- Spectropolarimetric study of the cool RV Tauri star R Scuti hal link

Auteur(s): Tessore B.(Corresp.), Lebre A., Morin J.

Conference: Semaine de l’Astrophysique Française (Toulouse, FR, 2015-06-02)
Actes de conférence: , vol. p.429 (2015)

Ref HAL: hal-01313039_v1
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With the spectropolarimeter Narval at TBL we have initiated in spring 2015 a 2-year campaign dedicated to a sample of cool and evolved stars including pulsating RV Tauri stars. We monitor net circular and linear polarisation in the spectral lines of R Scuti, the brightest of such variable targets. Our aim is to study the surface magnetic field and the linear polarisation associated with specific spectral lines. We confirm a definite detection of the surface magnetic field of R Sct, with an average longitudinal component {B_ℓ = 0.9 ± 0.5 G}. We also unveil our first results on linear polarisation.