The local and global relations between $\Sigma_\star$ , $\Sigma_{\rm SFR}$ and $\Sigma_{\rm mol}$ that regulate star-formation

TL;DR

This paper investigates the scale-dependent relationships between stellar mass, star-formation rate, and molecular gas in galaxies using integral field spectroscopy and CO data, addressing their universality and scale-breaking points.

Contribution

It provides a comparative analysis of these fundamental relations across different spatial scales in galaxies, utilizing new integral field spectroscopy and CO observations.

Findings

Relations hold at galaxy-wide scales but break at smaller scales.

Scale dependence varies with galaxy type and scale.

New insights into the universality of star-formation relations.

Abstract

Star-formation is one of the main processes that shape galaxies, defining its stellar population and metallicity production and enrichment. It is nowadays known that this process is ruled by a set of relations that connect three parameters: the molecular gas mass, the stellar mass and the star-formation rate itself. These relations are fulfilled at a wide range of scales in galaxies, from galaxy wide to kpc-scales. At which scales they are broken, and how universal they are (i.e., if they change at different scales or for different galaxy types) it is still an open question. We explore here how those relations compare at different scales using as proxy the new analysis done using Integral Field Spectroscopy data and CO observations data from the EDGE-CALIFA survey and the AMUSSING++ compilation.