The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations
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The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations

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The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations

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dc.contributor.author Floquet, M.
dc.contributor.author Hubert, A. M.
dc.contributor.author Huat, A. L.
dc.contributor.author Frémat, Y.
dc.contributor.author Janot-Pacheco, E.
dc.contributor.author Gutiérrez Soto, Juan
dc.contributor.author Neiner, C.
dc.contributor.author De Batz, B.
dc.contributor.author Leroy, B.
dc.contributor.author Poretti, E.
dc.contributor.author Amado, P.
dc.contributor.author Catala, C.
dc.contributor.author Rainer, M.
dc.contributor.author Díaz, D.
dc.contributor.author Uytterhoeven, K.
dc.contributor.author Andrade, L.
dc.contributor.author Diago Nebot, Pascual David
dc.contributor.author Emilio, M.
dc.contributor.author Espinosa-Lara, F.
dc.contributor.author Fabregat Llueca, Juan
dc.contributor.author Martayan, C.
dc.contributor.author Semaan, T.
dc.contributor.author Suso, J.
dc.date.accessioned 2015-10-14T18:02:47Z
dc.date.available 2015-10-14T18:02:47Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10550/47703
dc.description.abstract Context. We present spectroscopic ground-based observations of the early Be star HD 49330 obtained simultaneously with the CoRoT-LRA1 run just before the burst observed in the CoRoT data. Aims. Ground-based spectroscopic observations of the early Be star HD 49330 obtained during the precursor phase and just before the start of an outburst allow us to disantangle stellar and circumstellar contributions and identify modes of stellar pulsations in this rapidly rotating star. Methods. Time series analysis (TSA) is performed on photospheric line profiles of He i and Si iii by means of the least squares method. Results. We find two main frequencies f1 = 11.86 c d^−1 and f2 = 16.89 c d^−1 which can be associated with high order p-mode pulsations. We also detect a frequency f3 = 1.51 c d^−1 which can be associated with a low order g-mode. Moreover we show that the stellar line profile variability changed over the spectroscopic run. These results are in agreement with the results of the CoRoT data analysis, as shown in Huat et al. (2009). Conclusions. Our study of mid- and short-term spect roscopic variability allows the identification of p- and g- modes in HD 49330. It also allows us to display changes in the line profile variability before the start of an outburst. This brings new constraints for the seimic modelling of this star.
dc.language.iso eng
dc.relation.ispartof Astronomy and Astrophysics, 2009
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Floquet, M. Hubert, A.M. Huat, A.L. Frémat, Y. Janot-Pacheco, E. Gutiérrez Soto, Juan Neiner, C. De Batz, B. Leroy, B. Poretti, E. Amado, P. Catala, C. Rainer, M. Diaz, D. Uytterhoeven, K. Andrade, L. Diago Nebot, Pascual David M. Emilio Espinosa-Lara, F. Fabregat Llueca, Juan Bautista Martayan, C. Semaan, T. Suso, J. 2009 The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations Astronomy and Astrophysics
dc.subject Ciència Ensenyament
dc.subject Astronomia
dc.title The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-10-14T18:02:47Z
dc.identifier.idgrec 048714

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