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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tidal deformability of strange stars and the GW170817 event

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Lourenco, Odilon [1] ; Lenzi, Cesar H. [1] ; Dutra, Mariana [1] ; Ferrer, Efrain J. [2] ; de la Incera, Vivian [2] ; Paulucci, Laura [3] ; Horvath, J. E. [4]
Total Authors: 7
[1] DCTA, Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Univ Texas Rio Grande Valley, Dept Phys & Astron, Edinburg, TX 78539 - USA
[3] Univ Fed Abc, Av Estados 5001, BR-09210170 Santo Andre, SP - Brazil
[4] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508900 Sao Paulo, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Physical Review D; v. 103, n. 10 MAY 11 2021.
Web of Science Citations: 0

In this work we consider strange stars formed by quark matter in the color-flavor-locked (CFL) phase of color superconductivity. The CFL phase is described by a Nambu-Jona-Lasinio model with four-fermion vector and diquark interaction channels. The effect of the color superconducting medium on the gluons are incorporated into the model by including the gluon self-energy in the thermodynamic potential. We construct parametrizations of the model by varying the vector coupling G(V) and comparing the results to the data on tidal deformability from the GW170817 event, the observational data on maximum masses from massive pulsars such as the MSP J0740 + 6620, and the mass/radius fits to NICER data for PSR J003 + 0451. Our results point out to windows for the G(V) parameter space of the model, with and without gluon effects included, that are compatible with all these astrophysical constraints, namely, 0.21 < G(V)/G(S) < 0.4, and 0.02 < G(V)/G(S) < 0.1, respectively. We also observe a strong correlation between the tidal deformabilites of the GW170817 event and G(V). Our results indicate that strange stars cannot be ruled out in collisions of compact binaries from the structural point of view. (AU)

FAPESP's process: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems
Grantee:Brett Vern Carlson
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/26258-4 - Superdense matter in the universe
Grantee:Manuel Máximo Bastos Malheiro de Oliveira
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 20/05238-9 - Different approaches in the strongly interacting matter study
Grantee:Odilon Lourenço da Silva Filho
Support Opportunities: Regular Research Grants