The SAMI Galaxy Survey: rules of behaviour for spin-ellipticity radial tracks in galaxies

Author:

Rawlings Alexander12ORCID,Foster Caroline13ORCID,van de Sande Jesse13ORCID,Taranu Dan S45,Croom Scott M13ORCID,Bland-Hawthorn Joss13ORCID,Brough Sarah36ORCID,Bryant Julia J137,Colless Matthew38ORCID,Lagos Claudia del P35ORCID,Konstantopoulos Iraklis S9,Lawrence Jon S10,López-Sánchez Ángel R1011,Lorente Nuria P F10,Medling Anne M812ORCID,Oh Sree38ORCID,Owers Matt S1113,Richards Samuel N14ORCID,Scott Nicholas13ORCID,Sweet Sarah M315ORCID,Yi Sukyoung K16

Affiliation:

1. Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, NSW, 2006, Australia

2. Department of Physics, University of Helsinki, PO Box 64, FI-00014, Finland

3. ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)

4. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA

5. International Centre for Radio Astronomy Research, 7 Fairway, The University of Western Australia, Crawley, Perth, WA 6009, Australia

6. School of Physics, University of New South Wales, NSW 2052, Australia

7. Australian Astronomical Optics, AAO-USydney, School of Physics, University of Sydney, NSW 2006, Australia

8. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia

9. Atlassian 341 George St Sydney, NSW 2000, Australia

10. Australian Astronomical Optics, AAO-MQ, Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia

11. Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia

12. Ritter Astrophysical Research Center University of Toledo Toledo, OH 43606, USA

13. Astronomy, Astrophysics and Astrophotonics Research Centre, Macquarie University, Sydney, NSW 2109, Australia

14. SOFIA Science Center, USRA, NASA Ames Research Center, Building N232, M/S 232-12, PO Box 1, Moffett Field, CA 94035-0001, USA

15. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn VIC 3122, Australia

16. Department of Astronomy and Yonsei University Observatory, Yonsei University, Seoul 03722, Republic of Korea

Abstract

ABSTRACT 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.

Funder

Australian Research Council

Korean National Research Foundation

National Aeronautics and Space Administration

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Translators of Galaxy Morphology Indicators between Observation and Simulation;The Astrophysical Journal;2023-06-01

2. The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology;Monthly Notices of the Royal Astronomical Society;2022-05-03

3. The SAMI Galaxy Survey: a statistical approach to an optimal classification of stellar kinematics in galaxy surveys;Monthly Notices of the Royal Astronomical Society;2021-05-26

4. Formation of counter-rotating stars during gas-rich disc–disc mergers;Monthly Notices of the Royal Astronomical Society;2020-07-24

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