Galaxy And Mass Assembly GAMA : The Dependence of Star Formation on Surface Brightness in Low Redshift Galaxies by S. Phillipps et al. on Wednesday 30 November

The star formation rate in galaxies is well known to correlate with stellar

mass (the `star-forming main sequence'). Here we extend this further to explore

any additional dependence on galaxy surface brightness, a proxy for stellar

mass surface density. We use a large sample of low redshift ($z \leq 0.08$)

galaxies from the GAMA survey which have both SED derived star formation rates

and photometric bulge-disc decompositions, the latter providing measures of

disc surface brightness and disc masses. Using two samples, one of galaxies

fitted by a single component with S\'{e}rsic index below 2 and one of the discs

from two-component fits, we find that once the overall mass dependence of star

formation rate is accounted for, there is no evidence in either sample for a

further dependence on stellar surface density.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.15998v1