Realistic H <scp>i</scp> scale heights of Milky Way-mass galaxies in the FIREbox cosmological volume

Gensior, Jindra; Feldmann, Robert; Mayer, Lucio; Wetzel, Andrew; Hopkins, Philip F.; Faucher-Giguère, Claude-André

doi:10.1093/mnrasl/slac138

Cited by 11 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FIRE-2 model has been validated in several studies on galaxy formation and evolution across wide ranges of stellar masses and numerical resolutions (Wetzel et al 2016;Ma et al 2018aMa et al , 2018bHopkins et al 2018). FIREbox reproduces many of the observed galaxy properties (see Feldmann et al 2023) and has been analyzed in a number of recent studies (e.g., Bernardini et al 2022;Moreno et al 2022;Rohr et al 2022;Gensior et al 2023aGensior et al , 2023bCenci et al 2023).…”

Section: Fireboxmentioning

confidence: 99%

Starburst-induced Gas–Star Kinematic Misalignment

Cenci,

Feldmann,

Gensior

et al. 2024

ApJL

Self Cite

View full text Add to dashboard Cite

A kinematic misalignment of the stellar and gas components is a phenomenon observed in a significant fraction of galaxies. However, the underlying physical mechanisms are not well understood. A commonly proposed scenario for the formation of a misaligned component requires any preexisting gas disk to be removed, via flybys or ejective feedback from an active galactic nucleus. In this Letter, we study the evolution of a Milky Way mass galaxy in the FIREbox cosmological volume that displays a thin, counterrotating gas disk with respect to its stellar component at low redshift. In contrast to scenarios involving gas ejection, we find that preexisting gas is mainly removed via the conversion into stars in a central starburst, triggered by a merging satellite galaxy. The newly accreted, counterrotating gas eventually settles into a kinematically misaligned disk. About 4% (8 out of 182) of FIREbox galaxies with stellar masses larger than 5 × 109 M ⊙ at z = 0 exhibit gas–star kinematic misalignment. In all cases, we identify central starburst-driven depletion as the main reason for the removal of the preexisting corotating gas component, with no need for feedback from, e.g., a central active black hole. However, during the starburst, the gas is funneled toward the central regions, likely enhancing black hole activity. By comparing the fraction of misaligned discs between FIREbox and other simulations and observations, we conclude that this channel might have a non-negligible role in inducing kinematic misalignment in galaxies.

show abstract

Section: Fireboxmentioning

confidence: 99%

Starburst-induced Gas–Star Kinematic Misalignment

Cenci,

Feldmann,

Gensior

et al. 2024

ApJL

Self Cite

View full text Add to dashboard Cite

show abstract

FIREbox: simulating galaxies at high dynamic range in a cosmological volume

Feldmann

Quataert

Faucher-Giguère

et al. 2023

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We introduce a suite of cosmological volume simulations to study the evolution of galaxies as part of the Feedback in Realistic Environments project. FIREbox, the principal simulation of the present suite, provides a representative sample of galaxies (∼1000 galaxies with Mstar > 108 M⊙ at z = 0) at a resolution (Δx ∼ 20 pc, mb ∼ 6 × 104 M⊙) comparable to state-of-the-art galaxy zoom-in simulations. FIREbox captures the multiphase nature of the interstellar medium in a fully cosmological setting (L = 22.1 Mpc) thanks to its exceptionally high dynamic range (≳ 106) and the inclusion of multi-channel stellar feedback. Here, we focus on validating the simulation predictions by comparing to observational data. We find that simulated galaxies with Mstar < 1010.5 − 11 M⊙ have star formation rates, gas masses, and metallicities in broad agreement with observations. These galaxy scaling relations extend to low masses (Mstar ∼ 107 M⊙) and follow a (broken) power-law relationship. Also reproduced are the evolution of the cosmic HI density and the HI column density distribution at z ∼ 0 − 5. At low z, FIREbox predicts a peak in the stellar-mass–halo-mass relation, but also a higher abundance of massive galaxies and a higher cosmic star formation rate density than observed, showing that stellar feedback alone is insufficient to reproduce the properties of massive galaxies at late times. Given its high resolution and sample size, FIREbox offers a baseline prediction of galaxy formation theory in a ΛCDM Universe while also highlighting modeling challenges to be addressed in next-generation galaxy simulations.

show abstract

Hydrodynamic simulations of the KT Eridani nova super-remnant

Healy-Kalesh,

Darnley,

Shara

et al. 2023

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

A nova super-remnant (NSR) is an immense structure associated with a nova that forms when frequent and recurrent nova eruptions sweep up surrounding interstellar material (ISM) into a high density and distant shell. The prototypical NSR, measuring over 100 pc across, was discovered in 2014 around the annually erupting nova M 31N 2008-12a. Hydrodynamical simulations demonstrated that the creation of a dynamic NSR by repeated eruptions transporting large quantities of ISM is not only feasible but that these structures should exist around all novae, whether the white dwarf (WD) is increasing or decreasing in mass. But it is only the recurrent nova (RNe) with the highest WD masses and accretion rates that should host observable NSRs. KT Eridani is, potentially, the eleventh RNe recorded in the Galaxy and is also surrounded by a recently unveiled Hα shell tens of parsecs across, consistent with a NSR. Through modelling the nova ejecta from KT Eri, we demonstrate that such an observable NSR could form in approximately 50,000 years, which fits with the proper motion history of the nova. We compute the expected Hα emission from the KT Eri NSR and predict that the structure might be accessible to wide-field X-ray facilities.

show abstract

Realistic H i scale heights of Milky Way-mass galaxies in the FIREbox cosmological volume

Cited by 11 publications

References 48 publications

Starburst-induced Gas–Star Kinematic Misalignment

Starburst-induced Gas–Star Kinematic Misalignment

FIREbox: simulating galaxies at high dynamic range in a cosmological volume

Hydrodynamic simulations of the KT Eridani nova super-remnant

Contact Info

Product

Resources

About