A multisite photometric campaign on the Pre-Main-Sequence δ Scuti pulsator IP Persei

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

V. Ripepi (Autor) FCUP; S. Bernabei (Autor) Outra; M. Marconi (Autor) Outra; F. Palla (Autor) Outra; A. Arellano Ferro (Autor) Outra; A. Bonanno (Autor) Outra; P. Ferrara (Autor) Outra; A. frasca (Autor) Outra; A. Frasca (Autor) Outra; X.J. Jiang (Autor) Outra; S-L. Kim (Autor) Outra; S. Marinoni (Autor) Outra; G. Mignemi (Autor) Outra; Mário João P. F. G. Monteiro (Autor) FCUP; T.D. Oswalt (Autor) Outra; P. Reegen (Autor) Outra; R. Janulis (Autor) Outra; E. Rodriguez (Autor) Outra; A. Rolland (Autor) Outra; A. Ruoppo (Autor) Outra; L. Terranegra (Autor) Outra; K. Zwintz (Autor) Outra

Revista

Título: Journal of Molecular Liquids

Vol. 188

Páginas: 335-343

ISSN: 0167-7322

Editora: Elsevier

Indexação

ISI Web of Science

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Astronomia ; Ciências Físicas > Astronomia > Astrofísica ; Ciências Físicas

Outras Informações

Resumo (PT): We present the results of a photometric multisite campaign on the Scuti Pre-Main-Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 h of observations over 38 nights. Present data confirms the multiperiodic nature of this star and leads to the identification of at least nine pulsational frequencies. Comparison with the predictions of linear non-adiabatic radial pulsation models allowed us to identify only five of the nine observed frequencies, and to constrain the position of IP Per in the HR diagram. The latter is in good agreement with the empirical determination of the stellar parameters obtained by Miroshnichenko et al. (2001, A&A, 377, 854). An initial interpretation of the observed frequencies using the Aarhus non-radial pulsation code suggests that three frequencies could be associated with non-radial (l=2) modes. Finally, we present new evolutionary and pulsation models at lower metallicity (Z=0.008) to take into account the possibility that IP Per is metal deficient, as indicated by Miroshnichenko et al. (2001, A&A, 377, 854).

Abstract (EN): We present the results of a photometric multisite campaign on the Scuti Pre-Main-Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 h of observations over 38 nights. Present data confirms the multiperiodic nature of this star and leads to the identification of at least nine pulsational frequencies. Comparison with the predictions of linear non-adiabatic radial pulsation models allowed us to identify only five of the nine observed frequencies, and to constrain the position of IP Per in the HR diagram. The latter is in good agreement with the empirical determination of the stellar parameters obtained by Miroshnichenko et al. (2001, A&A, 377, 854). An initial interpretation of the observed frequencies using the Aarhus non-radial pulsation code suggests that three frequencies could be associated with non-radial (l=2) modes. Finally, we present new evolutionary and pulsation models at lower metallicity (Z=0.008) to take into account the possibility that IP Per is metal deficient, as indicated by Miroshnichenko et al. (2001, A&A, 377, 854).

Idioma: Inglês

Tipo (Avaliação Docente): Científica