{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/mapping-the-stellar-population-and-gas","title":"Mapping the stellar population and gas excitation of MaNGA galaxies with MEGACUBES. Results for AGN versus control sample","arxiv_id":"2307.11474","date":"2023-07-21","proceeding":null,"authors":["Rogério Riffel","Nicolas D. Mallmann","Sandro B. Rembold","Gabriele S. Ilha","Rogemar A. Riffel","Thaisa Storchi-Bergmann","Daniel Ruschel-Dutra","Alexandre Vazdekis","Ignacio Martín-Navarro","Jaderson S. Schimoia","Cristina Ramos Almeida","Luiz N. da Costa","Glauber C. Vila-Verde","Lara Gatto"],"abstract":"We present spaxel-by-spaxel stellar population fits for the $\\sim$10 thousand MaNGA datacubes. We provide multiple extension fits files, nominated as MEGACUBES, with maps of several properties as well as emission-line profiles that are provided for each spaxel. All the MEGACUBES are available through a web interface (\\url{https://manga.linea.org.br/} or \\url{http://www.if.ufrgs.br/~riffel/software/megacubes/}). We also defined a final Active Galactic Nuclei (AGN) sample, as well as a control sample matching the AGN host galaxy properties. We have analysed the stellar populations and spatially resolved emission-line diagnostic diagrams of these AGNs and compared them with the control galaxies sample. We find that the relative fractions of young ($t \\leq $56 Myr) and intermediate-age (100 Myr $\\leq t \\leq$ 2 Gyr) show predominantly a positive gradient for both AGNs and controls. The relative fraction of intermediate-age stellar population is higher in AGN hosts when compared to the control sample, and this difference becomes larger for higher [O III] luminosity AGNs. We attribute this to the fact that extra gas is available in these more luminous sources and that it most likely originates from mass-loss from the intermediate-age stars. The spatially resolved diagnostic diagrams reveal that the AGN emission is concentrated in the inner 0.5 $R_e$ (effective radius) region of the galaxies, showing that the AGN classification is aperture dependent and that emission-line ratios have to be taken together with the H$\\alpha$ equivalent width for proper activity classification. We present a composite ``BPT+WHAN\" diagram that produces a more comprehensive mapping of the gas excitation.","url_abs":"https://arxiv.org/abs/2307.11474v2","url_pdf":"https://arxiv.org/pdf/2307.11474v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"mapping-the-stellar-population-and-gas","repo_url":"https://github.com/ndmallmann/urutau","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}