{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:WOHM3GOSK4RNQ66K6JFTNNQTM4","short_pith_number":"pith:WOHM3GOS","schema_version":"1.0","canonical_sha256":"b38ecd99d25722d87bcaf24b36b6136716e7127bd094868b42887fee4001c86d","source":{"kind":"arxiv","id":"1801.07368","version":1},"attestation_state":"computed","paper":{"title":"Spatially-unresolved SED fitting can underestimate galaxy masses: a solution to the missing mass problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Marcin Sawicki, Robert Sorba","submitted_at":"2018-01-23T01:50:34Z","abstract_excerpt":"We perform spatially-resolved, pixel-by-pixel SED fitting on galaxies up to $z\\sim2.5$ in the Hubble Extreme Deep Field (XDF). Comparing stellar mass estimates from spatially resolved and spatially unresolved photometry we find that unresolved masses can be systematically underestimated by factors of up to 5. The ratio of the unresolved to resolved mass measurement depends on the galaxy's specific star formation rate (sSFR): at low sSFRs the bias is small, but above sSFR$\\ \\sim 10^{-9.5}$ yr$^{-1}$ the discrepancy increases rapidly such that galaxies with sSFRs$\\ \\sim 10^{-8}$ yr$^{-1}$ have u"},"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":"1801.07368","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-23T01:50:34Z","cross_cats_sorted":[],"title_canon_sha256":"119f84a69debda0c43a9ac206ebc28a69914398827a7a1027c50c3204a415b23","abstract_canon_sha256":"6349b9015cf0186eaf5ced32201ab51157cef5d82b12edcda4747af925386711"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:44.855510Z","signature_b64":"nisU4X1DOLug9P0fMAODQkbCODx8VJZuR/8bEX111TZ1lt8b8IAksB+23lc3r5nftAcRQZdKAkEeJKQ2y9rmAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b38ecd99d25722d87bcaf24b36b6136716e7127bd094868b42887fee4001c86d","last_reissued_at":"2026-05-18T00:23:44.854903Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:44.854903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spatially-unresolved SED fitting can underestimate galaxy masses: a solution to the missing mass problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Marcin Sawicki, Robert Sorba","submitted_at":"2018-01-23T01:50:34Z","abstract_excerpt":"We perform spatially-resolved, pixel-by-pixel SED fitting on galaxies up to $z\\sim2.5$ in the Hubble Extreme Deep Field (XDF). Comparing stellar mass estimates from spatially resolved and spatially unresolved photometry we find that unresolved masses can be systematically underestimated by factors of up to 5. The ratio of the unresolved to resolved mass measurement depends on the galaxy's specific star formation rate (sSFR): at low sSFRs the bias is small, but above sSFR$\\ \\sim 10^{-9.5}$ yr$^{-1}$ the discrepancy increases rapidly such that galaxies with sSFRs$\\ \\sim 10^{-8}$ yr$^{-1}$ have u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07368","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1801.07368","created_at":"2026-05-18T00:23:44.854989+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.07368v1","created_at":"2026-05-18T00:23:44.854989+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07368","created_at":"2026-05-18T00:23:44.854989+00:00"},{"alias_kind":"pith_short_12","alias_value":"WOHM3GOSK4RN","created_at":"2026-05-18T12:33:01.666342+00:00"},{"alias_kind":"pith_short_16","alias_value":"WOHM3GOSK4RNQ66K","created_at":"2026-05-18T12:33:01.666342+00:00"},{"alias_kind":"pith_short_8","alias_value":"WOHM3GOS","created_at":"2026-05-18T12:33:01.666342+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/WOHM3GOSK4RNQ66K6JFTNNQTM4","json":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4.json","graph_json":"https://pith.science/api/pith-number/WOHM3GOSK4RNQ66K6JFTNNQTM4/graph.json","events_json":"https://pith.science/api/pith-number/WOHM3GOSK4RNQ66K6JFTNNQTM4/events.json","paper":"https://pith.science/paper/WOHM3GOS"},"agent_actions":{"view_html":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4","download_json":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4.json","view_paper":"https://pith.science/paper/WOHM3GOS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.07368&json=true","fetch_graph":"https://pith.science/api/pith-number/WOHM3GOSK4RNQ66K6JFTNNQTM4/graph.json","fetch_events":"https://pith.science/api/pith-number/WOHM3GOSK4RNQ66K6JFTNNQTM4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4/action/storage_attestation","attest_author":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4/action/author_attestation","sign_citation":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4/action/citation_signature","submit_replication":"https://pith.science/pith/WOHM3GOSK4RNQ66K6JFTNNQTM4/action/replication_record"}},"created_at":"2026-05-18T00:23:44.854989+00:00","updated_at":"2026-05-18T00:23:44.854989+00:00"}