Galaxy And Mass Assembly (GAMA): the dependence of star formation on surface brightness in low-redshift galaxies

S. Phillipps, S. Bellstedt, M. N. Bremer, R. De Propris, P. A. James, S. Casura, J. Liske, B. W. Holwerda

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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 <= 0.08) galaxies from the Galaxy And Mass Assembly survey which have both spectral energy distribution (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 Sersic 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.
Original languageEnglish
Pages (from-to)5475-5482
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume518
Issue number4
DOIs
Publication statusPublished - 1 Feb 2023

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