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Hybrid stars of the {\gamma} Doradus and {\delta} Scuti pulsation types havegreat potential for asteroseismic analysis to explore their interior structure.To achieve this, mode identi- fications of pulsational frequencies observed inthe stars must be made, a task which is far from simple. In this work we beginthe analysis by scrutinizing the frequencies found in the CoRoT photometricsatellite measurements and ground-based high-resolution spectroscopy of thehybrid star HD 49434. The results show almost no consistency between thefrequencies found using the two techniques and no characteristic periodspacings or couplings were identified in either dataset. The spectroscopic dataadditionally show no evidence for any long term (5 year) variation in thedominant frequency. The 31 spectroscopic frequencies identified have standarddeviation profiles suggesting multiple modes sharing (l, m) in the {\delta}Scuti frequency region and several skewed modes sharing the same (l, m) in the{\gamma} Doradus frequency region. In addition, there is a clear frequency inthe {\gamma} Doradus frequency region that appears to be unrelated to theothers. We conclude HD 49434 remains a {\delta} Scuti/ {\gamma} Doraduscandidate hybrid star but more sophisticated models dealing with rotation aresought to obtain a clear picture of the pulsational behaviour of this star.

The classification of frequencies in the {\gamma} Doradus / {\delta} Scuti hybrid star HD 49434