Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/36730
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dc.contributor.authorSengo, Ivopt_PT
dc.contributor.authorCunha, Pedro V.P.pt_PT
dc.contributor.authorHerdeiro, Carlos A.R.pt_PT
dc.contributor.authorRadu, Eugenpt_PT
dc.date.accessioned2023-03-30T07:55:24Z-
dc.date.available2023-03-30T07:55:24Z-
dc.date.issued2023-
dc.identifier.urihttp://hdl.handle.net/10773/36730-
dc.description.abstractWe investigate the gravitational lensing by spinning Proca stars and the shadows and lensing by Kerr black holes (BHs) with synchronised Proca hair, discussing both theoretical aspects and observational constraints from the Event Horizon Telescope (EHT) M87* and Sgr A* data. On the theoretical side, this family of BHs interpolates between Kerr-like solutions — exhibiting a similar optical appearance to that of Kerr BHs — to very non-Kerr like solutions, exhibiting exotic features such as cuspy shadows, egg-like shadows and ghost shadows. We interpret these features in terms of the structure of the fundamental photon orbits, for which different branches exist, containing both stable and unstable orbits, with some of the latter not being shadow related. On the observational side, we show that current EHT constraints are compatible with all such BHs that could form from the growth of the superradiant instability of Kerr BHs. Unexpectedly, given the (roughly) 10% error bars in the EHT data — and in contrast to their scalar cousin model —, some of the BHs with up to 40% of their energy in their Proca hair are compatible with the current data. We estimate the necessary resolution of future observations to better constrain this model.pt_PT
dc.language.isoengpt_PT
dc.publisherIOP Publishingpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04106%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04106%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS-OUT%2F28407%2F2017/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/CERN%2FFIS-PAR%2F0027%2F2019/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS-AST%2F3041%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/CERN%2FFIS-PAR%2F0024%2F2021/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00099%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/POR_CENTRO/SFRH%2FBD%2F150788%2F2020/PTpt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectGR black holespt_PT
dc.subjectGravitypt_PT
dc.subjectModified gravitypt_PT
dc.titleKerr black holes with synchronised Proca hair: lensing, shadows and EHT constraintspt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.issue01pt_PT
degois.publication.titleJournal of Cosmology and Astroparticle Physics (JCAP)pt_PT
degois.publication.volume2023pt_PT
dc.identifier.doi10.1088/1475-7516/2023/01/047pt_PT
dc.identifier.essn1475-7516pt_PT
dc.identifier.articlenumber047pt_PT
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GGDG - Artigos
GGDG - Artigos

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