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http://hdl.handle.net/20.500.12386/27312| Title: | Limiting magnetic fields in the cosmic web with diffuse radio emission | Authors: | Brown, S. Vernstrom, T. CARRETTI, ETTORE Dolag, K. Gaensler, B. M. Staveley-Smith, L. BERNARDI, GIANNI Haverkorn, M. Kesteven, M. POPPI, Sergio |
Issue Date: | 2017 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 468 | Issue: | 4 | First Page: | 4246 | Abstract: | We set limits on the presence of the synchrotron cosmic web through the cross-correlation of the 2.3 GHz S-PASS survey with a model of the local cosmic web derived from constrained magnetohydrodynamic (MHD) simulations. The MHD simulation assumes cosmologically seeded magnetic fields amplified during large-scale structure formation and a population of relativistic electrons/positrons from proton-proton collisions within the intergalactic medium. We set a model-dependent 3σ upper limit on the synchrotron surface brightness of 0.16 mJy arcmin<SUP>-2</SUP> at 2.3 GHz in filaments. Extrapolating from magnetic field maps created from the simulation, we infer an upper limit (density-weighted) magnetic field of 0.03 (0.13) μG in filaments at the current epoch and a limit on the primordial magnetic field (PMF) of B<SUB>PMF</SUB> < 1.0 nG. | URI: | http://hdl.handle.net/20.500.12386/27312 | URL: | http://arxiv.org/abs/1703.07829v1 https://academic.oup.com/mnras/article/468/4/4246/3091005 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stx746 | Bibcode ADS: | 2017MNRAS.468.4246B | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Brown17.pdf | PDF editoriale | 1.93 MB | Adobe PDF | View/Open |
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