{"paper":{"title":"Structural and Stellar Population Properties vs. Bulge Types in Sloan Digital Sky Survey Central Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aldo Rodriguez-Puebla, David C. Koo, Guillermo Barro, Hassen M. Yesuf, Jerome J. Fang, Joanna Woo, Joel R. Primack, Lin Lin, M. Huertas-Company, Shude Mao, S. M. Faber, Viraj Pandya, Yicheng Guo, Yifei Luo, Zhu Chen","submitted_at":"2019-08-21T18:00:03Z","abstract_excerpt":"This paper studies pseudo-bulges (P-bulges) and classical bulges (C-bulges) in Sloan Digital Sky Survey central galaxies using the new bulge indicator $\\Delta\\Sigma_1$, which measures relative central stellar-mass surface density within 1 kpc. We compare $\\Delta\\Sigma_1$ to the established bulge-type indicator $\\Delta\\langle\\mu_e\\rangle$ from Gadotti (2009) and show that classifying by $\\Delta\\Sigma_1$ agrees well with $\\Delta\\langle\\mu_e\\rangle$. $\\Delta\\Sigma_1$ requires no bulge-disk decomposition and can be measured on SDSS images out to $z = 0.07$. Bulge types using it are mapped onto twe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08055","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/1908.08055/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"}