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Dynamical modelling of ATLAS3D galaxies

Published online by Cambridge University Press:  30 October 2025

S. Thater Open the ORCID record for S. Thater [Opens in a new window] ,
P. Jethwa ,
E. J. Lilley ,
A. Zocchi Open the ORCID record for A. Zocchi [Opens in a new window] ,
G. Santucci  and
G. van de Ven
S. Thater*
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna
P. Jethwa
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna
E. J. Lilley
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna
A. Zocchi
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna
G. Santucci
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), M468, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia
G. van de Ven
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna
*
email: sabine.thater@univie.ac.at
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Abstract

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Triaxial dynamical models of massive galaxies observed in the ATLAS3D project can provide new insights into the complex evolutionary processes that shape galaxies. The ATLAS3D survey is ideal as the sample comprises a good mix of fast and slow rotators with vastly different mass assembly histories. We present a detailed dynamical study with our triaxial modelling code DYNAMITE, which models galaxies as a superposition of their stellar orbits. The models allow us to constrain the intrinsic shape of the stellar component, the distributions of the visible and invisible matter and the orbit distribution in these nearby early-type galaxies and to relate it with different evolutionary scenarios. Triaxial modelling is essential for these galaxies to understand their complex kinematical features.

Keywords

Galaxies: kinematics and dynamicsGalaxies: structure

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S379: Dynamical Masses of Local Group Galaxies , December 2023 , pp. 314 - 318
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

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