التفاصيل البيبلوغرافية
| العنوان: |
Galaxy And Mass Assembly (GAMA): the dependence of star formation on surface brightness in low-redshift galaxies. |
| المؤلفون: |
Phillipps, S, Bellstedt, S, Bremer, M N, De Propris, R, James, P A, Casura, S, Liske, J, Holwerda, B W |
| المصدر: |
Monthly Notices of the Royal Astronomical Society; Feb2023, Vol. 518 Issue 4, p5475-5482, 8p |
| مصطلحات موضوعية: |
SURFACE brightness (Astronomy), GALACTIC magnitudes, STAR formation, STELLAR density (Stellar population), SPECTRAL energy distribution, STELLAR mass |
| مستخلص: |
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 Sérsic 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. [ABSTRACT FROM AUTHOR] |
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