TY - JOUR
T1 - The SAMI galaxy survey
T2 - Rules of behaviour for spin-ellipticity radial tracks in galaxies
AU - Rawlings, Alexander
AU - Foster, Caroline
AU - van de Sande, Jesse
AU - Taranu, Dan S.
AU - Croom, Scott M.
AU - Bland-Hawthorn, Joss
AU - Brough, Sarah
AU - Bryant, Julia J.
AU - Colless, Matthew
AU - Del Lagos, Claudia P.
AU - Konstantopoulos, Iraklis S.
AU - Lawrence, Jon S.
AU - López-Sánchez, Ángel R.
AU - Lorente, Nuria P.F.
AU - Medling, Anne M.
AU - Oh, Sree
AU - Owers, Matt S.
AU - Richards, Samuel N.
AU - Scott, Nicholas
AU - Sweet, Sarah M.
AU - Yi, Sukyoung K.
N1 - Publisher Copyright:
© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
PY - 2020/1/1
Y1 - 2020/1/1
N2 - We study the behaviour of the spin-ellipticity radial tracks for 507 galaxies from the Sydney AAO Multiobject Integral Field (SAMI) Galaxy Survey with stellar kinematics out to ≥1.5Re. We advocate for a morpho-dynamical classification of galaxies, relying on spatially resolved photometric and kinematic data. We find the use of spin-ellipticity radial tracks is valuable in identifying substructures within a galaxy, including embedded and counter-rotating discs, that are easily missed in unilateral studies of the photometry alone. Conversely, bars are rarely apparent in the stellar kinematics but are readily identified on images. Consequently, we distinguish the spin-ellipticity radial tracks of seven morpho-dynamical types: elliptical, lenticular, early spiral, late spiral, barred spiral, embedded disc, and 2σ galaxies. The importance of probing beyond the inner radii of galaxies is highlighted by the characteristics of galactic features in the spin-ellipticity radial tracks present at larger radii. The density of information presented through spin-ellipticity radial tracks emphasizes a clear advantage to representing galaxies as a track, rather than a single point, in spin-ellipticity parameter space.
AB - We study the behaviour of the spin-ellipticity radial tracks for 507 galaxies from the Sydney AAO Multiobject Integral Field (SAMI) Galaxy Survey with stellar kinematics out to ≥1.5Re. We advocate for a morpho-dynamical classification of galaxies, relying on spatially resolved photometric and kinematic data. We find the use of spin-ellipticity radial tracks is valuable in identifying substructures within a galaxy, including embedded and counter-rotating discs, that are easily missed in unilateral studies of the photometry alone. Conversely, bars are rarely apparent in the stellar kinematics but are readily identified on images. Consequently, we distinguish the spin-ellipticity radial tracks of seven morpho-dynamical types: elliptical, lenticular, early spiral, late spiral, barred spiral, embedded disc, and 2σ galaxies. The importance of probing beyond the inner radii of galaxies is highlighted by the characteristics of galactic features in the spin-ellipticity radial tracks present at larger radii. The density of information presented through spin-ellipticity radial tracks emphasizes a clear advantage to representing galaxies as a track, rather than a single point, in spin-ellipticity parameter space.
KW - Galaxies: kinematics and dynamics
KW - Galaxies: photometry
KW - Galaxies: structure
UR - http://www.scopus.com/inward/record.url?scp=85079693316&partnerID=8YFLogxK
U2 - 10.1093/mnras/stz2797
DO - 10.1093/mnras/stz2797
M3 - Review article
SN - 0035-8711
VL - 491
SP - 324
EP - 343
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -