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http://hdl.handle.net/20.500.12386/31013
Titolo: | A panchromatic spatially resolved analysis of nearby galaxies - I. Sub-kpc-scale main sequence in grand-design spirals | Autori: | Enia, A. Rodighiero, G. Morselli, L. CASASOLA, VIVIANA BIANCHI, SIMONE Rodriguez-Muñoz, L. Mancini, C. Renzini, A. Popesso, P. Cassata, P. Negrello, M. Franceschini, A. |
Data pubblicazione: | 2020 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 493 | Fascicolo: | 3 | Da pagina:: | 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 |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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staa433_c1.pdf | pp 4107-4114 | 4.95 MB | Adobe PDF | Visualizza/apri |
staa433_c2.pdf | p. 4115 | 4.15 MB | Adobe PDF | Visualizza/apri |
staa433_c3.pdf | pp. 4116-4125 | 8.9 MB | Adobe PDF | Visualizza/apri |
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