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20232026
most citedElevated UV luminosity density at Cosmic Dawn explained by non-evolving, weakly mass-dependent star formation efficiency

36 citations · 61 across the 22 of their papers we have counts for

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22 papers · 1 filter

astro-ph.GA2026

Inferring the shapes of low-mass galaxies at from FIREbox. Where are the disks?

Haojie Geng, Robert Feldmann, Jorge Moreno +2

Context. The three-dimensional shapes of galaxies provide clues to their formation and evolution. Inferring intrinsic shapes from projected sizes and axis ratios requires assumptio…

astro-ph.GA2026

Old Disks Die Hard: How Does AGN Feedback Suppress Disk Formation in Milky Way Mass Galaxies?

Patricia Fofie, James S. Bullock, Sarah Wellons +3

The connection between a galaxy's visual shape and its star formation rate is one of the oldest established trends in galaxy evolution, yet the origin of this trend remains unsettl…

astro-ph.GA2026

Investigating black hole accretion and feedback self-regulation in Seyfert galaxies using the FIRE-3 cosmological hydrodynamic simulations

Jonathan Mercedes-Feliz, Daniel Anglés-Alcázar, Jose Cevallos +12

Recent observations of local Seyfert galaxies show an intriguing connection between Active Galactic Nuclei (AGN) luminosity and a deficit of molecular gas on ~50pc scales compared…

astro-ph.GA2026

Mergers Matter: Gravothermal Collapse in Dwarf Halos with Self-Interacting Dark Matter

Maya Silverman, Abdelaziz Hussein, Arpit Arora +8

Self-Interacting Dark Matter (SIDM) models with large cross sections at relative velocities below can be tested with dwarf galaxy observations. We ana…

astro-ph.GA2026

Resolving galaxy formation in the early Universe with BonFIRE and CampFIRE

Jenna Samuel, Michael Boylan-Kolchin, Robert Feldmann +16

The abundance and rapid growth of galaxies at cosmic dawn revealed by the James Webb Space Telescope challenges models of galaxy formation, motivating new simulations to uncover th…

astro-ph.GA2026

From protogalaxy through thick and thin: Why did the Milky Way evolve in three kinematic phases?

Olti Myrtaj, James S. Bullock, Michael Boylan-Kolchin +9

APOGEE and Gaia data suggest the Milky Way's kinematic structure evolved through three distinct phases: a disordered protogalaxy, which ``spun up'' into a thick stellar disk, and t…

astro-ph.GA2026

Radial redistribution of stellar orbits in FIRE simulations of Milky-Way-mass galaxies

Matthew A. Bellardini, Fiona McCluskey, Andrew Wetzel +3

A central question in galactic dynamics and galactic archeology is: how much do the orbits of stars redistribute (migrate) after birth? We use the FIRE-2 cosmological zoom-in simul…

astro-ph.GA2026

Beyond Cloud-9: The case for discovering more HI-rich failed halos

Jorge Moreno, Coral Wheeler, Francisco J. Mercado +8

HI-rich starless halos, should they exist, hold great promise for elucidating dark matter halo structure. Yet realizing this potential demands reliable theoretical predictions for…

astro-ph.GA2025

The role of galactic winds fueling central starbursts and quasars in the FIRE cosmological simulations

Jonathan Mercedes-Feliz, Daniel Anglés-Alcázar, Boon Kiat Oh +7

Central starbursts and Active Galactic Nuclei (AGN) are thought to be fueled by either galaxy interactions or secular processes in gravitationally unstable discs. We employ cosmolo…

astro-ph.GA2025★ 1 cited

Second public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation

Andrew Wetzel, Jenna Samuel, Pratik J. Gandhi +34

We describe the second data release (DR2) of the FIRE-2 cosmological zoom-in simulations of galaxy formation, from the Feedback In Realistic Environments (FIRE) project, available…

astro-ph.GA2025

Disks no more: the morphology of low-mass simulated galaxies in FIREbox

José A. Benavides, Laura V. Sales, Andrew Wetzel +9

We study the morphology of hundreds of simulated central galaxies in the stellar mass range \msun\, from the FIREbox cosmological volume. We demons…

astro-ph.GA2025

How invisible stellar halos bias our understanding of ultra-faint galaxies

Coral Wheeler, Jorge Moreno, M. Katy Rodriguez Wimberly +6

We explore how a realistic surface brightness detection limit of mag arcsec for stars at the edges of ultra-faint galaxies affects our ability to infer th…

astro-ph.GA2025★ 2 cited

Stellar Velocity Dispersion versus Age: Consistency across Observations and Simulations, with the Milky Way as an Outlier

Fiona McCluskey, Andrew Wetzel, Sarah Loebman +1

Within disk galaxies, the velocity dispersion, , of stars increases with age, , as measured in the Milky Way (MW) and nearby galaxies. This relation provides a key window int…

astro-ph.GA2025★ 1 cited

Pickles on FIRE: The 3D Shape Evolution of Simulated Milky Way-Mass Galaxies

Luke Y. Xia, Courtney Klein, Jenny D. Wang +6

We use reduced-mass eigentensors to quantify the 3D ellipsoidal shape evolution of thirteen Milky Way-mass galaxies simulated using zoom simulations with FIRE-2 physics; all but on…

astro-ph.GA2025★ 6 cited

The Shape of FIREbox Galaxies and a Potential Tension with Low-mass Disks

Courtney Klein, Jenny D. Wang, Luke Xia +9

We study the intrinsic and observable shapes of approximately 700 star-forming galaxies with stellar masses of M from the FIREbox simulation at . We c…

astro-ph.GA2025★ 2 cited

Effects of galactic environment on size and dark matter content in low-mass galaxies

Francisco J. Mercado, Jorge Moreno, Robert Feldmann +8

We utilize the cosmological volume simulation, FIREbox, to investigate how a galaxy's environment influences its size and dark matter content. Our study focuses on approximately 1,…

astro-ph.GA2024

The Effect of Galaxy Interactions on Starbursts in Milky Way-Mass Galaxies in FIRE Simulations

Fei Li, Mubdi Rahman, Norman Murray +5

Simulations and observations suggest that galaxy interactions may enhance the star formation rate (SFR) in merging galaxies. One proposed mechanism is the torque exerted on the gas…

astro-ph.GA2024★ 8 cited

Confronting the Diversity Problem: The Limits of Galaxy Rotation Curves as a tool to Understand Dark Matter Profiles

Isabel S. Sands, Philip F. Hopkins, Xuejian Shen +9

While galaxy rotation curves provide one of the most powerful methods for measuring dark matter profiles in the inner regions of rotation-supported galaxies, at the dwarf scale the…

astro-ph.GA2024

Size-Mass Relations for Simulated Low-Mass Galaxies: Mock Imaging versus Intrinsic Properties

Courtney Klein, James S. Bullock, Jorge Moreno +4

The observationally-inferred size versus stellar-mass relationship (SMR) for low-mass galaxies provides an important test for galaxy formation models. However, the relationship rel…

astro-ph.GA2023

Dense stellar clump formation driven by strong quasar winds in the FIRE cosmological hydrodynamic simulations

Jonathan Mercedes-Feliz, Daniel Anglés-Alcázar, Boon Kiat Oh +9

We investigate the formation of dense stellar clumps in a suite of high-resolution cosmological zoom-in simulations of a massive, star forming galaxy at under the presen…

astro-ph.GA2023★ 4 cited

Effects of multi-channel AGN feedback in FIRE cosmological simulations of massive galaxies

Lindsey Byrne, Claude-André Faucher-Giguère, Sarah Wellons +6

Feedback from supermassive black holes is believed to be a critical driver of the observed color bimodality of galaxies above the Milky Way mass scale. AGN feedback has been modele…

astro-ph.GA2023★ 1 cited

Hooks & Bends in the Radial Acceleration Relation: Discriminatory Tests for Dark Matter and MOND

Francisco J. Mercado, James S. Bullock, Jorge Moreno +5

The Radial Acceleration Relation (RAR) connects the total gravitational acceleration of a galaxy at a given radius, , with that accounted for by baryons at the same…