TY - JOUR
T1 - The MAGPI survey
T2 - using kinematic asymmetries in stars and gas to dissect drivers of galaxy dynamical evolution
AU - Bagge, R. S.
AU - Foster, C.
AU - D’Eugenio, F.
AU - Battisti, A.
AU - Bellstedt, S.
AU - Derkenne, C.
AU - Vaughan, S.
AU - Mendel, T.
AU - Barsanti, S.
AU - Harborne, K. E.
AU - Croom, S. M.
AU - Bland-Hawthorn, J.
AU - Grasha, K.
AU - Lagos, C. D. P.
AU - Sweet, S. M.
AU - Mailvaganam, A.
AU - Mukherjee, T.
AU - Valenzuela, L. M.
AU - de Sande, J. van
AU - Wisnioski, E.
AU - Zafar, T.
N1 - © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2024/7/1
Y1 - 2024/7/1
N2 - We present a study of kinematic asymmetries from the integral field spectroscopic surveys MAGPI and SAMI. By comparing the asymmetries in the ionized gas and stars, we aim to disentangle the physical processes that contribute to kinematic disturbances. We normalize deviations from circular motion by S05, allowing us to study kinematic asymmetries in the stars and gas, regardless of kinematic temperature. We find a similar distribution of stellar asymmetries in galaxies where we do and do not detect ionized gas, suggesting that whatever is driving the stellar asymmetries does not always lead to gas removal. In both MAGPI and SAMI, we find an anticorrelation between stellar asymmetry and stellar mass, that is absent in the gas asymmetries. After stellar mass and mean-stellar-age matching distributions, we find that at all stellar masses, MAGPI galaxies display larger stellar asymmetry compared to SAMI galaxies. In both MAGPI and SAMI galaxies, we find that star-forming galaxies with old mean-stellar-ages typically have larger asymmetries in their gas compared to their stars, whereas galaxies with young mean-stellar-ages have larger asymmetries in their stars compared to their gas. We suggest that this results from continuous, clumpy accretion of gas.
AB - We present a study of kinematic asymmetries from the integral field spectroscopic surveys MAGPI and SAMI. By comparing the asymmetries in the ionized gas and stars, we aim to disentangle the physical processes that contribute to kinematic disturbances. We normalize deviations from circular motion by S05, allowing us to study kinematic asymmetries in the stars and gas, regardless of kinematic temperature. We find a similar distribution of stellar asymmetries in galaxies where we do and do not detect ionized gas, suggesting that whatever is driving the stellar asymmetries does not always lead to gas removal. In both MAGPI and SAMI, we find an anticorrelation between stellar asymmetry and stellar mass, that is absent in the gas asymmetries. After stellar mass and mean-stellar-age matching distributions, we find that at all stellar masses, MAGPI galaxies display larger stellar asymmetry compared to SAMI galaxies. In both MAGPI and SAMI galaxies, we find that star-forming galaxies with old mean-stellar-ages typically have larger asymmetries in their gas compared to their stars, whereas galaxies with young mean-stellar-ages have larger asymmetries in their stars compared to their gas. We suggest that this results from continuous, clumpy accretion of gas.
KW - galaxies: interactions
KW - galaxies: kinematics and dynamics
UR - http://www.scopus.com/inward/record.url?scp=85195463729&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/CE170100013
U2 - 10.1093/mnras/stae1341
DO - 10.1093/mnras/stae1341
M3 - Article
AN - SCOPUS:85195463729
SN - 0035-8711
VL - 531
SP - 3011
EP - 3022
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -