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|Title:||A panchromatic spatially resolved analysis of nearby galaxies - I. Sub-kpc-scale main sequence in grand-design spirals||Authors:||Enia, A.
|Issue Date:||2020||Journal:||MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY||Number:||493||Issue:||3||First Page:||4107||Abstract:||We 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.||URI:||http://hdl.handle.net/20.500.12386/31013||URL:||https://academic.oup.com/mnras/article/493/3/4107/5739933||ISSN:||0035-8711||DOI:||10.1093/mnras/staa433||Bibcode ADS:||2020MNRAS.493.4107E||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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|staa433_c1.pdf||pp 4107-4114||4.95 MB||Adobe PDF||View/Open|
|staa433_c2.pdf||p. 4115||4.15 MB||Adobe PDF||View/Open|
|staa433_c3.pdf||pp. 4116-4125||8.9 MB||Adobe PDF||View/Open|
checked on Sep 16, 2021
checked on Sep 16, 2021
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