2007A&A...463..225A

This paper investigates the pulsational behavior of the exceptionally slow rotating δ Scuti star 44 Tau. During 2000 and 2003 we carried out a photometric observing campaign and obtained 470 h of Stroemgren photometry (v and y). We observed 29 pulsational frequencies, from which 16 linear combinations were detected. Amplitude variations were found to be significant for three frequencies. Furthermore a close frequency pair was derived. The pulsational constant Q has been calculated for all frequencies. The radial fundamental and the first overtone were identified based on Q and the positive phase shifts in all three observing seasons. Additionally we found evidence for the presence of g modes. The newly derived value of the projected rotational velocity of vsini=2±1km/s is discussed. Fast rotation can be excluded, but there are no evident proofs to favor slow rotation or pole-on view.