{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T19:25:20Z","timestamp":1776194720635,"version":"3.50.1"},"reference-count":46,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2025,3,21]],"date-time":"2025-03-21T00:00:00Z","timestamp":1742515200000},"content-version":"vor","delay-in-days":20,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["A&amp;A"],"accepted":{"date-parts":[[2025,2,6]]},"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:p><jats:italic>Aims<\/jats:italic>. We present a dedicated automated pipeline to construct spatially resolved emission H<jats:italic>\u03b1<\/jats:italic>+[NII] maps and to derive the spectral energy distributions (SEDs) in 12 optical filters (five broad and seven narrow and medium) of H<jats:italic>\u03b1<\/jats:italic> emission line regions in nearby galaxies (z &lt; 0.0165) observed by the Javalambre Photometric Local Universe Survey (J-PLUS).<\/jats:p>\n<jats:p><jats:italic>Methods<\/jats:italic>. We used the <jats:italic>J<\/jats:italic>0660 filter of 140 \u00c5 width centered at 6600 \u00c5 to trace H <jats:italic>\u03b1<\/jats:italic> + [NII] emission, and <jats:italic>r<\/jats:italic> and <jats:italic>i<\/jats:italic> broad bands were used to estimate the stellar continuum. We created pure emission line images after the continnum subtraction, where the H<jats:italic>\u03b1<\/jats:italic> emission line regions were detected. This method was also applied to integral field unit (IFU) spectroscopic data from PHANGS-MUSE, CALIFA, and MaNGA surveys by building synthetic narrow bands based on J-PLUS filters. The studied sample includes the cross-matched catalog of these IFU surveys with the J-PLUS third data release (DR3), amounting to two PHANGS-MUSE, 78 CALIFA, and 78 MaNGA galaxies at <jats:italic>z<\/jats:italic> &lt; 0.0165, respectively.<\/jats:p>\n<jats:p><jats:italic>Results<\/jats:italic>. We compared the H<jats:italic>\u03b1<\/jats:italic>+[NII] radial profiles from J-PLUS and the IFU surveys, finding good agreement within the expected uncertainties. We also compared the SEDs from the emission line regions detected in J-PLUS images, reproducing the main spectral features present in the spectroscopic data. Finally, we compared the emission fluxes from the J-PLUS and IFU surveys accounting for scale differences, finding a difference of only 2% with a dispersion of 7% in the measurements.<\/jats:p>\n<jats:p><jats:italic>Conclusions<\/jats:italic>. The J-PLUS data provide reliable spatially resolved H<jats:italic>\u03b1<\/jats:italic>+[NII] emission maps for nearby galaxies. We provide the J-PLUS DR3 catalog for the 158 galaxies with IFU data, including emission maps, SEDs of star-forming clumps, and radial profiles.<\/jats:p>","DOI":"10.1051\/0004-6361\/202453633","type":"journal-article","created":{"date-parts":[[2025,2,26]],"date-time":"2025-02-26T19:44:29Z","timestamp":1740599069000},"page":"A200","source":"Crossref","is-referenced-by-count":6,"title":["J-PLUS: Spectroscopic validation of H<i>\u03b1<\/i> emission line maps in spatially resolved galaxies"],"prefix":"10.1051","volume":"695","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5864-7195","authenticated-orcid":false,"given":"P. 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