Journal
ASTROPHYSICAL JOURNAL
Volume 763, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-637X/763/1/28
Keywords
cosmology: theory; large-scale structure of universe; methods: statistical
Categories
Funding
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2012-0004916]
- National Research Foundation of Korea [20100027910]
- STFC [ST/H002774/1]
- Royal Astronomical Society
- Durham University
- ERC
- Leverhulme trust
- ICG
- SEPNet
- University of Portsmouth
- National Research Foundation of Korea [2010-0027910] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- STFC [ST/H002774/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H002774/1] Funding Source: researchfish
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We investigate the effect of modified gravity on the specific angular momentum of galactic halos by analyzing the halo catalogs at z = 0 from high-resolution N-body simulations for a f (R) gravity model that meets the solar-system constraint. It is shown that the galactic halos in the f (R) gravity model tend to acquire significantly higher specific angular momentum than those in the standard Lambda CDM model. The largest difference in the specific angular momentum distribution between these two models occurs for the case of isolated galactic halos with mass less than 10(11) h(-1) M-circle dot, which are likely least shielded by the chameleon screening mechanism. As the specific angular momentum of galactic halos is rather insensitive to other cosmological parameters, it can in principle be an independent discriminator of modified gravity. We speculate a possibility of using the relative abundance of low surface brightness galaxies (LSBGs) as a test of general relativity given that the formation of the LSBGs occurs in fast spinning dark halos.
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