# Exploring simulated early star formation in the context of the ultrafaint dwarf galaxies

@article{Corlies2018ExploringSE,
title={Exploring simulated early star formation in the context of the ultrafaint dwarf galaxies},
author={Lauren Corlies and Kathryn V. Johnston and John H. Wise},
journal={Monthly Notices of the Royal Astronomical Society},
year={2018},
volume={475},
pages={4868-4880}
}
• Published 25 January 2018
• Physics
• Monthly Notices of the Royal Astronomical Society
Ultrafaint dwarf galaxies (UFDs) are typically assumed to have simple, stellar populations with star formation ending at reionization. Yet as the observations of these galaxies continue to improve, their star formation histories (SFHs) are revealed to be more complicated than previously thought. In this paper, we study how star formation, chemical enrichment, and mixing proceed in small, dark matter halos at early times using a high-resolution, cosmological, hydrodynamical simulation. The goals…
12 Citations

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## References

SHOWING 1-10 OF 68 REFERENCES

### Connecting the First Galaxies with Ultrafaint Dwarfs in the Local Group: Chemical Signatures of Population III Stars

• Physics
• 2017
We investigate the star formation history (SFH) and chemical evolution of isolated analogs of Local Group (LG) ultrafaint dwarf galaxies (UFDs; stellar mass range of ) and gas-rich, low-mass dwarfs

### The effect of feedback and reionization on star formation in low-mass dwarf galaxy haloes

• Physics
• 2013
We simulate the evolution of a 10^9 Msun dark matter halo in a cosmological setting with an adaptive-mesh refinement code as an analogue to local low luminosity dwarf irregular and dwarf spheroidal

### Metal Enrichment of the Intergalactic Medium in Cosmological Simulations

• Physics
• 2001
Observations have established that the diffuse intergalactic medium (IGM) at z ~ 3 is enriched to ~10-2.5 solar metallicity and that the hot gas in large clusters of galaxies (ICM) is enriched to -

### Scaling Relations for Galaxies Prior to Reionization

• Physics
• 2014
The first galaxies in the universe are the building blocks of all observed galaxies. We present scaling relations for galaxies forming at redshifts z ⩾ 15 when reionization is just beginning. We

### Star-Formation Histories, Abundances, and Kinematics of Dwarf Galaxies in the Local Group

• Physics
• 2009
Within the Local Universe galaxies can be studied in great detail star by star, and here we review the results of quantitative studies in nearby dwarf galaxies. The color-magnitude diagram synthesis

### Resolving the Formation of Protogalaxies. III. Feedback from the First Stars

• Physics
• 2007
The first stars form in dark matter halos of masses ~106 M☉ as suggested by an increasing number of numerical simulations. Radiation feedback from these stars expels most of the gas from the shallow

### CHEMICAL SIGNATURES OF THE FIRST GALAXIES: CRITERIA FOR ONE-SHOT ENRICHMENT

• Physics
• 2010
We utilize metal-poor stars in the local, ultra-faint dwarf galaxies (UFDs; Ltot ⩽ 105 L☉) to empirically constrain the formation process of the first galaxies. Since UFDs have much simpler star

### Formation of isolated dwarf galaxies with feedback

• Physics
• 2010
We present results of high resolution hydrodynamical simulations of the formation and evolution of dwarf galaxies. Our simulations start from cosmological initial conditions at high redshift. They

### TRACING THE EVOLUTION OF HIGH-REDSHIFT GALAXIES USING STELLAR ABUNDANCES

• Physics
• 2013
This paper presents the first results from a model for chemical evolution that can be applied to N-body cosmological simulations and quantitatively compared to measured stellar abundances from large

### The effects of photoionization on galaxy formation - II. Satellite galaxies in the Local Group

• Physics
• 2001
We use a self-consistent model of galaxy formation and the evolution of the intergalactic medium to study the effects of the reionization of the Universe at high redshift on the properties of