{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:ZUG6IHIXW7XCDST2IX27HGHRYM","short_pith_number":"pith:ZUG6IHIX","schema_version":"1.0","canonical_sha256":"cd0de41d17b7ee21ca7a45f5f398f1c32eb38114fa06097d31c5f7302aa7724f","source":{"kind":"arxiv","id":"1507.01210","version":1},"attestation_state":"computed","paper":{"title":"Systematic variation of central mass density slope in early-type galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. J. Romanowsky, C. Tortora, F. La Barbera, I. Ferreras, N. R. Napolitano, R. R. de Carvalho","submitted_at":"2015-07-05T12:21:08Z","abstract_excerpt":"We study the total density distribution in the central regions ($<\\, 1$ effective radius, $R_{\\rm e}$) of early-type galaxies (ETGs), using data from the SPIDER survey. We model each galaxy with two components (dark matter halo + stars), exploring different assumptions for the dark matter (DM) halo profile, and leaving stellar mass-to-light ($M_{\\rm \\star}/L$) ratios as free fitting parameters to the data. For a Navarro et al. (1996) profile, the slope of the total mass profile is non-universal. For the most massive and largest ETGs, the profile is isothermal in the central regions ($\\sim R_{\\"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1507.01210","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-05T12:21:08Z","cross_cats_sorted":[],"title_canon_sha256":"c99a3d2babf6c49621ce05120afe57ae661d2d3b7f57a0787cc5cf04290ab802","abstract_canon_sha256":"d85aec62a5efd7117f0122f6b788bb310b9e8a45f888711e7fa4a0e773319081"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:46.846290Z","signature_b64":"rYPpVw/clh3D4MoQWyPsRC9R3EPHXn/Jd7JCPAfPLVQBXSHPKaDphAAIYuyWHc8GYUOxPehMih/8gxoDTMurCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd0de41d17b7ee21ca7a45f5f398f1c32eb38114fa06097d31c5f7302aa7724f","last_reissued_at":"2026-05-18T01:11:46.845949Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:46.845949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Systematic variation of central mass density slope in early-type galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. J. Romanowsky, C. Tortora, F. La Barbera, I. Ferreras, N. R. Napolitano, R. R. de Carvalho","submitted_at":"2015-07-05T12:21:08Z","abstract_excerpt":"We study the total density distribution in the central regions ($<\\, 1$ effective radius, $R_{\\rm e}$) of early-type galaxies (ETGs), using data from the SPIDER survey. We model each galaxy with two components (dark matter halo + stars), exploring different assumptions for the dark matter (DM) halo profile, and leaving stellar mass-to-light ($M_{\\rm \\star}/L$) ratios as free fitting parameters to the data. For a Navarro et al. (1996) profile, the slope of the total mass profile is non-universal. For the most massive and largest ETGs, the profile is isothermal in the central regions ($\\sim R_{\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01210","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":"1507.01210","created_at":"2026-05-18T01:11:46.846005+00:00"},{"alias_kind":"arxiv_version","alias_value":"1507.01210v1","created_at":"2026-05-18T01:11:46.846005+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01210","created_at":"2026-05-18T01:11:46.846005+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZUG6IHIXW7XC","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZUG6IHIXW7XCDST2","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZUG6IHIX","created_at":"2026-05-18T12:29:52.810259+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/ZUG6IHIXW7XCDST2IX27HGHRYM","json":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM.json","graph_json":"https://pith.science/api/pith-number/ZUG6IHIXW7XCDST2IX27HGHRYM/graph.json","events_json":"https://pith.science/api/pith-number/ZUG6IHIXW7XCDST2IX27HGHRYM/events.json","paper":"https://pith.science/paper/ZUG6IHIX"},"agent_actions":{"view_html":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM","download_json":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM.json","view_paper":"https://pith.science/paper/ZUG6IHIX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1507.01210&json=true","fetch_graph":"https://pith.science/api/pith-number/ZUG6IHIXW7XCDST2IX27HGHRYM/graph.json","fetch_events":"https://pith.science/api/pith-number/ZUG6IHIXW7XCDST2IX27HGHRYM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM/action/storage_attestation","attest_author":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM/action/author_attestation","sign_citation":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM/action/citation_signature","submit_replication":"https://pith.science/pith/ZUG6IHIXW7XCDST2IX27HGHRYM/action/replication_record"}},"created_at":"2026-05-18T01:11:46.846005+00:00","updated_at":"2026-05-18T01:11:46.846005+00:00"}