Spectroscopic Mode-Identification of y Doradus Stars

摘要

We are undertaking an extensive observational campaign of a number of non-radially pulsating stars using the high-resolution HERCULES spectrograph on the 1.0-m telescope at the Mt John University Observatory (MJUO). This paper outlines our campaign and presents preliminary results for one y Doradus star, HD40745, as an example. About 250 spectra of HD40745 have been obtained. We have used Wright's (2008) representative cross-correlation lineprofile technique to extract line profiles and these have then been analysed using the FAMIAS package (Zima 2008) to derive a spectroscopic mode identification.