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

Phillipps, S, Bellstedt, S, Bremer, MN, De Propris, R, James, PA ORCID: 0000-0003-4131-5183, Casura, S, Liske, J and Holwerda, BW (2022) Galaxy And Mass Assembly (GAMA): the dependence of star formation on surface brightness in low-redshift galaxies. Monthly Notices of the Royal Astronomical Society, 518 (4). pp. 5475-5482. ISSN 0035-8711

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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.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press
Date of acceptance:	18 November 2022
Date of first compliant Open Access:	8 October 2024
Date Deposited:	08 Oct 2024 15:44
Last Modified:	04 Jul 2025 08:00
DOI or ID number:	10.1093/mnras/stac3440
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24458

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