Astrophysics and Space Science

, Volume 355, Issue 2, pp 333–341 | Cite as

Magnetic neutron stars in f(R) gravity

  • Artyom V. Astashenok
  • Salvatore Capozziello
  • Sergei D. Odintsov
Original Article


Neutron stars with strong magnetic fields are considered in the framework of f(R) gravity. In order to describe dense matter in magnetic field, the model with baryon octet interacting through σρω-fields is used. The hyperonization process results in softening the equation of state (EoS) and in decreasing the maximal mass. We investigate the effect of strong magnetic field in models involving quadratic and cubic corrections in the Ricci scalar R to the Hilbert–Einstein action. For large fields, the Mass–Radius relation differs considerably from that of General Relativity only for stars with masses close to the maximal one. Another interesting feature is the possible existence of more compact stable stars with extremely large magnetic fields (∼6×1018 G instead of ∼4×1018 G as in GR) in the central regions of the stars. Due to cubic terms, a significant increasing of the maximal mass is possible.


Magnetars Neutron stars Modified gravity 



This work is supported in part by projects 14-02-31100 (RFBR, Russia) (AVA), by MINECO (Spain), FIS2010-15640 and by MES project TSPU-139 (Russia) (SDO). SC is supported by INFN (iniziative specifiche TEONGRAV and QGSKY).


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Artyom V. Astashenok
    • 1
  • Salvatore Capozziello
    • 2
    • 3
    • 4
  • Sergei D. Odintsov
    • 5
    • 6
    • 7
    • 8
  1. 1.Institute of Physics and TechnologyI. Kant Baltic Federal UniversityKaliningradRussia
  2. 2.Dipartimento di FisicaUniversita’ di Napoli Federico IINapoliItaly
  3. 3.Istituto Nazionale di Fisica Nucleare (INFN) Sez. di NapoliCompl. Univ. di Monte S. Angelo, Ed. G.NapoliItaly
  4. 4.Gran Sasso Science Institute (INFN)L’AquilaItaly
  5. 5.Instituciò Catalana de Recerca i Estudis Avançats (ICREA)BarcelonaSpain
  6. 6.Institut de Ciencies de l’Espai (IEEC-CSIC)Campus UABBarcelonaSpain
  7. 7.Tomsk State Pedagogical UniversityTomskRussia
  8. 8.National Research Tomsk State UniversityTomskRussia

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