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https://repositorio.ufrn.br/handle/123456789/30980| Título: | Spectroscopic and asteroseismic analysis of the secondary clump red giant HD 226808 |
| Autor(es): | Costa, Jefferson Soares da Moura, Bruno Lustosa de Beck, Paul G. Mauro, Maria Pia Di Almeida, Leandro de Duarte, Tharcisyo S. S. Coelho, Hugo R. Castro, Matthieu Sebastien Nascimento Júnior, José Dias do |
| Palavras-chave: | Spectroscopic;Asteroseismic |
| Data do documento: | 6-Mai-2020 |
| Editor: | IOP Publishing |
| Referência: | MOURA, Bruno Lustosa de; BECK, Paul G.; MAURO, Maria Pia di; ALMEIDA, Leandro de; DUARTE, Tharcisyo S. S.; COELHO, Hugo R.; COSTA, Jefferson S. da; CASTRO, Matthieu; NASCIMENTO, José-Dias do. Spectroscopic and Asteroseismic Analysis of the Secondary Clump Red Giant HD 226808. The Astrophysical Journal, [S.L.], v. 894, n. 1, p. 67-67, 6 maio 2020. Disponível em: https://iopscience.iop.org/article/10.3847/1538-4357/ab80c8. Acesso em: 07 out. 2020. http://dx.doi.org/10.3847/1538-4357/ab80c8. |
| Resumo: | In order to clarify the properties of the secondary clump star HD 226808 (KIC 5307747), we combined four years of data from Kepler space photometry with high-resolution spectroscopy of the High Efficiency and Resolution Mercator Échelle Spectrograph mounted on the Mercator telescope. The fundamental atmospheric parameters, radial velocities, rotation velocities, and elemental abundance for Fe and Li were determined by analyzing line strengths and fitting-line profiles, based on a 1D local thermodynamic equilibrium model atmosphere. Second, we analyzed a photometric light curve obtained by Kepler and we extracted asteroseismic data of this target using Lets Analysis, Use and Report of Asteroseismology, a new seismic tool developed for the study of evolved FGK solar-like stars. We determined the evolutionary status and effective temperature, surface gravity, metallicity, microturbulence, and chemical abundances for Li, Ti, Fe, and Ni for HD 226808, by employing spectroscopy, asteroseismic scaling relations, and evolutionary structure models built in order to match observed data. Our results also show that an accurate synergy between good spectroscopic analysis and asteroseismology can provide a jump toward understanding evolved stars |
| URI: | https://repositorio.ufrn.br/handle/123456789/30980 |
| ISSN: | 0004-637X 1538-4357 |
| Aparece nas coleções: | CCET - DFTE - Artigos publicados em periódicos ECT - Artigos publicados em periódicos |
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