Journal article

Dark-ages reionization and galaxy-formation simulation - VII. The sizes of high-redshift galaxies

Chuanwu Liu, Simon J Mutch, Gregory B Poole, PW Angel, Alan R Duffy, Paul M Geil, Andrei Mesinger, J Stuart B Wyithe

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2017

Abstract

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 supernovae and photoionization background, accurately reproduces the evolution of the stellar mass function and ultraviolet (UV) luminosity function. Using this model, we study the size–luminosity relation of galaxies and find that the effective radius scales with UV luminosity as Re ∝ L0.25 at z ∼ 5–9. We show that recently discovered very luminous galaxies at z ∼ 7 and 11 lie on our predicted size–luminosity relations. We find that a significant fraction of gala..

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Grants

Awarded by Victorian Life Sciences Computation Initiative (VLSCI)


Awarded by Australian Research Council through the ARC Laureate Fellowship


Awarded by European Research Council (ERC) under the European Union's Horizon research and innovation programme


Funding Acknowledgements

This research was supported by the Victorian Life Sciences Computation Initiative (VLSCI), grant ref. UOM0005, on its Peak Computing Facility hosted at the University of Melbourne, an initiative of the Victorian Government, Australia. Part of this work was performed on the gSTAR national facility at Swinburne University of Technology. gSTAR is funded by Swinburne and the Australian Governments Education Investment Fund. This research programme is funded by the Australian Research Council through the ARC Laureate Fellowship FL110100072 awarded to JSBW. AM acknowledges support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 638809 AIDA).