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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

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.citation	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.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.subject	Ciència Ensenyament
dc.subject	Astronomia
dc.title	The B0.5IVe CoRoT target HD 49 330. II. Spectroscopic ground-based observations
dc.type	journal article	es_ES
dc.date.updated	2015-10-14T18:02:47Z
dc.identifier.idgrec	048714
dc.rights.accessRights	open access	es_ES