Magnetic fields from cosmological bulk flows

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dc.contributor.authorRuiz Cembranos, José Alberto
dc.contributor.authorLópez Maroto, Antonio
dc.contributor.authorVillarrubia Rojo, Héctor
dc.date.accessioned2023-06-16T15:27:04Z
dc.date.available2023-06-16T15:27:04Z
dc.date.issued2020-09
dc.description© 2020 Oxford Univ Press. This work has been supported by the Ministerio de Economia (MINECO, Spain) project FIS2016-78859-P(AEI/FEDER,UE).
dc.description.abstractWe explore the possibility that matter bulk flows could generate the required vorticity in the electron-proton-photon plasma to source cosmic magnetic fields through the Harrison mechanism. We analyze the coupled set of perturbed Maxwell and Boltzmann equations for a plasma in which the matter and radiation components exhibit relative bulk motions at the background level. These background bulk motions induce a relative velocity between the matter and cosmic microwave background rest frames at the present time, i.e. a bulk flow, with an amplitude beta. We find that, to first order in cosmological perturbations, bulk flows with velocities compatible with current Planck limits (beta<8.5 x 10(-4) at 95% CL) could generate magnetic fields with an amplitude 10(-21) G on 10 kpc comoving scales at the time of completed galaxy formation which could be sufficient to seed a galactic dynamo mechanism.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)/AEI/FEDER
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/62914
dc.identifier.doi10.1093/mnras/staa2189
dc.identifier.issn0035-8711
dc.identifier.officialurlhttp://dx.doi.org/10.1093/mnras/staa2189
dc.identifier.relatedurlhttps://academic.oup.com/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6704
dc.issue.number3
dc.journal.titleMonthly notices of the Royal Astronomical Society
dc.language.isoeng
dc.page.final3541
dc.page.initial3537
dc.publisherOxford Univ Press
dc.relation.projectIDFIS2016-78859-P
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.keywordGeneration
dc.subject.keywordOrigin
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleMagnetic fields from cosmological bulk flows
dc.typejournal article
dc.volume.number497
dspace.entity.typePublication
relation.isAuthorOfPublicationc5a4cc87-ceba-494d-95ab-d54b9b1a35e3
relation.isAuthorOfPublicatione14691a1-d3b0-47b7-96d5-24d645534471
relation.isAuthorOfPublication.latestForDiscoveryc5a4cc87-ceba-494d-95ab-d54b9b1a35e3
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