Napaporn A-thano (Institute of Astronomy, National Tsing Hua University, Hsinchu 30013, Taiwan); Ing-Guey Jiang (Institute of Astronomy, National Tsing Hua University, Hsinchu 30013, Taiwan); David Mkrtichian (National Astronomical Research Institute of Thailand, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand); Stevanus K. Nugroho (School of Mathematics and Physics, Queen’s University Belfast, University Road, Belfast BT7 1NN, UK); Hajime Kawahara (Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan ; Research Center for the Early Universe, School of Science, The University of Tokyo, Tokyo 113–0033, Japan)
We present the results of the study of pulsation line-profile variations of exoplanet host A-type Delta-Scuti star WASP-33. The high-resolution spectroscopic observations were taken in 2015 using the High Dispersion Spectrograph (HDS) of the Subaru 8.2-meter telescope. Least-Squares Deconvolution (LSD) technique was used to construct a mean profile and enhance the S/N. The analysis of LSD profiles shows the existence of high-degree prograde non-radial pulsation. We discuss these obtained results together with the results of the photometric studies of the pulsation spectrum.