Print Email Facebook Twitter A test of unification towards the radio source PKS1413+135 Title A test of unification towards the radio source PKS1413+135 Author Ferreira, M.C. Juliao, M.D. Martins, C.J.A.P, Monteiro, A.M.R.V.L. Faculty Applied Sciences Department Department of Applied Physics Date 2013-05-28 Abstract We point out that existing astrophysical measurements of combinations of the fine-structure constant ?, the proton-to-electron mass ratio ? and the proton gyromagnetic ratio gpgp towards the radio source PKS1413+135 can be used to individually constrain each of these fundamental couplings. While the accuracy of the available measurements is not yet sufficient to test the spatial dipole scenario, our analysis serves as a proof of concept as new observational facilities will soon allow significantly more robust tests. Moreover, these measurements can also be used to obtain constraints on certain classes of unification scenarios, and we compare the constraints obtained for PKS1413+135 with those previously obtained from local atomic clock measurements. Subject cosmologyfundamental couplingsunification scenariosastrophysical observationsPKS1413+135 To reference this document use: http://resolver.tudelft.nl/uuid:bb83a404-6b71-45a7-b24f-abbcfc4bb60b DOI https://doi.org/10.1016/j.physletb.2013.05.055 Publisher Elsevier ISSN 0370-2693 Source Physics Letters B, 724 (1-3), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 Elsevier Files PDF Monteiro_2013.pdf 658.34 KB Close viewer /islandora/object/uuid:bb83a404-6b71-45a7-b24f-abbcfc4bb60b/datastream/OBJ/view