Publication:
Ghost of vector fields in compact stars

dc.contributor.coauthorSilva, Hector O.
dc.contributor.coauthorSotiriou, Thomas P.
dc.contributor.departmentDepartment of Physics
dc.contributor.kuauthorCoates, Andrew
dc.contributor.kuauthorRamazanoğlu, Fethi Mübin
dc.contributor.kuprofileResearcher
dc.contributor.kuprofileFaculty Member
dc.contributor.yokidN/A
dc.contributor.yokid254225
dc.date.accessioned2024-11-09T11:37:09Z
dc.date.issued2022
dc.description.abstractSpontaneous scalarization is a mechanism that allows a scalar field to go undetected in weak gravity environments and yet develop a nontrivial configuration in strongly gravitating systems. At the perturbative level it manifests as a tachyonic instability around spacetimes that solve Einstein's equations. The endpoint of this instability is a nontrivial scalar field configuration that can significantly modify a compact object's structure and can produce observational signatures of the scalar field's presence. Does such a mechanism exists for vector fields? Here we revisit the model that constitutes the most straightforward generalization of the original scalarization model to a vector field and perform a perturbative analysis. We show that a ghost appears as soon as the square of the naive effective mass squared becomes negative anywhere. This result poses a serious obstacle in generalizing spontaneous scalarization to vector fields.
dc.description.fulltextYES
dc.description.indexedbyWoS
dc.description.indexedbyScopus
dc.description.issue2
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuTÜBİTAK
dc.description.sponsoredbyTubitakEuEU
dc.description.sponsorshipScience & Technology Facilities Council (STFC)
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TÜBİTAK)
dc.description.sponsorshipEuropean Union (EU)
dc.description.sponsorshipHorizon 2020
dc.description.sponsorshipCO-FUNDED Brain Circulation Scheme 2
dc.description.sponsorshipScience Academy of Turkey (BAGEP)
dc.description.sponsorshipGWverse COST Action
dc.description.versionPublisher version
dc.description.volume105
dc.formatpdf
dc.identifier.doi10.1103/PhysRevD.105.024046
dc.identifier.eissn2470-0029
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR03526
dc.identifier.issn2470-0010
dc.identifier.linkhttps://doi.org/10.1103/PhysRevD.105.024046
dc.identifier.quartileN/A
dc.identifier.scopus2-s2.0-85123823527
dc.identifier.urihttps://hdl.handle.net/20.500.14288/69
dc.identifier.wos747807800002
dc.keywordsScalar-Tensor Theories
dc.keywordsSpheres
dc.languageEnglish
dc.publisherAmerican Physical Society (APS)
dc.relation.grantnoST/T000732/1
dc.relation.grantnoST/V005596/1
dc.relation.grantno117F295
dc.relation.grantno120C081
dc.relation.grantnoCA16104
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/10319
dc.sourcePhysical Review D
dc.subjectAstronomy and astrophysics
dc.subjectPhysics
dc.titleGhost of vector fields in compact stars
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.authoridN/A
local.contributor.authorid0000-0003-3075-1457
local.contributor.kuauthorCoates, Andrew
local.contributor.kuauthorRamazanoğlu, Fethi Mübin
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Physics
relation.isOrgUnitOfPublicationc43d21f0-ae67-4f18-a338-bcaedd4b72a4
relation.isOrgUnitOfPublication.latestForDiscoveryc43d21f0-ae67-4f18-a338-bcaedd4b72a4

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