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Universe
Special Issues
Advances and Limitations of Modified Gravity
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Special Issue "Advances and Limitations of Modified Gravity"

A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Gravitation".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 914

Special Issue Editors

Dr. Geová Maciel De Alencar

E-Mail Website
Guest Editor
Departamento de Física, Campus do Pici, Universidade Federal do Ceará, Fortaleza 60455-760, CE, Brazil
Interests: modified gravity
Dr. Marcony Silva Cunha

E-Mail Website
Guest Editor
Departamento de Física, CCT, Universidade Estadual do Ceará, Fortaleza 60714-903, Brazil
Interests: classical and quantum field theory; quantum mechanics; modified theory of gravity; cosmology; black holes
Prof. Dr. Job Saraiva Furtado

E-Mail Website
Guest Editor
Departamento de Física, Universidade Federal do Cariri (UFCA), Av. Tenente Raimundo Rocha, Cidade Universitária, Juazeiro do Norte 63048-080, Brazil
Interests: classical and quantum field theory; finite temperature field theory; modified theories of gravity; black holes; wormholes; black strings; analogue models for gravity

Special Issue Information

Dear Colleagues,

Despite the enormous success of general relativity, some questions remain unanswered, such as problems related to dark energy, dark matter, inflation, and quantum description of gravity, among others. The new era of high-precision tests of general relativity, with LIGO, VIRGO, EHT, and JWST, has attracted renewed interest among the community in alternative theories of gravity. There are several modified theories of gravity proposed in the literature so far; thus, a Special Issue on the advances and limitations of modified theories of gravity is of great importance. This Special Issue will be hosted in an open access, peer-reviewed journal which publishes original and quality research on all aspects of gravitational physics and cosmology.

Dr. Geová Maciel De Alencar
Dr. Marcony Silva Cunha
Prof. Dr. Job Saraiva Furtado
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Universe is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (1 paper)

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Research

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Article
Neutron Stars in the Context of f(T,T) Gravity
by
Clésio E. Mota
,
Luis C. N. Santos
,
Franciele M. da Silva
,
César V. Flores
,
Iarley P. Lobo
and
Valdir B. Bezerra
Universe 2023, 9(6), 260; https://doi.org/10.3390/universe9060260 - 29 May 2023
Viewed by 476
Abstract
In this work, we investigate the existence of neutron stars (NS) in the framework of f(T,T) gravity, where T is the torsion tensor and T is the trace of the energy–momentum tensor. The hydrostatic equilibrium equations are obtained, [...] Read more.
In this work, we investigate the existence of neutron stars (NS) in the framework of f(T,T) gravity, where T is the torsion tensor and T is the trace of the energy–momentum tensor. The hydrostatic equilibrium equations are obtained, however, with p and ρ quantities passed on by effective quantities p¯ and ρ¯, whose mass–radius diagrams are obtained using modern equations of state (EoS) of nuclear matter derived from relativistic mean field models and compared with the ones computed by the Tolman–Oppenheimer–Volkoff (TOV) equations. Substantial changes in the mass–radius profiles of NS are obtained even for small changes in the free parameter of this modified theory. The results indicate that the use of f(T,T) gravity in the study of NS provides good results for the masses and radii of some important astrophysical objects, as, for example, the NS of low-mass X-ray binary in NGC 6397, the millisecond pulsar PSR J0740+6620 and the GW170817 event. In addition, radii results inferred from the Lead Radius Experiment (PREX-2) can also be described for certain parameter values. Full article
(This article belongs to the Special Issue Advances and Limitations of Modified Gravity)
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