Spectroscopic pulsational frequency identification and mode determination of γ Doradus star HD 12901.

ABSTRACT Using multisite spectroscopic data collected from three sites, the frequencies and pulsational modes of the γ Doradus star HD 12901 were identified. A total of six frequencies in the range 1-2 d⁻¹ were observed, their identifications supported by multiple line-profile measurement techniques and previously published photometry. Five frequencies were of sufficient signal-to-noise ratio for mode identification, and all five displayed similar three-bump standard deviation profiles which were fitted well with ( l, m) = (1,1) modes. These fits had reduced χ² values of less than 18. We propose that this star is an excellent candidate to test models of non-radially pulsating γ Doradus stars as a result of the presence of multiple (1,1) modes. [ABSTRACT FROM AUTHOR]