Galaxy And Mass Assembly (GAMA): M-star-R-e relations of z=0 bulges, discs and spheroids
- Lange, R
- Moffett, AJ
- Driver, SP
- Robotham, ASG
- Lagos, CDP
- Kelvin, LS
- Conselice, C
- Margalef-Bentabol, B
- Alpaslan, M
- Baldry, I
- Bland-Hawthorn, J
- Bremer, M
- Brough, S
- Cluve, M
- Colless, M
- Davies, LJM
- Häußler, B
- Holwerda, BW
- Hopkins, AM
- Kafle, PR
- Kennedy, R
- Liske, J
- Phillipps, S
- Popescu, CC
- Taylor, EN
- Tuffs, R
- Kampen, EV
- Wright, AH
DOIAbstract
We perform automated bulge + disc decomposition on a sample of ~7500 galaxies from the Galaxy And Mass Assembly (GAMA) survey in the redshift range of 0.002<z<0.06 using SIGMA, a wrapper around GALFIT3. To achieve robust profile measurements we use a novel approach of repeatedly fitting the galaxies, varying the input parameters to sample a large fraction of the input parameter space. Using this method we reduce the catastrophic failure rate significantly and verify the confidence in the fit independently of \chi^2 Additionally, using the median of the final fitting values and the 16^{th}$ and 84^{th} percentile produces more realistic error estimates than those provided by GALFIT, which are known to be underestimated. We use the results of...
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