Enia, A.A.EniaRodighiero, G.G.RodighieroMorselli, L.L.MorselliCASASOLA, VIVIANAVIVIANACASASOLABIANCHI, SIMONESIMONEBIANCHIRodriguez-Muñoz, L.L.Rodriguez-MuñozMancini, C.C.ManciniRenzini, A.A.RenziniPopesso, P.P.PopessoCassata, P.P.CassataNegrello, M.M.NegrelloFranceschini, A.A.Franceschini2021-09-012021-09-0120200035-8711http://hdl.handle.net/20.500.12386/31013We analyse the spatially resolved relation between stellar mass (M<SUB>⋆</SUB>) and star formation rate (SFR) in disc galaxies (i.e. the main sequence, MS). The studied sample includes eight nearby face-on grand-design spirals, e.g. the descendant of high-redshift, rotationally supported star-forming galaxies. We exploit photometric information over 23 bands, from the UV to the far-IR, from the publicly available DustPedia data base to build spatially resolved maps of stellar mass and SFRs on sub-galactic scales of 0.5-1.5 kpc, by performing a spectral energy distribution fitting procedure that accounts for both the observed and obscured star formation processes, over a wide range of internal galaxy environments (bulges, spiral arms, and outskirts). With more than 30 000 physical cells, we have derived a definition of the local spatially resolved MS per unit area for discs, log (Σ<SUB>SFR</SUB>) = 0.82log (Σ<SUB>*</SUB>) - 8.69. This is consistent with the bulk of recent results based on optical IFU, using the H α line emission as an SFR tracer. Our work extends the analysis at lower sensitivities in both M<SUB>⋆</SUB> and SFR surface densities, up to a factor of ∼10. The self-consistency of the MS relation over different spatial scales, from sub-galactic to galactic, as well as with a rescaled correlation obtained for high-redshift galaxies, clearly proves its universality.STAMPAenArticle10.1093/mnras/staa4332-s2.0-85085369199WOS:000526035600077https://academic.oup.com/mnras/article/493/3/4107/57399332020MNRAS.493.4107EFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation