{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:LD7XJQRZHSTPGUR6C22ZDILZLN","short_pith_number":"pith:LD7XJQRZ","schema_version":"1.0","canonical_sha256":"58ff74c2393ca6f3523e16b591a1795b4f64ad3286c0ca19cd012a2e982b975d","source":{"kind":"arxiv","id":"1204.4846","version":2},"attestation_state":"computed","paper":{"title":"Duty Cycle and the Increasing Star Formation History of z>=6 Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) Kentucky), Jason Jaacks (1), Jun-Hwan Choi (2) ((1) UNLV, Kentaro Nagamine (1)","submitted_at":"2012-04-21T23:10:27Z","abstract_excerpt":"We examine the duty cycle and the history of star formation (SFH) for high-redshift galaxies at z>=6 using cosmological hydrodynamic simulations. We find that, even though individual galaxies have bursty SFH, the averaged SFH between z~15 to z=6 can be characterized well by either an exponentially increasing functional form with characteristic time-scales of 70 Myr to 200 Myr for galaxies with stellar masses Ms~10^6 Msun to >10^10 Msun respectively, or by a simple power-law form which exhibits a similar mass dependent time-scales. Using the SFH of individual galaxies, we measure the duty cycle"},"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":"1204.4846","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-21T23:10:27Z","cross_cats_sorted":[],"title_canon_sha256":"bee20b684b7a492ac1fe1aadf780ed41647bb169165f2c36793b9250173d2133","abstract_canon_sha256":"db5b3dec2e12446b0b1a021105720515bf3a513d92cfe2f50fba09c713f66ee5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:47.725566Z","signature_b64":"lelPV/KenGmrBZNXy1lI9jN+dmGxNREjFL12GD7RFZwDFBNwmSSgznjIVIPkUuTF48fYQmUCfGyoKY1myGLwDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58ff74c2393ca6f3523e16b591a1795b4f64ad3286c0ca19cd012a2e982b975d","last_reissued_at":"2026-05-18T01:57:47.724841Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:47.724841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Duty Cycle and the Increasing Star Formation History of z>=6 Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) Kentucky), Jason Jaacks (1), Jun-Hwan Choi (2) ((1) UNLV, Kentaro Nagamine (1)","submitted_at":"2012-04-21T23:10:27Z","abstract_excerpt":"We examine the duty cycle and the history of star formation (SFH) for high-redshift galaxies at z>=6 using cosmological hydrodynamic simulations. We find that, even though individual galaxies have bursty SFH, the averaged SFH between z~15 to z=6 can be characterized well by either an exponentially increasing functional form with characteristic time-scales of 70 Myr to 200 Myr for galaxies with stellar masses Ms~10^6 Msun to >10^10 Msun respectively, or by a simple power-law form which exhibits a similar mass dependent time-scales. Using the SFH of individual galaxies, we measure the duty cycle"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4846","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1204.4846","created_at":"2026-05-18T01:57:47.724936+00:00"},{"alias_kind":"arxiv_version","alias_value":"1204.4846v2","created_at":"2026-05-18T01:57:47.724936+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4846","created_at":"2026-05-18T01:57:47.724936+00:00"},{"alias_kind":"pith_short_12","alias_value":"LD7XJQRZHSTP","created_at":"2026-05-18T12:27:14.488303+00:00"},{"alias_kind":"pith_short_16","alias_value":"LD7XJQRZHSTPGUR6","created_at":"2026-05-18T12:27:14.488303+00:00"},{"alias_kind":"pith_short_8","alias_value":"LD7XJQRZ","created_at":"2026-05-18T12:27:14.488303+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/LD7XJQRZHSTPGUR6C22ZDILZLN","json":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN.json","graph_json":"https://pith.science/api/pith-number/LD7XJQRZHSTPGUR6C22ZDILZLN/graph.json","events_json":"https://pith.science/api/pith-number/LD7XJQRZHSTPGUR6C22ZDILZLN/events.json","paper":"https://pith.science/paper/LD7XJQRZ"},"agent_actions":{"view_html":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN","download_json":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN.json","view_paper":"https://pith.science/paper/LD7XJQRZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1204.4846&json=true","fetch_graph":"https://pith.science/api/pith-number/LD7XJQRZHSTPGUR6C22ZDILZLN/graph.json","fetch_events":"https://pith.science/api/pith-number/LD7XJQRZHSTPGUR6C22ZDILZLN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN/action/storage_attestation","attest_author":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN/action/author_attestation","sign_citation":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN/action/citation_signature","submit_replication":"https://pith.science/pith/LD7XJQRZHSTPGUR6C22ZDILZLN/action/replication_record"}},"created_at":"2026-05-18T01:57:47.724936+00:00","updated_at":"2026-05-18T01:57:47.724936+00:00"}