J-PLUS Halpha emission line maps of galaxies

We present a dedicated automated pipeline to construct spatially resolved emission H{alpha}+[NII] maps and to derive the spectral energy distributions (SEDs) in 12 optical filters (five broad and seven narrow/medium) of H{alpha} emission line regions in nearby galaxies (z<0.0165) observed by the Javalambre Photometric Local Universe Survey (J-PLUS). We used the J0660 filter of 140{AA} width centered at 6600{AA} to trace H{alpha}+[NII] emission and r and i broad bands were used to estimate the stellar continuum.

We create pure emission line images after the continuum subtraction, where the H{alpha} 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 J-PLUS third data release (DR3), amounting to 2 PHANGS-MUSE, 78 CALIFA, and 78 MaNGA galaxies at z<0.0165, respectively.