TY - JOUR
T1 - Galaxy And Mass Assembly (GAMA): M⋆--Re relations of z = 0 bulges, discs and spheroids
AU - Lange, Rebecca
AU - Moffett, Amanda J.
AU - Driver, Simon P.
AU - Robotham, Aaron S. G.
AU - Lagos, Claudia del P.
AU - Kelvin, Lee S.
AU - Conselice, Christopher
AU - Margalef-Bentabol, Berta
AU - Alpaslan, Mehmet
AU - Baldry, Ivan
AU - Bland-Hawthorn, Joss
AU - Bremer, Malcolm
AU - Brough, Sarah
AU - Cluver, Michelle
AU - Colless, Matthew
AU - Davies, Luke J. M.
AU - Häußler, Boris
AU - Holwerda, Benne W.
AU - Hopkins, Andrew M.
AU - Kafle, Prajwal R.
AU - Kennedy, Rebecca
AU - Liske, Jochen
AU - Phillipps, Steven
AU - Popescu, Cristina C.
AU - Taylor, Edward N.
AU - Tuffs, Richard
AU - van Kampen, Eelco
AU - Wright, Angus H.
N1 - RL would like to acknowledge funding from the International Centre for Radio Astronomy Research and the University of Western Australia. SB acknowledges the funding support from the Australian Research Council through a Future Fellowship (FT140101166). CL is funded by a Discovery Early Career Researcher Award
(DE150100618).
PY - 2016/10/21
Y1 - 2016/10/21
N2 - 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 Structural Investigation of Galaxies via Model
Analysis, 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 χ2. Additionally, using the median of
the final fitting values and the 16th and 84th percentile produces more
realistic error estimates than those provided by galfit, which are known to be
underestimated. We use the results of our decompositions to analyse the stellar
mass – half-light radius relations of bulges, discs and spheroids. We further
investigate the association of components with a parent disc or elliptical
relation to provide definite z = 0 disc and spheroid M⋆--Re
relations. We conclude by comparing our local disc and spheroid M⋆--Re
to simulated data from eagle and high-redshift data from Cosmic Assembly
Near-infrared Deep Extragalactic Legacy Survey-Ultra Deep Survey. We show the
potential of using the M⋆--Re relation to study galaxy
evolution in both cases but caution that for a fair comparison, all data sets
need to be processed and analysed in the same manner.
AB - 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 Structural Investigation of Galaxies via Model
Analysis, 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 χ2. Additionally, using the median of
the final fitting values and the 16th and 84th percentile produces more
realistic error estimates than those provided by galfit, which are known to be
underestimated. We use the results of our decompositions to analyse the stellar
mass – half-light radius relations of bulges, discs and spheroids. We further
investigate the association of components with a parent disc or elliptical
relation to provide definite z = 0 disc and spheroid M⋆--Re
relations. We conclude by comparing our local disc and spheroid M⋆--Re
to simulated data from eagle and high-redshift data from Cosmic Assembly
Near-infrared Deep Extragalactic Legacy Survey-Ultra Deep Survey. We show the
potential of using the M⋆--Re relation to study galaxy
evolution in both cases but caution that for a fair comparison, all data sets
need to be processed and analysed in the same manner.
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: formation
KW - Galaxies: fundamental paramaters
KW - Galaxies: spiral
KW - Galaxies: statistics
U2 - 10.1093/mnras/stw1495
DO - 10.1093/mnras/stw1495
M3 - Article
SN - 0035-8711
VL - 462
SP - 1470
EP - 1500
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -