The MAGPI survey
- Author(s)
- R. S. Bagge, C. Foster, A. Battisti, S. Bellstedt, M. Mun, K. Harborne, S. Barsanti, T. Mendel, S. Brough, S. M. Croom, C. D.P. Lagos, T. Mukherjee, Y. Peng, R. S. Remus, G. Santucci, P. Sharda, S. Thater, J. Van De Sande, L. M. Valenzuela, E. Wisnioski, T. Zafar, B. Ziegler
- Abstract
Galaxy gas kinematics are sensitive to the physical processes that contribute to a galaxy's evolution. It is expected that external processes will cause more significant kinematic disturbances in the outer regions, while internal processes will cause more disturbances for the inner regions. Using a subsample of 47 galaxies (<![CDATA[ $0.27<z) from the Middle Ages Galaxy Properties with Integral Field Spectroscopy (MAGPI) survey, we conduct a study into the source of kinematic disturbances by measuring the asymmetry present in the ionised gas line-of-sight velocity maps at the (inner regions) and (outer regions) elliptical annuli. By comparing the inner and outer kinematic asymmetries, we aim to better understand what physical processes are driving the asymmetries in galaxies. We find the local environment plays a role in kinematic disturbance, in agreement with other integral field spectroscopy studies of the local universe, with most asymmetric systems being in close proximity to a more massive neighbour. We do not find evidence suggesting that hosting an Active Galactic Nucleus contributes to asymmetry within the inner regions, with some caveats due to emission line modelling. In contrast to previous studies, we do not find evidence that processes leading to asymmetry also enhance star formation in MAGPI galaxies. Finally, we find a weak anti-correlation between stellar mass and asymmetry (i.e., high stellar mass galaxies are less asymmetric). We conclude by discussing possible sources driving the asymmetry in the ionised gas, such as disturbances being present in the colder gas phase (either molecular or atomic) prior to the gas being ionised, and non-axisymmetric features (e.g., a bar) being present in the galactic disk. Our results highlight the complex interplay between ionised gas kinematic disturbances and physical processes involved in galaxy evolution.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- University of New South Wales, ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australian National University, University of Western Australia, The University of Sydney, Macquarie University, Peking University, Ludwig-Maximilians-Universität München, Leiden University
- Journal
- Publications of the Astronomical Society of Australia
- Volume
- 40
- No. of pages
- 17
- ISSN
- 1323-3580
- DOI
- https://doi.org/10.1017/pasa.2023.58
- Publication date
- 11-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103004 Astrophysics, 103003 Astronomy
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/1e2006fc-9b7d-475b-a031-29e1f8c88da9