Effects of simulated cosmological magnetic fields on the galaxy population
We investigate the effects of varying the intensity of the primordial magnetic seed field on the global properties of the galaxy population in ideal magnetohydrodynamic cosmological simulations performed with the moving-mesh code arepo. We vary the seed field in our calculations in a range of values...
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| Format: | Article |
| Language: | en_US |
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Oxford University Press
2017
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| Online Access: | http://hdl.handle.net/1721.1/108461 https://orcid.org/0000-0003-3816-7028 https://orcid.org/0000-0001-8593-7692 |
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| author | Marinacci, Federico Vogelsberger, Mark |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Marinacci, Federico Vogelsberger, Mark |
| author_sort | Marinacci, Federico |
| collection | MIT |
| description | We investigate the effects of varying the intensity of the primordial magnetic seed field on the global properties of the galaxy population in ideal magnetohydrodynamic cosmological simulations performed with the moving-mesh code arepo. We vary the seed field in our calculations in a range of values still compatible with the current cosmological upper limits. We show that above a critical intensity of ≃10⁻⁹ G, the additional pressure arising from the field strongly affects the evolution of gaseous structures, leading to a suppression of the cosmic star formation history, which is stronger for larger seed fields. This directly reflects into a lower total galaxy count above a fixed stellar mass threshold at all redshifts, and a lower galaxy number density at fixed stellar mass and a less massive stellar component at fixed virial mass at all mass scales. These signatures may be used, in addition to the existing methods, to derive tighter constraints on primordial magnetic seed field intensities. |
| first_indexed | 2024-09-23T10:15:11Z |
| format | Article |
| id | mit-1721.1/108461 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:15:11Z |
| publishDate | 2017 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | mit-1721.1/1084612022-09-30T19:57:47Z Effects of simulated cosmological magnetic fields on the galaxy population Marinacci, Federico Vogelsberger, Mark Massachusetts Institute of Technology. Department of Physics Marinacci, Federico Vogelsberger, Mark We investigate the effects of varying the intensity of the primordial magnetic seed field on the global properties of the galaxy population in ideal magnetohydrodynamic cosmological simulations performed with the moving-mesh code arepo. We vary the seed field in our calculations in a range of values still compatible with the current cosmological upper limits. We show that above a critical intensity of ≃10⁻⁹ G, the additional pressure arising from the field strongly affects the evolution of gaseous structures, leading to a suppression of the cosmic star formation history, which is stronger for larger seed fields. This directly reflects into a lower total galaxy count above a fixed stellar mass threshold at all redshifts, and a lower galaxy number density at fixed stellar mass and a less massive stellar component at fixed virial mass at all mass scales. These signatures may be used, in addition to the existing methods, to derive tighter constraints on primordial magnetic seed field intensities. 2017-04-27T18:22:03Z 2017-04-27T18:22:03Z 2015-11 2015-10 Article http://purl.org/eprint/type/JournalArticle 1745-3925 1745-3933 http://hdl.handle.net/1721.1/108461 Marinacci, Federico and Vogelsberger, Mark. “Effects of Simulated Cosmological Magnetic Fields on the Galaxy Population.” Monthly Notices of the Royal Astronomical Society: Letters 456, no. 1 (November 28, 2015): L69–L73. https://orcid.org/0000-0003-3816-7028 https://orcid.org/0000-0001-8593-7692 en_US http://dx.doi.org/10.1093/mnrasl/slv176 Monthly Notices of the Royal Astronomical Society Letters Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press arXiv |
| spellingShingle | Marinacci, Federico Vogelsberger, Mark Effects of simulated cosmological magnetic fields on the galaxy population |
| title | Effects of simulated cosmological magnetic fields on the galaxy population |
| title_full | Effects of simulated cosmological magnetic fields on the galaxy population |
| title_fullStr | Effects of simulated cosmological magnetic fields on the galaxy population |
| title_full_unstemmed | Effects of simulated cosmological magnetic fields on the galaxy population |
| title_short | Effects of simulated cosmological magnetic fields on the galaxy population |
| title_sort | effects of simulated cosmological magnetic fields on the galaxy population |
| url | http://hdl.handle.net/1721.1/108461 https://orcid.org/0000-0003-3816-7028 https://orcid.org/0000-0001-8593-7692 |
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