000002115 001__ 2115
000002115 005__ 20160701171659.0
000002115 0247_ $$2DOI$$a10.1093/mnras/stu2615
000002115 037__ $$aASTROimport-272
000002115 100__ $$aBrunsden, E.
000002115 245__ $$aThe classification of frequencies in the γ Doradus/δ Scuti hybrid star HD 49434
000002115 260__ $$c2015
000002115 520__ $$aHybrid stars of the γ Doradus and δ Scuti pulsation types have great potential for asteroseismic analysis to explore their interior structure. To achieve this, mode identifications of pulsational frequencies observed in the stars must be made, a task which is far from simple. In this work we begin the analysis by scrutinizing the frequencies found in the CoRoT photometric satellite measurements and ground-based high-resolution spectroscopy of the hybrid star HD 49434. The results show almost no consistency between the frequencies found using the two techniques and no characteristic period spacings or couplings were identified in either data set. The spectroscopic data additionally show no evidence for any long-term (5 yr) variation in the dominant frequency. The 31 spectroscopic frequencies identified have standard deviation profiles suggesting multiple modes sharing (l, m) in the δ Scuti frequency region and several skewed modes sharing the same (l, m) in the γ Doradus frequency region. In addition, there is a clear frequency in the γ Doradus frequency region that appears to be unrelated to the others. We conclude HD 49434 remains a δ Scuti/γ Doradus candidate hybrid star but more sophisticated models dealing with rotation are sought to obtain a clear picture of the pulsational behaviour of this star. 
000002115 700__ $$a Pollard, K. R.
000002115 700__ $$a Cottrell, P. L.
000002115 700__ $$a Uytterhoeven, K.
000002115 700__ $$a Wright, D. J.
000002115 700__ $$a De Cat, P.
000002115 773__ $$c2970-2980$$i3$$pMonthly Notices of the Royal Astronomical Society$$v447$$y2015
000002115 85642 $$ahttp://esoads.eso.org/abs/2015MNRAS.447.2970B
000002115 905__ $$apublished in
000002115 980__ $$aREFERD