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We present a smoothed particle hydrodynamic (SPH) simulation that reproduces a galaxy that is a moderate facsimile of those observed. The primary failing point of previous simulations of disk formation, namely excessive transport of angular…

Astrophysics · Physics 2009-11-06 R. J. Thacker , H. M. P. Couchman

The galaxy size-stellar mass and central surface density-stellar mass relationships are observational constraints on galaxy formation models. However, inferring the physical size of a galaxy from observed stellar emission is non-trivial due…

Comparison of observed satellite galaxies of the Milky Way (hereafter MW) with dark matter subhaloes in cosmological $N$-body simulations of MW-mass haloes suggest that such subhaloes, if they exist, are occupied by satellites in a…

Astrophysics of Galaxies · Physics 2014-06-30 Chris Power , Graham A. Wynn , Aaron S. G. Robotham , Geraint F. Lewis , Mark I. Wilkinson

Any successful model of galaxy formation needs to explain the low rate of star formation in the small progenitors of today's galaxies. This inefficiency is necessary for reproducing the low stellar-to-virial mass fractions, suggested by…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Daniel Ceverino , Anatoly Klypin , Elizabeth Klimek , Sebastian Trujillo-Gomez , Christopher W. Churchill , Joel Primack , Avishai Dekel

The evolution of the large-scale distribution of matter is sensitive to a variety of fundamental parameters that characterise the dark matter, dark energy, and other aspects of our cosmological framework. Since the majority of the mass…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-25 Ian G. McCarthy , Joop Schaye , Simeon Bird , Amandine M. C. Le Brun

We introduce the Virgo Consortium's EAGLE project, a suite of hydrodynamical simulations that follow the formation of galaxies and black holes in representative volumes. We discuss the limitations of such simulations in light of their…

This work studies the connection between the first galaxies and their hosting dark matter halos in the early Universe when Reionization is concluding. Our numerical models (already presented in an earlier study) trace the star formation…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-23 Luz Ángela García

We use large cosmological Smoothed-Particle-Hydrodynamics simulations to study the formation and evolution of sub-millimetre galaxies (SMGs). In our previous work, we studied the statistical properties of ultra-violet selected star-forming…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Ikkoh Shimizu , Naoki Yoshida , Takashi Okamoto

We investigate high-redshift galaxy sizes using a semi-analytic model constructed for the Dark-ages Reionization And Galaxy-formation Observables from Numerical Simulation project. Our fiducial model, including strong feedback from…

We explore the self-regulation of star formation using a large suite of high resolution hydrodynamic simulations, focusing on molecule-dominated regions (galactic centers and [U]LIRGS) where feedback from star formation drives highly…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Rahul Shetty , Eve C. Ostriker

Feedback is indispensable in galaxy formation. However, lacking resolutions, cosmological simulations often use ad hoc feedback parameters. Conversely, small-box simulations, while better resolving the feedback, cannot capture gas evolution…

Astrophysics of Galaxies · Physics 2020-08-12 Miao Li , Stephanie Tonnesen

Recent hydrodynamical simulations predict that stellar feedback in intermediate mass galaxies (IMGs) can drive strong fluctuations in structure (e.g., half-light radius, $R_e$). This process operates on timescales of only a few hundred Myr…

Astrophysics of Galaxies · Physics 2018-10-24 Shannon G. Patel , Daniel D. Kelson , Nicholas Diao , Stephanie Tonnesen , Louis E. Abramson

The galaxy luminosity function and galaxy stellar mass function are fundamental statistics in the testing of galaxy formation models. Theoretical predictions based on cosmological simulations can deviate from observations, especially at the…

Cosmology and Nongalactic Astrophysics · Physics 2021-10-18 Lin Tang , Weipeng Lin , Yang Wang , N. R. Napolitano

We use a cosmological hydrodynamic simulation of a cold dark matter universe to investigate theoretically the relationship between high redshift galaxies and the Lyman=alpha forest at redshift z=3. Galaxies in the simulation are surrounded…

High-redshift star-forming galaxies often have irregular morphologies with {\it giant clumps} containing up to $10^{8-9}$ solar masses of gas and stars. The origin and evolution of giant clumps are debated both theoretically and…

Astrophysics of Galaxies · Physics 2021-06-30 Jérémy Fensch , Frédéric Bournaud

We study the chaotic-like behavior of cosmological simulations by quantifying how minute perturbations grow over time and manifest as macroscopic differences in galaxy properties. When we run pairs of 'shadow' simulations that are identical…

We use the highest-resolution FLAMINGO hydrodynamical simulation to quantify cosmic variance and large-scale coherence in the evolution of massive galaxies at high redshift. FLAMINGO combines a $(1\,\mathrm{cGpc})^3$ volume with baryonic…

Astrophysics of Galaxies · Physics 2025-11-14 Seunghwan Lim , Sandro Tacchella , Roberto Maiolino , Christopher C. Lovell , Joop Schaye

In this work, we present results for the photometric and clustering properties of galaxies that arise in a LambdaCDM hydrodynamical simulation of the local universe. The present-day distribution of matter was constructed to match the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 S. E. Nuza , K. Dolag , A. Saro

We examine the chemical properties of 5 cosmological hydrodynamical simulations of an M33-like disc galaxy which have been shown to be consistent with the morphological characteristics and bulk scaling relations expected of late-type…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 K. Pilkington , B. K. Gibson , C. B. Brook , F. Calura , G. S. Stinson , R. J. Thacker , L. Michel-Dansac , J. Bailin , H. M. P. Couchman , J. Wadsley , T. R. Quinn , A. Maccio

High-redshift ($z>2$) massive quiescent galaxies are crucial tests of early galaxy formation and evolutionary mechanisms through their cosmic number densities and stellar mass functions (SMFs). We explore a sample of 743 massive ($\rm M_*>…

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