Dark matter as a scalar field: theoretical and observational aspects

Autor: Escobal, Anderson Almeida
Přispěvatelé: Universidade Estadual Paulista (Unesp), Jesus, José Fernando de, Pereira, Saulo Henrique [UNESP]
Jazyk: portugalština
Rok vydání: 2020
Předmět:
Zdroj: Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-28T05:16:08Z No. of bitstreams: 1 Dissertação de Mestrado Anderson Final.pdf: 3242550 bytes, checksum: 11fe232f5baa65e84f538c067ec48dbb (MD5) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-28T05:16:08Z No. of bitstreams: 1 Dissertação de Mestrado Anderson Final.pdf: 3242550 bytes, checksum: 11fe232f5baa65e84f538c067ec48dbb (MD5) Rejected by Pamella Benevides Gonçalves null (pamella@feg.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo:  Após apresentar o trabalho e realizar as correções da banca. Solicitar a ficha catalográfica http://www2.feg.unesp.br/#!/biblioteca/trabalho-conclusao-de-curso/ depois acrescentar ao trabalho após a folha de rosto. Agradecemos a Compreensão on 2020-04-28T19:47:19Z (GMT) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-28T05:16:08Z No. of bitstreams: 1 Dissertação de Mestrado Anderson Final.pdf: 3242550 bytes, checksum: 11fe232f5baa65e84f538c067ec48dbb (MD5) Rejected by Pamella Benevides Gonçalves null (pamella@feg.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo:  Após apresentar o trabalho e realizar as correções da banca. Solicitar a ficha catalográfica http://www2.feg.unesp.br/#!/biblioteca/trabalho-conclusao-de-curso/ depois acrescentar ao trabalho após a folha de rosto. Agradecemos a Compreensão on 2020-04-28T19:47:19Z (GMT) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-28T05:16:08Z No. of bitstreams: 1 Dissertação de Mestrado Anderson Final.pdf: 3242550 bytes, checksum: 11fe232f5baa65e84f538c067ec48dbb (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Rejected by Pamella Benevides Gonçalves null (pamella@feg.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo:  Após apresentar o trabalho e realizar as correções da banca. Solicitar a ficha catalográfica http://www2.feg.unesp.br/#!/biblioteca/trabalho-conclusao-de-curso/ depois acrescentar ao trabalho após a folha de rosto. Agradecemos a Compreensão on 2020-04-28T19:47:19Z (GMT) Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Submitted by Anderson Almeida Escobal (anderson.aescobal@gmail.com) on 2020-04-29T13:13:17Z No. of bitstreams: 1 DISSERTAÇÃO DE MESTRADO ANDERSON ALMEIDA ESCOBAL.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2020-04-30T18:37:20Z (GMT) No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Made available in DSpace on 2020-04-30T18:37:20Z (GMT). No. of bitstreams: 1 escobal_aa_me_guara.pdf: 3349744 bytes, checksum: 3052f3c4fd7d58c09177b155ec36a2a9 (MD5) Previous issue date: 2020-03-02 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Estudamos o campo escalar real como um possível candidato para explicar a matéria escura no universo. No contexto de um campo escalar livre com potencial quadrático, após encontrar as equações dinâmicas do modelo usamos os dados observacionais para limitar os parâmetros livres e assim encontrar um limite inferior para o valor da massa que foi da ordem de $10^{-34}$eV, esse valor está próximo ao encontrado por alguns autores. Não foi possível encontrar um limite superior para a massa da matéria escura do campo escalar combinando os dados de $H(z)$, SN Ia. Como verificado neste trabalho e observado em outros estudos, a matéria escura pode ser descrita por um campo escalar real. Em outra linha de pesquisa, usando um método estatístico não-paramétrico envolvendo os chamados Processos Gaussianos, obtivemos um valor do redshift de transição, $z_t$, de $z_t = 0.59^{+0.12}_{-0.11}$ para dados de $H(z)$ e $z_t= 0.683^{+0.11}_{-0.082}$ para dados de SNs Ia. We studied the real scalar field as a possible candidate to explain the dark matter in the universe. In the context of a free scalar field with quadratic potential, after finding the dynamic equations of the model we used the observational data to limit the free parameters and thus find a lower limit for the mass value that was in the order of 10−34 eV , this value is close to that found by some authors. It was not possible to find an upper limit for the mass of dark matter in the scalar field by combining the H(z) + SNe Ia data. As verified in this work and observed in other studies, dark matter can be described by a real scalar field. In another line of research, using a non-parametric statistical method involving the so-called Gaussian Processes, we obtained a value of the transition redshift, zt , of zt = 0.59+0.12 −0.11 for H(z) data and zt = 0.683+0.11 −0.082 for SNs Ia data. CAPES - 001
Databáze: OpenAIRE
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