Setembro 2017 vol. 4 num. 1 - VIII Encontro Científico de Física Aplicada

Artigo Completo - Open Access.

Idioma principal

BETOCS using the 157 gold SNe Ia Data: Hubble is not humble

Colistete Jr., R.; Giostri, R.;

Artigo Completo:

The type Ia supernovae observational data is one of the most important in observational cosmology nowadays. Here we present the first public version of BETOCS (BayEsian Tools for Observational Cosmology using SNe Ia), which is a powerful and high productivity tool aimed to help the theoretical physicist community investigate cosmological models using type Ia supernovae (SNe Ia) observational data. BETOCS is applied to the generalized Chaplygin gas model (GCGM), traditional Chaplygin gas model (CGM) and LCDM, ranging from 5 to 3 free parameters, respectively. The “gold sample” of 157 supernovae data is used. It is shown that the Chaplygin gas scenario is viable (in most cases the LCDM is disfavoured) and the quartessence scenario (that unifies the description for dark matter and dark energy) is favoured. The Hubble parameter (H0) is important and should not be fixed and it can be estimated or marginalized with or without the Hubble Space Telescope prior.

Artigo Completo:

The type Ia supernovae observational data is one of the most important in observational cosmology nowadays. Here we present the first public version of BETOCS (BayEsian Tools for Observational Cosmology using SNe Ia), which is a powerful and high productivity tool aimed to help the theoretical physicist community investigate cosmological models using type Ia supernovae (SNe Ia) observational data. BETOCS is applied to the generalized Chaplygin gas model (GCGM), traditional Chaplygin gas model (CGM) and LCDM, ranging from 5 to 3 free parameters, respectively. The “gold sample” of 157 supernovae data is used. It is shown that the Chaplygin gas scenario is viable (in most cases the LCDM is disfavoured) and the quartessence scenario (that unifies the description for dark matter and dark energy) is favoured. The Hubble parameter (H0) is important and should not be fixed and it can be estimated or marginalized with or without the Hubble Space Telescope prior.

Palavras-chave: gravitation, general relativity, observational cosmology,

Palavras-chave: gravitation, general relativity, observational cosmology,

DOI: 10.5151/phypro-viii-efa-36

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Como citar:

Colistete Jr., R.; Giostri, R.; "BETOCS using the 157 gold SNe Ia Data: Hubble is not humble", p. 165-180 . In: . São Paulo: Blucher, 2017.
ISSN 2358-2359, DOI 10.5151/phypro-viii-efa-36

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