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Non-radial oscillations and global stellar properties of anisotropic compact stars using realistic equations of state

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Aquino Curi, Elvis J. ; Castro, Luis B. ; Flores, Cesar, V ; Lenzi, Cesar H.
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: EUROPEAN PHYSICAL JOURNAL C; v. 82, n. 6, p. 13-pg., 2022-06-14.

In this work, we have made a systematic study of how the gravitational wave frequency of the fundamental mode from compact stars is affected by anisotropic effects using realistic equations of state. Our study is an extension of the seminal research performed by Doneva [Phys Rev D 85:124023, 2012, https://doi.org/10.1103/PhysRevD.85 . 124023], where a polytropic equation of state was used. To achieve our objective, we considered compact stars which were built by using equations of state in the framework of a relativistic mean field theory for the case of hadronic stars and in the framework of the MIT model for the case of quark stars. In order to obtain some pertinent information that could give us the possibility to detect the anisotropy in compact stars, we also studied and analized the behaviour of various global stellar quantities, e.g., gravitational redshift, stellar mass, radius, among others. We concluded that the anisotropic effects can have important consequences, which are strongly related to the anisotropic parameter and the equation of state of high density matter. Additionally, a comparison with observational data has been made and we have shown that the anisotropic parameter X can be used as a tuning parameter to reproduce mass and radius observational data of neutron stars. (AU)

Processo FAPESP: 20/05238-9 - Diferentes abordagens no estudo da matéria fortemente interagente
Beneficiário:Odilon Lourenço da Silva Filho
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
Beneficiário:Brett Vern Carlson
Modalidade de apoio: Auxílio à Pesquisa - Temático