Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data
Abstract In this work, we investigate neutron stars (NS) in $$f(\mathtt {R,L_m})$$ f ( R , L m ) theory of gravity for the case $$f(\mathtt {R,L_m})= \mathtt {R}+ \mathtt {L_m}+ \sigma \mathtt {R}\mathtt {L_m}$$ f ( R , L m ) = R + L m + σ R L m , where $$\mathtt {R}$$ R is the Ricci scalar and $$\m...
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oai:doaj.org-article:f027e54509b640498b3bb870e5e0430a2021-11-21T12:09:50ZNeutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data10.1140/epjc/s10052-021-09785-31434-60441434-6052https://doaj.org/article/f027e54509b640498b3bb870e5e0430a2021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09785-3https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract In this work, we investigate neutron stars (NS) in $$f(\mathtt {R,L_m})$$ f ( R , L m ) theory of gravity for the case $$f(\mathtt {R,L_m})= \mathtt {R}+ \mathtt {L_m}+ \sigma \mathtt {R}\mathtt {L_m}$$ f ( R , L m ) = R + L m + σ R L m , where $$\mathtt {R}$$ R is the Ricci scalar and $$\mathtt {L_m}$$ L m the Lagrangian matter density. In the term $$\sigma \mathtt {R}\mathtt {L_m}$$ σ R L m , $$\sigma $$ σ represents the coupling between the gravitational and particles fields. For the first time the hydrostatic equilibrium equations in the theory are solved considering realistic equations of state and NS masses and radii obtained are subject to joint constrains from massive pulsars, the gravitational wave event GW170817 and from the PSR J0030+0451 mass-radius from NASA’s Neutron Star Interior Composition Explorer (NICER) data. We show that in this theory of gravity, the mass-radius results can accommodate massive pulsars, while the general theory of relativity can hardly do it. The theory also can explain the observed NS within the radius region constrained by the GW170817 and PSR J0030+0451 observations for masses around $$1.4~M_{\odot }$$ 1.4 M ⊙ .R. V. LobatoG. A. CarvalhoC. A. BertulaniSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-7 (2021) |
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DOAJ |
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DOAJ |
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EN |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 R. V. Lobato G. A. Carvalho C. A. Bertulani Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| description |
Abstract In this work, we investigate neutron stars (NS) in $$f(\mathtt {R,L_m})$$ f ( R , L m ) theory of gravity for the case $$f(\mathtt {R,L_m})= \mathtt {R}+ \mathtt {L_m}+ \sigma \mathtt {R}\mathtt {L_m}$$ f ( R , L m ) = R + L m + σ R L m , where $$\mathtt {R}$$ R is the Ricci scalar and $$\mathtt {L_m}$$ L m the Lagrangian matter density. In the term $$\sigma \mathtt {R}\mathtt {L_m}$$ σ R L m , $$\sigma $$ σ represents the coupling between the gravitational and particles fields. For the first time the hydrostatic equilibrium equations in the theory are solved considering realistic equations of state and NS masses and radii obtained are subject to joint constrains from massive pulsars, the gravitational wave event GW170817 and from the PSR J0030+0451 mass-radius from NASA’s Neutron Star Interior Composition Explorer (NICER) data. We show that in this theory of gravity, the mass-radius results can accommodate massive pulsars, while the general theory of relativity can hardly do it. The theory also can explain the observed NS within the radius region constrained by the GW170817 and PSR J0030+0451 observations for masses around $$1.4~M_{\odot }$$ 1.4 M ⊙ . |
| format |
article |
| author |
R. V. Lobato G. A. Carvalho C. A. Bertulani |
| author_facet |
R. V. Lobato G. A. Carvalho C. A. Bertulani |
| author_sort |
R. V. Lobato |
| title |
Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| title_short |
Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| title_full |
Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| title_fullStr |
Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| title_full_unstemmed |
Neutron stars in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from NICER data |
| title_sort |
neutron stars in $$f(\mathtt {r,l_m})$$ f ( r , l m ) gravity with realistic equations of state: joint-constrains with gw170817, massive pulsars, and the psr j0030+0451 mass-radius from nicer data |
| publisher |
SpringerOpen |
| publishDate |
2021 |
| url |
https://doaj.org/article/f027e54509b640498b3bb870e5e0430a |
| work_keys_str_mv |
AT rvlobato neutronstarsinfmathttrlmfrlmgravitywithrealisticequationsofstatejointconstrainswithgw170817massivepulsarsandthepsrj00300451massradiusfromnicerdata AT gacarvalho neutronstarsinfmathttrlmfrlmgravitywithrealisticequationsofstatejointconstrainswithgw170817massivepulsarsandthepsrj00300451massradiusfromnicerdata AT cabertulani neutronstarsinfmathttrlmfrlmgravitywithrealisticequationsofstatejointconstrainswithgw170817massivepulsarsandthepsrj00300451massradiusfromnicerdata |
| _version_ |
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