A multisite photometric campaign on the pre-main-sequence delta Scuti pulsator IP Persei

We present the results of a photometric multisite campaign on the delta 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 t...

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Detalles Bibliográficos
Autores: Ripepi, V, Bernabei, S, Marconi, M, Palla, F, Ferro, AA, Bonanno, A, Ferrara, P, Frasca, A, Jiang, XJ, Kim, SL, Marinoni, S, Mignemi, G, Monteiro, MJPFG, Oswalt, TD, Reegen, P, Janulis, R, Rolland, A, Ruoppo, A, Terranegra, L, Zwintz, K, Rodríguez, E
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:México
Institución:Universidad Nacional Autónoma de México
Repositorio:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/1342
Acceso en línea:http://hdl.handle.net/11154/1342
Access Level:acceso abierto
Palabra clave:Astronomy & Astrophysics
stars : variables : delta Scuti
stars : oscillations
stars : pre-main sequence
stars : fundamental parameters
stars : individual : IP Persei
Descripción
Sumario:We present the results of a photometric multisite campaign on the delta 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).

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