Large-scale magnetic fields: galaxy two-point correlation function |
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| Authors: | Shiv K Sethi |
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| Institution: | Raman Research Institute, Bangalore 560080, India |
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| Abstract: | We study the effect of large-scale tangled magnetic fields on the galaxy two-point correlation function in the redshift space. We show that (i) the magnetic field effects can be comparable to the gravity-induced clustering for present magnetic field strength B 0? 5 × 10?8 G , (ii) the absence of this signal from the present data gives an upper bound B 0? 3 × 10?8 G and (iii) the future data can probe the magnetic fields of ?10?8 G . A comparison with other constraints on the present magnetic field shows that they are marginally compatible. However, if the magnetic fields corresponding to B 0? 10?8 G existed at the last scattering surface, they will cause unacceptably large cosmic microwave background radiation anisotropies. |
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| Keywords: | magnetic fields MHD cosmology: theory large-scale structure of Universe |
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