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Bayesian Evidence for Two Populations of White Dwarfs: Preliminary Results

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Autor(es):
Valentim, R. ; Romero, A. D. ; Kepler, S. . ; Horvath, J. E. ; Rangel, E. M. ; Tremblay, PE ; Gansicke, B ; Marsh, T
Número total de Autores: 8
Tipo de documento: Artigo Científico
Fonte: STARS WITH THE B[E] PHENOMENON, PROCEEDINGS; v. 509, p. 4-pg., 2017-01-01.
Resumo

White dwarf (WD) populations are analyzed using Bayesian tools, which allows inferring possible evolutionary paths through the study of the mass values. We employed a sample of 2761 DA white dwarf stars from the SDSS, and obtained the central mass values and their corresponding standard deviations using a bimodal population as an ansatz. The results indicate a population with M-1 = 0.60M(circle dot) and sigma(1) = 0.06M(circle dot), corresponding to a single stellar evolution, and a second population with M-2 = l.00M(circle dot) and sigma(1) = 0.11M(circle dot) possibly due to binary evolution resulting from mergers. (AU)

Processo FAPESP: 13/26258-4 - Matéria superdensa no universo
Beneficiário:Manuel Máximo Bastos Malheiro de Oliveira
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/08874-8 - 20th European White Dwarf Workshop
Beneficiário:Rodolfo Valentim da Costa Lima
Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior