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:HT4QYAMA2Z3SCY7O4NJQSYK3OY","target":"record","payload":{"canonical_record":{"source":{"id":"2102.08383","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-16T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"cecd5482c68bacaf5ca0ec84eec85de8a030fb9298184ca72e4fbec0096f7130","abstract_canon_sha256":"2d0e012ed82f4c073e2cea83387544695bffe45f16e1fbb5eb581ca2437291b2"},"schema_version":"1.0"},"canonical_sha256":"3cf90c0180d6772163eee35309615b762dcf985e5d29ae4c7e324f23d13fd034","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:59:01.425740Z","signature_b64":"eH/VBZpHuI0UjMbn7SJxt/DPsIgxSzf1P9UcVuOgnbfRWJOWElPAuPfESq7Zh4W2posmzDT+nAFZsCpUhFKDDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3cf90c0180d6772163eee35309615b762dcf985e5d29ae4c7e324f23d13fd034","last_reissued_at":"2026-07-05T07:59:01.425220Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:59:01.425220Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.08383","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":"2026-07-05T07:59:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kwkrQUeZnaWTYcJzAtvEQctIBtV8RENi+tpd/cmbFXhaQ0mipNTCdmJlf20trg3fH6d/vg0iH386uBrZuIIyDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T23:30:33.632792Z"},"content_sha256":"3c8fcd940b27a7af6ebdb7c9ee5228ce0ebce569aaa2cb017fb75218c4dd09f2","schema_version":"1.0","event_id":"sha256:3c8fcd940b27a7af6ebdb7c9ee5228ce0ebce569aaa2cb017fb75218c4dd09f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:HT4QYAMA2Z3SCY7O4NJQSYK3OY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Comparison of Circumgalactic MgII Absorption between the TNG50 Simulation and the MEGAFLOW Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Daniel DeFelippis, Dylan Nelson, Federico Marinacci, Greg L. Bryan, Lars Hernquist, Nicolas F. Bouch\\'e, Shy Genel","submitted_at":"2021-02-16T19:00:00Z","abstract_excerpt":"The circumgalactic medium (CGM) contains information on gas flows around galaxies, such as accretion and supernova-driven winds, which are difficult to constrain from observations alone. Here, we use the high-resolution TNG50 cosmological magnetohydrodynamical simulation to study the properties and kinematics of the CGM around star-forming galaxies in $10^{11.5}-10^{12}\\;M_{\\odot}$ halos at $z\\simeq$ 1 using mock MgII absorption lines, which we generate by postprocessing halos to account for photoionization in the presence of a UV background. We find that the MgII gas is a very good tracer of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.08383","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.08383/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:59:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QQynv240C/uB+Kn6PuBaJwlLpP1ToytQvlPHRG4EyaJrwTkZHHnuGnQvig/Sd7VRqLQ4Gov3vaXVfhcNlo9nAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T23:30:33.633322Z"},"content_sha256":"6549f9b5cd16a334040c9c0e0e79b6f8b90e1b4bf20e43ca8fb000b6d53668ec","schema_version":"1.0","event_id":"sha256:6549f9b5cd16a334040c9c0e0e79b6f8b90e1b4bf20e43ca8fb000b6d53668ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/bundle.json","state_url":"https://pith.science/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/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":"2026-08-12T23:30:33Z","links":{"resolver":"https://pith.science/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY","bundle":"https://pith.science/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/bundle.json","state":"https://pith.science/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HT4QYAMA2Z3SCY7O4NJQSYK3OY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:HT4QYAMA2Z3SCY7O4NJQSYK3OY","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":"2d0e012ed82f4c073e2cea83387544695bffe45f16e1fbb5eb581ca2437291b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-16T19:00:00Z","title_canon_sha256":"cecd5482c68bacaf5ca0ec84eec85de8a030fb9298184ca72e4fbec0096f7130"},"schema_version":"1.0","source":{"id":"2102.08383","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.08383","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"arxiv_version","alias_value":"2102.08383v2","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.08383","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_12","alias_value":"HT4QYAMA2Z3S","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_16","alias_value":"HT4QYAMA2Z3SCY7O","created_at":"2026-07-05T07:59:01Z"},{"alias_kind":"pith_short_8","alias_value":"HT4QYAMA","created_at":"2026-07-05T07:59:01Z"}],"graph_snapshots":[{"event_id":"sha256:6549f9b5cd16a334040c9c0e0e79b6f8b90e1b4bf20e43ca8fb000b6d53668ec","target":"graph","created_at":"2026-07-05T07:59:01Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2102.08383/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The circumgalactic medium (CGM) contains information on gas flows around galaxies, such as accretion and supernova-driven winds, which are difficult to constrain from observations alone. Here, we use the high-resolution TNG50 cosmological magnetohydrodynamical simulation to study the properties and kinematics of the CGM around star-forming galaxies in $10^{11.5}-10^{12}\\;M_{\\odot}$ halos at $z\\simeq$ 1 using mock MgII absorption lines, which we generate by postprocessing halos to account for photoionization in the presence of a UV background. We find that the MgII gas is a very good tracer of ","authors_text":"Daniel DeFelippis, Dylan Nelson, Federico Marinacci, Greg L. Bryan, Lars Hernquist, Nicolas F. Bouch\\'e, Shy Genel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-16T19:00:00Z","title":"A Comparison of Circumgalactic MgII Absorption between the TNG50 Simulation and the MEGAFLOW Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.08383","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":"sha256:3c8fcd940b27a7af6ebdb7c9ee5228ce0ebce569aaa2cb017fb75218c4dd09f2","target":"record","created_at":"2026-07-05T07:59:01Z","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":"2d0e012ed82f4c073e2cea83387544695bffe45f16e1fbb5eb581ca2437291b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-16T19:00:00Z","title_canon_sha256":"cecd5482c68bacaf5ca0ec84eec85de8a030fb9298184ca72e4fbec0096f7130"},"schema_version":"1.0","source":{"id":"2102.08383","kind":"arxiv","version":2}},"canonical_sha256":"3cf90c0180d6772163eee35309615b762dcf985e5d29ae4c7e324f23d13fd034","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cf90c0180d6772163eee35309615b762dcf985e5d29ae4c7e324f23d13fd034","first_computed_at":"2026-07-05T07:59:01.425220Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:59:01.425220Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eH/VBZpHuI0UjMbn7SJxt/DPsIgxSzf1P9UcVuOgnbfRWJOWElPAuPfESq7Zh4W2posmzDT+nAFZsCpUhFKDDw==","signature_status":"signed_v1","signed_at":"2026-07-05T07:59:01.425740Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.08383","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c8fcd940b27a7af6ebdb7c9ee5228ce0ebce569aaa2cb017fb75218c4dd09f2","sha256:6549f9b5cd16a334040c9c0e0e79b6f8b90e1b4bf20e43ca8fb000b6d53668ec"],"state_sha256":"cef7c7ce86e1cad12b2adab32fde4538a12de10bad30531cdfb3adabe5eb5c47"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cGuKGFjyZTfXlU3TNZRFC2zrBOP49359SKpZLz95NQzDISmvZ6LlyBG/IRmNJjCAuxrZYsnL+llUKuOXgVudCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T23:30:33.637483Z","bundle_sha256":"9e258ea24e6033856fff89aad667cbd0d6a3d03142f682a513738870db032b65"}}