{"paper":{"title":"SDSS-IV MaNGA: the indispensable role of bars in enhancing the central star formation of low-$z$ galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Amelia Fraser-McKelvie, Cheng Du, Cheng Li, David Wake, Enci Wang, Karen Masters, Lei Hao, Lihwai Lin, Lin Lin, Martin Bureau, Ting Xiao","submitted_at":"2020-05-20T05:49:32Z","abstract_excerpt":"We analyse two-dimensional maps and radial profiles of EW(H$\\alpha$), EW(H$\\delta_A$), and D$_n$(4000) of low-redshift galaxies using integral field spectroscopy from the MaNGA survey. Out of $\\approx1400$ nearly face-on late-type galaxies with a redshift $z<0.05$, we identify 121 \"turnover\" galaxies that each have a central upturn in EW(H$\\alpha$), EW(H$\\delta_A$) and/or a central drop in D$_n$(4000), indicative of ongoing/recent star formation. The turnover features are found mostly in galaxies with a stellar mass above $\\sim$10$^{10}$ M$_{\\odot}$ and NUV-$r$ colour less than $\\approx5$. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.09853","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/2005.09853/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"}