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Neutron stars in a perturbative f(R) gravity model with strong magnetic fields

dc.contributor.authorCheoun, Myung-Ki
dc.contributor.authorDeliduman, Cemsinan
dc.contributor.authorGungor, Can
dc.contributor.authorKeles, Vildan
dc.contributor.authorRyu, C. Y.
dc.contributor.authorKajino, Toshitaka
dc.contributor.authorMathews, Grant J.
dc.date.accessioned2025-01-09T20:12:09Z
dc.date.available2025-01-09T20:12:09Z
dc.date.issued2013
dc.identifier.issn1475-7516
dc.identifier.urihttps://doi.org/10.1088/1475-7516/2013/10/021
dc.identifier.urihttps://hdl.handle.net/20.500.14124/8434
dc.description.abstractIn Kaluza-Klein electromagnetism it is natural to associate modified gravity with strong electromagnetic fields. Hence, in this paper we investigate the combined effects of a strong magnetic field and perturbative f(R) gravity on the structure of neutron stars. The effect of an interior strong magnetic field of about 10(17-18) G on the equation of state is derived in the context of a quantum hadrodynamics (QHD) equation of state (EoS) including effects of the magnetic pressure and energy along with occupied Landau levels. Adopting a random orientation of interior field domains, we solve the modified spherically symmetric hydrostatic equilibrium equations derived for a gravity model with f(R) = R + alpha R-2. Effects of both the finite magnetic field and the modified gravity are detailed for various values of the magnetic field and the perturbation parameter a along with a discussion of their physical implications. We show that there exists a parameter space of the modified gravity and the magnetic field strength, in which even a soft equation of state can accommodate a large (>2 M-circle dot) maximum neutron star mass.en_US
dc.description.sponsorshipUS Department of Energy [DE-SC0010137]; US National Science Foundation [PHY-1342611]; National Research Foundation of Korea [20110003188, 2011-0015467, 2012M7A1A2055605]; JSPS [20244035]; Ministry of Education, Science and Culture of Japan [20244035, 21540412]; Scientific Research on Innovative Area of MEXT [20105004]; Heiwa Nakajima Foundation; U.S. Department of Energy under Nuclear Theory Grant [DE-FG02-95-ER40934]; Grants-in-Aid for Scientific Research [21540412] Funding Source: KAKENen_US
dc.description.sponsorshipC.D. thanks K. Y. Eksi for valuable discussions and pointing out the last reference. C.D. also thanks The National Astronomical Observatory of Japan for hospitality where collaboration for this work started. M.-K.C., C.D. and T.K. would like to thank CETUP* (Center for Theoretical Underground Physics and Related Areas), supported by the US Department of Energy under Grant No. DE-SC0010137 and by the US National Science Foundation under Grant No. PHY-1342611, for its hospitality and partial support during the 2013 Summer Program. This work was supported by the National Research Foundation of Korea (20110003188, 2011-0015467 and 2012M7A1A2055605), and also supported in part by Grants-in-Aid for Scientific Research of JSPS (20244035). This work was also supported by the Grants-in-Aid for the Scientific Research from the Ministry of Education, Science and Culture of Japan (20244035, 21540412), Scientific Research on Innovative Area of MEXT (20105004), and Heiwa Nakajima Foundation. Work at the University of Notre Dame (G.J.M.) supported by the U.S. Department of Energy under Nuclear Theory Grant DE-FG02-95-ER40934.en_US
dc.language.isoengen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectmodified gravityen_US
dc.subjectmagnetic fieldsen_US
dc.subjectneutron starsen_US
dc.subjectmassive starsen_US
dc.titleNeutron stars in a perturbative f(R) gravity model with strong magnetic fieldsen_US
dc.typearticleen_US
dc.authoridDeliduman, Cemsinan/0000-0002-4241-4426
dc.authoridGungor, Can/0000-0003-3791-3754
dc.authoridCheoun, Myung-Ki/0000-0001-7810-5134
dc.departmentMimar Sinan Güzel Sanatlar Üniversitesien_US
dc.identifier.doi10.1088/1475-7516/2013/10/021
dc.identifier.issue10en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.wosqualityQ1
dc.identifier.wosWOS:000326979500021
dc.identifier.scopus2-s2.0-84887680934
dc.identifier.scopusqualityQ1
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.snmzKA_20250105


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