{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:QBJZGZAAPPBFJOXYUYVQ4EPDLP","short_pith_number":"pith:QBJZGZAA","schema_version":"1.0","canonical_sha256":"80539364007bc254baf8a62b0e11e35bffda889eaed7dd5a8a1f0ba368fa75cd","source":{"kind":"arxiv","id":"2302.12234","version":2},"attestation_state":"computed","paper":{"title":"Wet Compaction to a Blue Nugget: a Critical Phase in Galaxy Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Avishai Dekel, Daniel Ceverino, Fangzhou Jiang, Joel Primack, Jonathan Freundlich, Michael Kretschmer, Omri Ginzburg, Sandro Tacchella, Sharon Lapiner","submitted_at":"2023-02-23T18:53:48Z","abstract_excerpt":"We utilize high-resolution cosmological simulations to reveal that high-redshift galaxies tend to undergo a robust `wet compaction' event when near a `golden' stellar mass of $\\sim 10^{10} M_{\\odot}$. This is a gaseous shrinkage to a compact star-forming phase, a `blue nugget' (BN), followed by central quenching of star formation to a compact passive stellar bulge, a `red nugget' (RN), and a buildup of an extended gaseous disc and ring. Such nuggets are observed at cosmic noon and seed today's early-type galaxies. The compaction is triggered by a drastic loss of angular momentum due to, e.g., "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2302.12234","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-23T18:53:48Z","cross_cats_sorted":[],"title_canon_sha256":"a795b3e50d452cbe6309b50689e44f324fe663713bb5a995fc6b2297249ace80","abstract_canon_sha256":"807692592a00ca95fa29a81ced2b724d3ec53b192da27f65531561467b48c05f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:57:21.538193Z","signature_b64":"x5rNbTjUUIfMIu4RkUS9In3sIHWtYmUAUvc8RlRBg52B8oe5XrlL/YiYfVm7W2m2AxX7nzwFyvbIVZ47clIdAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"80539364007bc254baf8a62b0e11e35bffda889eaed7dd5a8a1f0ba368fa75cd","last_reissued_at":"2026-07-05T06:57:21.537709Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:57:21.537709Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Wet Compaction to a Blue Nugget: a Critical Phase in Galaxy Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Avishai Dekel, Daniel Ceverino, Fangzhou Jiang, Joel Primack, Jonathan Freundlich, Michael Kretschmer, Omri Ginzburg, Sandro Tacchella, Sharon Lapiner","submitted_at":"2023-02-23T18:53:48Z","abstract_excerpt":"We utilize high-resolution cosmological simulations to reveal that high-redshift galaxies tend to undergo a robust `wet compaction' event when near a `golden' stellar mass of $\\sim 10^{10} M_{\\odot}$. This is a gaseous shrinkage to a compact star-forming phase, a `blue nugget' (BN), followed by central quenching of star formation to a compact passive stellar bulge, a `red nugget' (RN), and a buildup of an extended gaseous disc and ring. Such nuggets are observed at cosmic noon and seed today's early-type galaxies. The compaction is triggered by a drastic loss of angular momentum due to, e.g., "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.12234","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/2302.12234/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2302.12234","created_at":"2026-07-05T06:57:21.537764+00:00"},{"alias_kind":"arxiv_version","alias_value":"2302.12234v2","created_at":"2026-07-05T06:57:21.537764+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.12234","created_at":"2026-07-05T06:57:21.537764+00:00"},{"alias_kind":"pith_short_12","alias_value":"QBJZGZAAPPBF","created_at":"2026-07-05T06:57:21.537764+00:00"},{"alias_kind":"pith_short_16","alias_value":"QBJZGZAAPPBFJOXY","created_at":"2026-07-05T06:57:21.537764+00:00"},{"alias_kind":"pith_short_8","alias_value":"QBJZGZAA","created_at":"2026-07-05T06:57:21.537764+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP","json":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP.json","graph_json":"https://pith.science/api/pith-number/QBJZGZAAPPBFJOXYUYVQ4EPDLP/graph.json","events_json":"https://pith.science/api/pith-number/QBJZGZAAPPBFJOXYUYVQ4EPDLP/events.json","paper":"https://pith.science/paper/QBJZGZAA"},"agent_actions":{"view_html":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP","download_json":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP.json","view_paper":"https://pith.science/paper/QBJZGZAA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2302.12234&json=true","fetch_graph":"https://pith.science/api/pith-number/QBJZGZAAPPBFJOXYUYVQ4EPDLP/graph.json","fetch_events":"https://pith.science/api/pith-number/QBJZGZAAPPBFJOXYUYVQ4EPDLP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP/action/storage_attestation","attest_author":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP/action/author_attestation","sign_citation":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP/action/citation_signature","submit_replication":"https://pith.science/pith/QBJZGZAAPPBFJOXYUYVQ4EPDLP/action/replication_record"}},"created_at":"2026-07-05T06:57:21.537764+00:00","updated_at":"2026-07-05T06:57:21.537764+00:00"}