Aaron A. Dutton
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View article: NIHAO – XXV. Convergence in the cusp-core transformation of cold dark matter haloes at high star formation thresholds
NIHAO – XXV. Convergence in the cusp-core transformation of cold dark matter haloes at high star formation thresholds Open
We use cosmological hydrodynamical galaxy formation simulations from the NIHAO project to investigate the response of cold dark matter (CDM) haloes to baryonic processes. Previous work has shown that the halo response is primarily a functi…
View article: The Dekel-Zhao profile: a mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
The Dekel-Zhao profile: a mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties Open
We explore a function with two shape parameters for the dark-matter halo density profile subject to baryonic effects, which is a special case of the general Zhao family of models applied to simulated dark-matter haloes by Dekel et al. This…
View article: NIHAO XXVI: Nature versus nurture, the Star Formation Main Sequence and the origin of its scatter
NIHAO XXVI: Nature versus nurture, the Star Formation Main Sequence and the origin of its scatter Open
We investigate how the NIHAO galaxies match the observed star formation main sequence (SFMS) and what the origin of its scatter is. The NIHAO galaxies reproduce the SFMS and generally agree with observations, but the slope is about unity a…
View article: Abundance matching tested on small scales with galaxy dynamics
Abundance matching tested on small scales with galaxy dynamics Open
We present a comprehensive test of the relation between stellar and total masses in galaxies as predicted by popular models based on abundance matching (AM) techniques. We use the ‘Spectroscopy and H-band Imaging of Virgo cluster galaxies’…
View article: A model for core formation in dark matter haloes and ultra-diffuse galaxies by outflow episodes
A model for core formation in dark matter haloes and ultra-diffuse galaxies by outflow episodes Open
We present a simple model for the response of a dissipationless spherical system to an instantaneous mass change at its centre, describing the formation of flat cores in dark matter haloes and ultra-diffuse galaxies (UDGs) from feedback-dr…
View article: NIHAO-UHD: The properties of MW-like stellar disks in high resolution cosmological simulations
NIHAO-UHD: The properties of MW-like stellar disks in high resolution cosmological simulations Open
Simulating thin and extended galactic disks has long been a challenge in computational astrophysics. We introduce the NIHAO-UHD suite of cosmological hydrodynamical simulations of Milky Way mass galaxies and study stellar disk properties s…
View article: Quantifying inhomogeneities in the HI distributions of simulated galaxies
Quantifying inhomogeneities in the HI distributions of simulated galaxies Open
The NIHAO cosmological simulations form a collection of a hundred high-resolution galaxies. We used these simulations to test the impact of stellar feedback on the morphology of the HI distribution in galaxies. We ran a subsample of twenty…
View article: Local photoionization feedback effects on galaxies
Local photoionization feedback effects on galaxies Open
We implement an optically thin approximation for the effects of the local radiation field from stars and hot gas on the gas heating and cooling in the N-body smoothed particle hydrodynamics code gasoline2. We resimulate three galaxies from…
View article: SDSS-IV MaNGA: the inner density slopes of nearby galaxies
SDSS-IV MaNGA: the inner density slopes of nearby galaxies Open
We derive the mass-weighted total density slopes within the effective (half-light) radius, γ′, for more than 2000 nearby galaxies from the SDSS-IV (Sloan Digital Sky Survey IV) MaNGA survey using Jeans-anisotropic-models applied to integra…
View article: Is the dark-matter halo spin a predictor of galaxy spin and size?
Is the dark-matter halo spin a predictor of galaxy spin and size? Open
The similarity between the distributions of spins for galaxies (λgal) and for dark-matter haloes (λhalo), indicated both by simulations and observations, is naively interpreted as a one-to-one correlation between the spins of a galaxy and …
View article: Deep ugrizY imaging and DEEP2/3 spectroscopy: a photometric redshift testbed for LSST and public release of data from the DEEP3 Galaxy Redshift Survey
Deep ugrizY imaging and DEEP2/3 spectroscopy: a photometric redshift testbed for LSST and public release of data from the DEEP3 Galaxy Redshift Survey Open
We present catalogues of calibrated photometry and spectroscopic redshifts in the Extended Groth Strip, intended for studies of photometric redshifts (photo-z’s). The data includes ugriz photometry from Canada–France–Hawaii Telescope Legac…
View article: Clues to the nature of dark matter from first galaxies
Clues to the nature of dark matter from first galaxies Open
We use 38 high-resolution simulations of galaxy formation between redshift 10 and 5 to study the impact of a 3 keV warm dark matter (WDM) candidate on the high-redshift Universe. We focus our attention on the stellar mass function and the …
View article: NIHAO – XXII. Introducing black hole formation, accretion, and feedback into the NIHAO simulation suite
NIHAO – XXII. Introducing black hole formation, accretion, and feedback into the NIHAO simulation suite Open
We introduce algorithms for black hole physics, i.e. black hole formation, accretion, and feedback, into the Numerical Investigation of a Hundred Astrophysical Objects (NIHAO) project of galaxy simulations. This enables us to study high ma…
View article: Formation of ultra-diffuse galaxies in the field and in galaxy groups
Formation of ultra-diffuse galaxies in the field and in galaxy groups Open
We study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from dwarfs in a characteristic mass range by multiple episodes o…
View article: NIHAO XVI: the properties and evolution of kinematically selected discs, bulges, and stellar haloes
NIHAO XVI: the properties and evolution of kinematically selected discs, bulges, and stellar haloes Open
We use 25 simulated galaxies from the NIHAO project to define and characterize a variety of kinematic stellar structures: Thin and thick discs, large-scale single discs, classical and pseudobulges, spheroids, inner discs, and stellar haloe…
View article: Erratum: NIHAO IV: core creation and destruction in dark matter density profiles across cosmic time
Erratum: NIHAO IV: core creation and destruction in dark matter density profiles across cosmic time Open
International audience
View article: NIHAO XXI: the emergence of low surface brightness galaxies
NIHAO XXI: the emergence of low surface brightness galaxies Open
The existence of galaxies with a surface brightness $\\mu$ lower than the\nnight sky has been known since three decades. Yet, their formation mechanism\nand emergence within a $\\rm\\Lambda CDM$ universe has remained largely\nundetermined.…
View article: An observational test for star formation prescriptions in cosmological hydrodynamical simulations
An observational test for star formation prescriptions in cosmological hydrodynamical simulations Open
State-of-the-art cosmological hydrodynamical simulations of galaxy formation have reached the point at which their outcomes result in galaxies with ever more realism. Still, the employed sub-grid models include several free parameters such…
View article: NIHAO XX: the impact of the star formation threshold on the cusp–core transformation of cold dark matter haloes
NIHAO XX: the impact of the star formation threshold on the cusp–core transformation of cold dark matter haloes Open
We use cosmological hydrodynamical galaxy formation simulations from the\nNIHAO project to investigate the impact of the threshold for star formation on\nthe response of the dark matter (DM) halo to baryonic processes. The fiducial\nNIHAO …
View article: Stars behind Bars II: A Cosmological Formation Scenario for the Milky Way’s Central Stellar Structure
Stars behind Bars II: A Cosmological Formation Scenario for the Milky Way’s Central Stellar Structure Open
The stellar populations in the inner kiloparsecs of the Milky Way (MW) show complex kinematical and chemical structures. The origin and evolution of these structures are still under debate. Here we study the central region of a fully cosmo…
View article: NIHAO – XVIII. Origin of the MOND phenomenology of galactic rotation curves in a ΛCDM universe
NIHAO – XVIII. Origin of the MOND phenomenology of galactic rotation curves in a ΛCDM universe Open
The phenomenological basis for Modified Newtonian Dynamics (MOND) is the\nradial-acceleration-relation (RAR) between the observed acceleration,\n$a=V^2_{rot}(r)/r$, and the acceleration accounted for by the observed baryons\n(stars and col…
View article: NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle
NIHAO XIX: how supernova feedback shapes the galaxy baryon cycle Open
International audience
View article: The edge of galaxy formation III: the effects of warm dark matter on Milky Way satellites and field dwarfs
The edge of galaxy formation III: the effects of warm dark matter on Milky Way satellites and field dwarfs Open
In this third paper of the series, we investigate the effects of warm dark\nmatter with a particle mass of $m_\\mathrm{WDM}=3\\,\\mathrm{keV}$ on the smallest\ngalaxies in our Universe. We present a sample of 21 hydrodynamical cosmological…
View article: CGM properties in VELA and NIHAO simulations; the OVI ionization mechanism: dependence on redshift, halo mass, and radius
CGM properties in VELA and NIHAO simulations; the OVI ionization mechanism: dependence on redshift, halo mass, and radius Open
In this work, we study the components of cool and warm/hot gas in the circumgalactic medium (CGM) of simulated galaxies and address the relative production of OVI by photoionization versus collisional ionization, as a function of halo mass…
View article: Dynamic Equilibrium Sets of the Atomic Content of Galaxies across Cosmic Time
Dynamic Equilibrium Sets of the Atomic Content of Galaxies across Cosmic Time Open
We analyze 88 independent, high-resolution, cosmological zoomed-in simulations of disk galaxies in the NIHAO simulations suite to explore the connection between the atomic gas fraction and angular momentum (AM) of baryons throughout cosmic…
View article: A deeper look into the structure of ΛCDM haloes: correlations between halo parameters from Einasto fits
A deeper look into the structure of ΛCDM haloes: correlations between halo parameters from Einasto fits Open
We used high resolution dark matter only cosmological simulations to investigate the structural properties of Lambda Cold Dark Matter ($\Lambda$CDM) haloes over cosmic time. The haloes in our study range in mass from $\sim 10^{10}$ to $\si…
View article: Quantifying inhomogeneities in the HI distributions of simulated galaxies
Quantifying inhomogeneities in the HI distributions of simulated galaxies Open
The NIHAO cosmological simulations form a collection of a hundred high-resolution galaxies. We used these simulations to test the impact of stellar feedback on the morphology of the HI distribution in galaxies. We ran a subsample of twenty…
View article: NIHAO XVII: The diversity of dwarf galaxy kinematics and implications for the <scp>Hi</scp> velocity function
NIHAO XVII: The diversity of dwarf galaxy kinematics and implications for the <span>Hi</span> velocity function Open
We use 85 pairs of high resolution LCDM cosmological simulations from the\nNIHAO project to investigate why in dwarf galaxies neutral hydrogen (HI)\nlinewidths measured at 50% of the peak flux W_50 /2 (from the hydrodynamical\nsimulations)…
View article: Angular momentum evolution of bulge stars in disc galaxies in NIHAO
Angular momentum evolution of bulge stars in disc galaxies in NIHAO Open
We study the origin of bulge stars and their angular momentum (AM) evolution in 10 spiral galaxies with baryonic masses above 1010 M in the Numerical Investigation of a Hundred Astrophysical Objects galaxy formation simulations. The simula…
View article: NIHAO XV: the environmental impact of the host galaxy on galactic satellite and field dwarf galaxies
NIHAO XV: the environmental impact of the host galaxy on galactic satellite and field dwarf galaxies Open
We study the impact of the host on dwarf galaxy properties using four new\nMilky Way-like, ultra high-resolution simulations, ($N_{\\rm part} >10^7$) from\nthe NIHAO project. We split our sample in satellite ($R2.5 R_{\\rm 200}$) galaxies.…