Title : Effect of stellar rotation on oscillation frequencies Language : English Author, co-author : Ouazzani, R. M. [LESIA, Observatoire de Paris; , Université Pierre et Marie Curie] Goupil, M. J. [LESIA, Observatoire de Paris] Dupret, Marc-Antoine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >] Reese, D. [LESIA, Observatoire de Paris; Department of Applied Mathematics, University of Sheffield] Publication date : 1-Jul-2010 Journal title : Astrophysics & Space Science Volume : 328 Pages : 285-289 Audience : International ISSN : 0004-640X Keywords : [en] Stellar rotation ; Perturbative methods ; Splitting ; Differential rotation ; Stellar oscillation ; Beta CepheiAbstract : [en] We investigate whether the rotational splittings of β Cephei stars can give some clue about the existence of a differential rotation in latitude, and if they are contaminated by the cubic order effects of rotation on oscillation frequencies. We also study some properties of splitting asymmetries and axisymmetric mode frequencies which provide seismic constrains on the distortion of the star. We find that only non-perturbative methods are able to reproduce those two seismic characteristics within 0.01% error bars for stars when they rotate faster than 3.3% Ω [SUB] k [/SUB]. If error bars of 1% are acceptable, the threshold of validity of perturbative methods is extended to 10% Ω [SUB] k [/SUB].Permalink : http://hdl.handle.net/2268/75524 DOI : 10.1007/s10509-010-0307-0 Other URL : http://adsabs.harvard.edu/abs/2010Ap%26SS.328..285O 
