Interacting galaxies in the IllustrisTNG simulations – II: star formation in the post-merger stage

@article{Hani2020InteractingGI,
  title={Interacting galaxies in the IllustrisTNG simulations – II: star formation in the post-merger stage},
  author={Maan H Hani and Hayman Gosain and Sara L. Ellison and David R Patton and Paul Torrey},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
Galaxy mergers are a major evolutionary transformation whose effects are borne out by a plethora of observations and numerical simulations. However, most previous simulations have used idealized, isolated, binary mergers and there has not been significant progress on studying statistical samples of galaxy mergers in large cosmological simulations. We present a sample of 27 691 post-merger (PM) galaxies (0c ≤ z ≤ 1) identified from IllustrisTNG: a cosmological, large box, magnetohydrodynamical… 
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19 Citations

Interacting galaxies in the IllustrisTNG simulations - I: Triggered star formation in a cosmological context
We use the IllustrisTNG cosmological hydrodynamical simulations to investigate how the specific star formation rates (sSFRs) of massive galaxies (M* > 1010 M⊙) depend on the distance to their…
Interacting galaxies in the IllustrisTNG simulations – III. (The rarity of) quenching in post-merger galaxies
Galaxy mergers are traditionally one of the favoured mechanisms for the transformation of spiral galaxies to spheroids and for quenching star formation. To test this paradigm in the context of modern…
The impact of magnetic fields on cosmological galaxy mergers – I. Reshaping gas and stellar discs
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In recent observational studies, star-forming galaxies have been shown to follow a relation often dubbed the fundamental metallicity relation (FMR). This relation links the stellar mass of a galaxy…
The diversity and variability of star formation histories in models of galaxy evolution
Understanding the variability of galaxy star formation histories (SFHs) across a range of timescales provides insight into the underlying physical processes that regulate star formation within…
One–Two Quench: A Double Minor Merger Scenario
Using the N-body+Smoothed particle hydrodynamics code, ChaNGa, we identify two merger-driven processes—disk disruption and supermassive black hole (SMBH) feedback—which work together to quench L *…
ZFIRE: The Beginning of the End for Massive Galaxies at z ∼ 2 and Why Environment Matters
We use ZFIRE and ZFOURGE observations with the spectral energy distribution fitting tool PROSPECTOR to reconstruct the star formation histories (SFHs) of protocluster and field galaxies at z ∼ 2 and…
Rise and fall of post-starburst galaxies in Magneticum Pathfinder
Post-starburst (PSB) galaxies belong to a short-lived transition population between star-forming (SF) and quiescent galaxies. Deciphering their heavily discussed evolutionary pathways is paramount…
Detection of Double-Nuclei Galaxies in SDSS
TLDR
A novel algorithm "Gothic" (Graph-bOosTed iterated HIll Climbing) is introduced that detects whether a given image of a galaxy has characteristic features of a DNG (ASCL entry 2707) with a maximum detection rate of 4.2% with a careful choice of the input catalog.
The breakBRD Breakdown: Using IllustrisTNG to Track the Quenching of an Observationally Motivated Sample of Centrally Star-forming Galaxies
The observed breakBRD ("break bulges in red disks") galaxies are a nearby sample of face-on disk galaxies with particularly centrally concentrated star formation: they have red disks but recent star…
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