The impact of galactic feedback on the circumgalactic medium

  title={The impact of galactic feedback on the circumgalactic medium},
  author={Joshua Suresh and Simeon Bird and Mark Vogelsberger and Shy Genel and Paul Torrey and Debora Sijacki and Volker Springel and Lars E. Hernquist},
  journal={Monthly Notices of the Royal Astronomical Society},
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 developed in Vogelsberger et al. We examine the effects of AGN feedback, wind mass loading, wind specific energy, and wind metal-loading on the properties of the circumgalactic medium (CGM) of galaxies with M_(halo) > 10^(11) M⊙. Note that while the V13 model… 
Properties of the circumgalactic medium in simulations compared to observations
Context. Galaxies are surrounded by extended gaseous halos that store significant fractions of chemical elements. These are syntethized by the stellar populations and later ejected into the
Role of cosmic rays in the circumgalactic medium
We explore the impact of cosmic rays (CRs) on cosmological adaptive-mesh refinement simulations of a forming 10^12 Msolar halo, focusing on the circumgalactic medium (CGM), and its resulting
The Role of Cosmic-ray Transport in Shaping the Simulated Circumgalactic Medium
The majority of galactic baryons resides outside of the galactic disk in the diffuse gas known as the circumgalactic medium (CGM). While state-of-the art simulations excel at reproducing galactic
The diversity of the circumgalactic medium around z = 0 Milky Way-mass galaxies from the Auriga simulations
Galaxies are surrounded by massive gas reservoirs (i.e. the circumgalactic medium; CGM) which play a key role in their evolution. The properties of the CGM, which are dependent on a variety of
How Do Supernovae Impact the Circumgalactic Medium? I. Large-scale Fountains around a Milky Way–like Galaxy
Feedback is indispensable in galaxy formation. However, lacking resolutions, cosmological simulations often use ad hoc feedback parameters. Conversely, small-box simulations, while they better
Cool circumgalactic gas of passive galaxies from cosmological inflow
The circumgalactic medium (CGM) of galaxies consists of a multi-phase gas with components at very different temperatures, from 104 K to 107 K. One of the greatest puzzles about this medium is the
The circumgalactic medium (CGM) is one of the remaining least constrained components of galaxies and as such has significant potential for advancing galaxy formation theories. In this work, we vary
Probing the gaseous halo of galaxies through non-thermal emission from AGN-driven outflows
Feedback from outflows driven by active galactic nuclei (AGN) can affect the distribution and properties of the gaseous halos of galaxies. We study the hydrodynamics and non-thermal emission from the
Galaxy mergers moulding the circum-galactic medium – I. The impact of a major merger
Galaxies are surrounded by sizeable gas reservoirs which host a significant amount of metals: the circum-galactic medium (CGM). The CGM acts as a mediator between the galaxy and the extra-galactic
The Effect of AGN Heating on the Low-redshift Lyα Forest
We investigate the effects of AGN heating and the ultraviolet background on the low-redshift Lyα forest column density distribution (CDD) using the Illustris simulation. We show that Illustris


Galactic winds in cosmological simulations of the circumgalactic medium
We explore new observationally-constrained sub-resolution models of galactic outflows and investigate their impact on the circumgalactic medium (CGM) in the redshift range z = 2 4. We perform
We present new results on the kinematics, thermal and ionization state, and spatial distribution of metal-enriched gas in the circumgalactic medium (CGM) of massive galaxies at redshift ∼3, using the
Stellar Feedback in Galaxies and the Origin of Galaxy-scale Winds
Feedback from massive stars is believed to play a critical role in driving galactic superwinds that enrich the intergalactic medium and shape the galaxy mass function, massmetallicity relation, and
Cosmological simulations of intergalactic medium enrichment from galactic outflows
We investigate models of self-consistent chemical enrichment of the intergalactic medium (IGM) from z = 6.0 → 1.5, based on hydrodynamic simulations of structure formation that explicitly incorporate
Constraints on hydrodynamical subgrid models from quasar absorption line studies of the simulated circumgalactic medium
Cosmological hydrodynamical simulations of galaxy evolution are increasingly able to produce realistic galaxies, but the largest hurdle remaining is in constructing subgrid models that accurately
A model for cosmological simulations of galaxy formation physics: multi-epoch validation
We present a multi-epoch analysis of the galaxy populations formed within the cosmological hydrodynamical simulations presented in Vogelsberger et al. (2013). These simulations explore the
Neutral hydrogen in galaxy haloes at the peak of the cosmic star formation history
We use high-resolution cosmological zoom-in simulations from the FIRE (Feedback in Realistic Environments) project to make predictions for the covering fractions of neutral hydrogen around galaxies
The neutral hydrogen content of galaxies in cosmological hydrodynamic simulations
We examine the global Hi properties of galaxies in quarter-billion particle cosmological simulations using Gadget-2, focusing on how galactic outflows impact Hi content. We consider four outflow
Diffuse gas properties and stellar metallicities in cosmological simulations of disc galaxy formation
We analyse the properties of the circum-galactic medium and the relation between its metal content and that of the stars comprising the central galaxy in eight hydrodynamical ‘zoom-in’ simulations of
Hydrogen and Metal Line Absorption Around Low-Redshift Galaxies in Cosmological Hydrodynamic Simulations
We study the physical conditions of the circum-galactic medium (CGM) around z = 0.25 galaxies as traced by Hi and metal line absorption, using cosmological hydrodynamic simulations that include