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We use cosmological zoom-in simulations of galaxy formation in a Milky Way (MW)-sized halo started from identical initial conditions to investigate the evolution of galaxy sizes, baryon fractions, morphologies and angular momenta in runs…

Astrophysics of Galaxies · Physics 2017-02-15 Oscar Agertz , Andrey V. Kravtsov

Recent spatially resolved observations of galaxies at z=0.6-3 reveal that high-redshift galaxies show complex kinematics and a broad distribution of gas-phase metallicity gradients. To understand these results, we use a suite of…

Astrophysics of Galaxies · Physics 2018-04-18 Xiangcheng Ma , Philip F. Hopkins , Robert Feldmann , Paul Torrey , Claude-Andre Faucher-Giguere , Dusan Keres

We present a theoretical framework for calculating the volume filling fraction of galactic outflows in cosmic voids by integrating analytical models for the halo mass function (HMF), the halo occupation fraction, the stellar mass-halo mass…

Astrophysics of Galaxies · Physics 2025-09-05 Yue Pan , Romain Teyssier , Ulrich P. Steinwandel , Alice Pisani

Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of parameters based on the galaxy formation model…

Astrophysics of Galaxies · Physics 2015-06-23 Joshua Suresh , Simeon Bird , Mark Vogelsberger , Shy Genel , Paul Torrey , Debora Sijacki , Volker Springel , Lars Hernquist

The observed massive end of the galaxy stellar mass function is steeper than its predicted dark matter halo counterpart in the standard $\Lambda $CDM paradigm. In this paper, we investigate the impact of active galactic nuclei (AGN)…

We examine the effects of galaxy outflows on the formation of dwarf galaxies in numerical simulations of the high-redshift Universe. Using a Smoothed Particle Hydrodynamic code, we conduct two detailed simulations of a (5.2 Mpc/h)^3…

Astrophysics · Physics 2009-10-31 Evan Scannapieco , Robert J. Thacker , Marc Davis

Near-infrared surveys have now determined the luminosity functions of galaxies at 6<z<9 to impressive precision and identified a number of candidates at even earlier times. Here we develop a simple analytic model to describe these…

Astrophysics of Galaxies · Physics 2017-09-20 Steven Furlanetto , Jordan Mirocha , Richard Mebane , Guochao Sun

Radiation feedback is typically implemented using subgrid recipes in hydrodynamical simulations of galaxies. Very little work has so far been performed using radiation-hydrodynamics (RHD), and there is no consensus on the importance of…

Astrophysics of Galaxies · Physics 2015-05-28 Joakim Rosdahl , Joop Schaye , Romain Teyssier , Oscar Agertz

We present the Dark MaGICC project, which aims to investigate the effect of Dark Energy (DE) modeling on galaxy formation via hydrodynamical cosmological simulations. Dark MaGICC includes four dynamical Dark Energy scenarios with time…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 Camilla Penzo , Andrea V. Macciò , Luciano Casarini , Greg S. Stinson , James Wadsley

We demonstrate that the feedback from stellar bulges can play an essential role in shaping the halo gas of galaxies with substantial bulge components by conducting 1-D hydrodynamical simulations. The feedback model we consider consists of…

Astrophysics · Physics 2014-11-18 Shikui Tang , Q. Daniel Wang , Yu Lu , H. J. Mo

We perform calculations of isolated disc galaxies to investigate how the properties of the ISM, the nature of molecular clouds, and the global star formation rate depend on the level of stellar feedback. We adopt a simple physical model,…

Astrophysics of Galaxies · Physics 2015-05-28 C. L. Dobbs , A. Burkert , J. E. Pringle

We measure and quantify properties of galactic outflows and diffuse gas at $z \geq 1$ in cosmological hydrodynamical simulations. Our novel sub-resolution model, MUPPI, implements supernova feedback using fully local gas properties, where…

Astrophysics of Galaxies · Physics 2015-06-23 Paramita Barai , Pierluigi Monaco , Giuseppe Murante , Antonio Ragagnin , Matteo Viel

We present the Extreme-Horizon (EH) cosmological simulation: EH models galaxy formation with stellar and AGN feedback and uses a very high resolution in the intergalactic and circumgalactic medium. The high resolution in low-density regions…

We report the stellar mass functions obtained from 20 radiation hydrodynamical simulations of star cluster formation in 500 M$_\odot$ molecular clouds with metallicities of 3, 1, 1/10 and 1/100 of the solar value, with the clouds subjected…

Astrophysics of Galaxies · Physics 2025-01-22 Matthew R. Bate

Most of the visible matter in the Universe is in a gaseous state, subject to hydrodynamic forces and galaxy formation processes that are much more complex to model than gravity. These baryonic effects can potentially bias the analyses of…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-14 Lurdes Ondaro-Mallea , Raul E. Angulo , Giovanni Aricò , Joop Schaye , Ian G. McCarthy , Matthieu Schaller

Previous simulations of the growth of cosmic structures have broadly reproduced the 'cosmic web' of galaxies that we see in the Universe, but failed to create a mixed population of elliptical and spiral galaxies due to numerical…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-19 Mark Vogelsberger , Shy Genel , Volker Springel , Paul Torrey , Debora Sijacki , Dandan Xu , Gregory F. Snyder , Simeon Bird , Dylan Nelson , Lars Hernquist

We investigate the evolution of the galaxy Star Formation Rate Function (SFRF) and Cosmic Star Formation Rate Density (CSFRD) of $z\sim 1-4 $ galaxies, using cosmological Smoothed Particle Hydrodynamic (SPH) simulations and a compilation of…

Astrophysics of Galaxies · Physics 2016-12-07 Antonios Katsianis , Edoardo Tescari , Guillermo Blanc , Mark Sargent

Stellar feedback is an essential step in the baryon cycle of galaxies, but it remains unconstrained beyond Cosmic Noon. We study the ionized gas kinematics, dynamical mass and gas-flow properties of a sample of 16 sub-$L^{\star}$…

Stellar feedback influences the star formation rate (SFR) and the interstellar medium of galaxies in ways that are difficult to quantify numerically, because feedback is an essential ingredient of realistic simulations. To overcome this, we…

We aim at addressing the questions related to galaxy mass assembly through major and minor wet merging processes in the redshift range 1<z<2. A consequent fraction of Milky Way like galaxies are thought to have undergone an unstable clumpy…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 V. Perret , F. Renaud , B. Epinat , P. Amram , F. Bournaud , T. Contini , R. Teyssier , J. -C. Lambert