{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ZWECUEXPL7M65MZQ4G6JF3JGWX","short_pith_number":"pith:ZWECUEXP","canonical_record":{"source":{"id":"1512.03064","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-09T21:00:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"bc32f6ba99a39a06dc5720a84f25e3f3e6dab42578d444f10cf56e25fbb70bc2","abstract_canon_sha256":"9f5bbcb0c2ceb3275be903f988df5addea50b16631c52a3d5021d84e1833c865"},"schema_version":"1.0"},"canonical_sha256":"cd882a12ef5fd9eeb330e1bc92ed26b5fe6a88363cbe43aa6622561ed1b0a401","source":{"kind":"arxiv","id":"1512.03064","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03064","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03064v2","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03064","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"pith_short_12","alias_value":"ZWECUEXPL7M6","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZWECUEXPL7M65MZQ","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZWECUEXP","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ZWECUEXPL7M65MZQ4G6JF3JGWX","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03064","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-09T21:00:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"bc32f6ba99a39a06dc5720a84f25e3f3e6dab42578d444f10cf56e25fbb70bc2","abstract_canon_sha256":"9f5bbcb0c2ceb3275be903f988df5addea50b16631c52a3d5021d84e1833c865"},"schema_version":"1.0"},"canonical_sha256":"cd882a12ef5fd9eeb330e1bc92ed26b5fe6a88363cbe43aa6622561ed1b0a401","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:16.865887Z","signature_b64":"ib6HRfGL8fF2PMZzB8mKStrDIL3UVJbYqBbRIiFvmL7Jrnj8XXBrP7o5xK5YyfGCDZq9hbRrBpnIoxAPrlxjDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd882a12ef5fd9eeb330e1bc92ed26b5fe6a88363cbe43aa6622561ed1b0a401","last_reissued_at":"2026-05-18T01:16:16.865395Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:16.865395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03064","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":"2026-05-18T01:16:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ytJ6k6RuMRSs0e0NnDprW8HW8cQv9PM3U57d/zSVI4KZzqqxicDjWgR0oPEtkU/A9tOlHx96LR0K2gOGlIOEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:00:44.802266Z"},"content_sha256":"9cd39797df48b9a0b9d8d4c9c14b1d4b8bbdd891f9806a04603675bfe4f47679","schema_version":"1.0","event_id":"sha256:9cd39797df48b9a0b9d8d4c9c14b1d4b8bbdd891f9806a04603675bfe4f47679"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ZWECUEXPL7M65MZQ4G6JF3JGWX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the stellar halo metallicity profile of Milky Way-like galaxies in the Auriga simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Antonela Monachesi, Carlos S. Frenk, Facundo A. Gomez, Federico Marinacci, Guinevere Kauffmann, Robert J. J. Grand, R\\\"udiger Pakmor, Volker Springel","submitted_at":"2015-12-09T21:00:06Z","abstract_excerpt":"A recent observational study of haloes of nearby Milky Way-like galaxies shows that only half (four out of eight) of the current sample exhibits strong negative metallicity ([Fe/H]) gradients. This is at odds with predictions from hydrodynamical simulations where such gradients are ubiquitous. In this Letter, we use high resolution cosmological hydrodynamical simulations to study the [Fe/H] distribution of galactic haloes. We find that kinematically selected stellar haloes, including both in-situ and accreted particles, have an oblate [Fe/H] distribution. Spherical [Fe/H] radial profiles show "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03064","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":"2026-05-18T01:16:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HWH383M1oI8hHr4QZstI0VgwsOb1gjTRAA99aMGsxqyem8/yKDoVP/zgHZB5ESJ5MoiQm/iGTZSDNvtqX/l/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:00:44.802658Z"},"content_sha256":"7980fa0313c4562cc1e968ef1573142305894fe9a18dc980ed8a73cfa78fc939","schema_version":"1.0","event_id":"sha256:7980fa0313c4562cc1e968ef1573142305894fe9a18dc980ed8a73cfa78fc939"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/bundle.json","state_url":"https://pith.science/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/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":"2026-05-26T06:00:44Z","links":{"resolver":"https://pith.science/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX","bundle":"https://pith.science/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/bundle.json","state":"https://pith.science/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZWECUEXPL7M65MZQ4G6JF3JGWX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ZWECUEXPL7M65MZQ4G6JF3JGWX","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":"9f5bbcb0c2ceb3275be903f988df5addea50b16631c52a3d5021d84e1833c865","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-09T21:00:06Z","title_canon_sha256":"bc32f6ba99a39a06dc5720a84f25e3f3e6dab42578d444f10cf56e25fbb70bc2"},"schema_version":"1.0","source":{"id":"1512.03064","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03064","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03064v2","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03064","created_at":"2026-05-18T01:16:16Z"},{"alias_kind":"pith_short_12","alias_value":"ZWECUEXPL7M6","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZWECUEXPL7M65MZQ","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZWECUEXP","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:7980fa0313c4562cc1e968ef1573142305894fe9a18dc980ed8a73cfa78fc939","target":"graph","created_at":"2026-05-18T01:16:16Z","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 recent observational study of haloes of nearby Milky Way-like galaxies shows that only half (four out of eight) of the current sample exhibits strong negative metallicity ([Fe/H]) gradients. This is at odds with predictions from hydrodynamical simulations where such gradients are ubiquitous. In this Letter, we use high resolution cosmological hydrodynamical simulations to study the [Fe/H] distribution of galactic haloes. We find that kinematically selected stellar haloes, including both in-situ and accreted particles, have an oblate [Fe/H] distribution. Spherical [Fe/H] radial profiles show ","authors_text":"Antonela Monachesi, Carlos S. Frenk, Facundo A. Gomez, Federico Marinacci, Guinevere Kauffmann, Robert J. J. Grand, R\\\"udiger Pakmor, Volker Springel","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-09T21:00:06Z","title":"On the stellar halo metallicity profile of Milky Way-like galaxies in the Auriga simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03064","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":"sha256:9cd39797df48b9a0b9d8d4c9c14b1d4b8bbdd891f9806a04603675bfe4f47679","target":"record","created_at":"2026-05-18T01:16:16Z","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":"9f5bbcb0c2ceb3275be903f988df5addea50b16631c52a3d5021d84e1833c865","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-09T21:00:06Z","title_canon_sha256":"bc32f6ba99a39a06dc5720a84f25e3f3e6dab42578d444f10cf56e25fbb70bc2"},"schema_version":"1.0","source":{"id":"1512.03064","kind":"arxiv","version":2}},"canonical_sha256":"cd882a12ef5fd9eeb330e1bc92ed26b5fe6a88363cbe43aa6622561ed1b0a401","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd882a12ef5fd9eeb330e1bc92ed26b5fe6a88363cbe43aa6622561ed1b0a401","first_computed_at":"2026-05-18T01:16:16.865395Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:16.865395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ib6HRfGL8fF2PMZzB8mKStrDIL3UVJbYqBbRIiFvmL7Jrnj8XXBrP7o5xK5YyfGCDZq9hbRrBpnIoxAPrlxjDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:16.865887Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03064","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9cd39797df48b9a0b9d8d4c9c14b1d4b8bbdd891f9806a04603675bfe4f47679","sha256:7980fa0313c4562cc1e968ef1573142305894fe9a18dc980ed8a73cfa78fc939"],"state_sha256":"8af6c64dd23ba77414fb078799413309637d02f667aadfd03637759bb0728ab1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sxNl1KzuirJl7pz/fAs+dhJ5Jf2jMNmByJ6Jy0Itzftu2U1hAp2lp5TgmC2wsbc68SaUInkdBQXlY9vrBm0zAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T06:00:44.805962Z","bundle_sha256":"09bd54d73d79e27e71b2e30ce71f0574f36ba52fafb10d9bf1ca617df60ab88f"}}