The oldest tidally induced bar-like galaxy in the IllustrisTNG cluster
Ewa L. Lokas

TL;DR
This paper presents the first example of a tidally induced bar-like galaxy at high redshift in the IllustrisTNG simulations, showing how interactions can create long-lived bars early in galaxy evolution.
Contribution
It identifies and analyzes the earliest tidally induced bar formation at z=2.9 in a cosmological simulation, highlighting the role of interactions in bar formation.
Findings
The galaxy formed a bar due to tidal interaction with a massive progenitor.
The bar persisted from z=2.9 to the present, losing mass and turning red.
Early mergers elongated the galaxy, temporarily mimicking a bar.
Abstract
New JWST observations have revealed the presence of a significant number of high-redshift barred galaxies. The origin of these bars remains unclear, and their properties appear difficult to reconcile with the results of cosmological simulations of galaxy formation. I present an example of a tidally induced bar-like galaxy formed at z = 2.9 in the TNG100 suite of the IllustrisTNG simulations. The galaxy was identified among the sample of bar-like galaxies studied before and has the earliest bar formation time among the tidally induced subsample of those objects. Its disk transformed into a bar as a result of a close interaction with a massive progenitor of a brightest cluster galaxy (BCG). It remained on a tight orbit around the host and survived until the present, losing most of its initial mass and becoming red but preserving its prolate shape. Even before the interaction, at z = 3.5,…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
