The resolved scaling relations in DustPedia: Zooming in on the local Universe
Viviana Casasola, Simone Bianchi, Laura Magrini, Aleksandr V., Mosenkov, Francesco Salvestrini, Maarten Baes, Francesco Calura, Letizia P., Cassara', Christopher J. R. Clark, Edvige Corbelli, Jacopo Fritz, Frederic, Galliano, Elisabetta Liuzzo, Suzanne Madden, Angelos Nersesian

TL;DR
This study analyzes spatially resolved scaling relations in 18 DustPedia galaxies, revealing how local processes influence galaxy properties and supporting the self-regulation of star formation across different scales.
Contribution
It provides the first homogeneous analysis of subgalactic scaling relations in a large sample, highlighting scale-dependent behaviors and the importance of local processes in galaxy evolution.
Findings
Dust-total gas SR is consistent across all scales.
Dust-H2 and dust-HI SRs are good at subkpc and total scales, respectively.
Galactic properties show heterogeneity, emphasizing the need for resolved studies.
Abstract
We perform a homogeneous analysis of an unprecedented set of spatially resolved scaling relations (SRs) between ISM components and other properties in the range of scales 0.3-3.4 kpc. We also study some ratios: dust-to-stellar, dust-to-gas, and dust-to-metal. We use a sample of 18 large, spiral, face-on DustPedia galaxies. All the SRs are moderate/strong correlations except the dust-HI SR that does not exist or is weak for most galaxies. The SRs do not have a universal form but each galaxy is characterized by distinct correlations, affected by local processes and galaxy peculiarities. The SRs hold starting from 0.3 kpc, and if a breaking down scale exists it is < 0.3 kpc. By evaluating all galaxies at 3.4 kpc, differences due to peculiarities of individual galaxies are cancelled out and the corresponding SRs are consistent with those of whole galaxies. By comparing subgalactic and…
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