dc.contributor.author | Pakmor, R | |
dc.contributor.author | Van De Voort, F | |
dc.contributor.author | Bieri, R | |
dc.contributor.author | Gómez, FA | |
dc.contributor.author | Grand, RJJ | |
dc.contributor.author | Guillet, T | |
dc.contributor.author | Marinacci, F | |
dc.contributor.author | Pfrommer, C | |
dc.contributor.author | Simpson, CM | |
dc.contributor.author | Springel, V | |
dc.date.accessioned | 2021-03-29T08:13:54Z | |
dc.date.issued | 2020-08-21 | |
dc.description.abstract | The circumgalactic medium (CGM) is one of the frontiers of galaxy formation and intimately connected to the galaxy via accretion of gas on to the galaxy and gaseous outflows from the galaxy. Here, we analyse the magnetic field in the CGM of the Milky Way-like galaxies simulated as part of the auriga project that constitutes a set of high-resolution cosmological magnetohydrodynamical zoom simulations. We show that before z = 1 the CGM becomes magnetized via galactic outflows that transport magnetized gas from the disc into the halo. At this time, the magnetization of the CGM closely follows its metal enrichment. We then show that at low redshift an in situ turbulent dynamo that operates on a time-scale of Gigayears further amplifies the magnetic field in the CGM and saturates before z = 0. The magnetic field strength reaches a typical value of $0.1\, \mu \mathrm{ G}$ at the virial radius at z = 0 and becomes mostly uniform within the virial radius. Its Faraday rotation signal is in excellent agreement with recent observations. For most of its evolution, the magnetic field in the CGM is an unordered small-scale field. Only strong coherent outflows at low redshift are able to order the magnetic field in parts of the CGM that are directly displaced by these outflows. | en_GB |
dc.description.sponsorship | Deutsche Forschungsgemeinschaft | en_GB |
dc.description.sponsorship | CONICYT | en_GB |
dc.description.sponsorship | Max Planck Society | en_GB |
dc.description.sponsorship | European Research Council (ERC) | en_GB |
dc.description.sponsorship | Italian MIUR | en_GB |
dc.description.sponsorship | National Science Foundation (NSF) | en_GB |
dc.identifier.citation | Vol. 498 (3), pp. 3125 - 3137 | en_GB |
dc.identifier.doi | 10.1093/mnras/staa2530 | |
dc.identifier.grantnumber | SP 709/5-1 | en_GB |
dc.identifier.grantnumber | 1181264 | en_GB |
dc.identifier.grantnumber | 787361-COBOM | en_GB |
dc.identifier.grantnumber | CRAGSMAN-646955 | en_GB |
dc.identifier.grantnumber | NSF PHY-1748958 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/125252 | |
dc.language.iso | en | en_GB |
dc.publisher | Royal Astronomical Society / Oxford University Press | en_GB |
dc.rights | © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) | en_GB |
dc.subject | MHD | en_GB |
dc.subject | methods: numerical | en_GB |
dc.subject | Galaxy: formation | en_GB |
dc.subject | alaxies: haloes | en_GB |
dc.subject | galaxies: magnetic fields | en_GB |
dc.title | Magnetizing the circumgalactic medium of disc galaxies | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-03-29T08:13:54Z | |
dc.identifier.issn | 0035-8711 | |
dc.description | This is the final version. Available from Oxford University Press via the DOI in this record | en_GB |
dc.description | Data availability: The simulations underlying this article will be shared on reasonable request to the corresponding author. | en_GB |
dc.identifier.journal | Monthly Notices of the Royal Astronomical Society | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2020-08-17 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2020-08-21 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-03-29T08:10:41Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2021-03-29T08:13:56Z | |
refterms.panel | B | en_GB |