Realistic simulations of galaxy formation in f(R) modified gravity
Realistic simulations of galaxy formation in f(R) modified gravity
复制标题
f(R) 修正重力下星系形成的真实模拟
DOI:
10.1038/s41550-019-0823-y
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发表时间:
2019
期刊:
影响因子:
14.1
通讯作者:
Arnold C
中科院分区:
文献类型:
--
作者:
Arnold C
Future astronomical surveys will gather information that will allow gravity to be tested on cosmological scales, where general relativity is currently poorly constrained. We present a set of cosmological hydrodynamical simulations that follow galaxy formation inf(R) modified gravity models and are dedicated to finding observational signatures to help distinguish general relativity from alternatives using this information. The simulations employ the IllustrisTNG model and a new modified gravity solver in AREPO, allowing the interplay of baryonic feedback and modified gravity to be studied in the same simulation, and the degeneracy between them in the matter power spectrum to be resolved. We find that the neutral hydrogen power spectrum is suppressed substantially inf(R) gravity, which allows this model to be constrained using upcoming data from the Square Kilometre Array. Disk galaxies can form in ourf(R) gravity simulations, even in the partially screened regime, and their galaxy stellar properties are only mildly affected. We conclude that modified gravity allows the formation of realistic galaxies and leaves observable signatures on large scales.
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DOI:
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发表时间:
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期刊:
影响因子:
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影响因子:
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DOI:
--
发表时间:
2015
期刊:
影响因子:
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