Poster (Scientific congresses and symposiums)
Spectral Modelling with Interaction Effect of the Binary System Spica
Palate, Matthieu; Koenigsberger, G.; Harrington, D. et al.
2013Massive Stars: From α to Ω
 

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Abstract :
[en] Massive binary systems are crucial to improve our knowledge of the fundamental properties of massive stars, and synthetic spectra modelling with theoretical stellar atmospheres is commonly used in deriving some of these properties. However, the current stellar atmosphere models are designed for single spherical stars and therefore neglect interaction effects that occur in close binaries. We have developed a combined model that uses the TIDES code for computing the surface and the velocity field and the CoMBiSpeC model for the synthetic spectrum computation. This 2-in-1 model allows us to account for the interactions between the stars. We can now simulate the impact of the binarity on the spectra and refine the physical parameters of the binary systems. This model is presented here through the example of the spectral computation of Spica. In this particular system, the strongest effects due to the binarity appear in the line profile variations and the shape of the radial velocity curve.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Palate, Matthieu ;  Université de Liège - ULiège
Koenigsberger, G.;  Instituto de Ciencias Fisicas, Mexico
Harrington, D.;  Institute for Astronomy, University of Hawaii
Rauw, Grégor  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales
Moreno, E.;  Instituto de Ciencias Fsicas, Mexico)
Language :
English
Title :
Spectral Modelling with Interaction Effect of the Binary System Spica
Publication date :
01 June 2013
Event name :
Massive Stars: From α to Ω
Event date :
10-14 June 2013
Audience :
International
Available on ORBi :
since 15 October 2013

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