## 1. IntroductionFG Vir (=HD 106384) is a Scuti
variable near the end of its main-sequence evolution. 435 hours of
photometric measurements by the Delta Scuti Network determined 24
statistically significant frequencies from 9.20 to 34.12 c/d (106
to 395 The pulsation mode indentification from observed frequencies requires accurate determinations of the basic parameters of the star. From the available photometry, Mantegazza et al. (1994) derived K and . A correction for a misprint in the literature leads to a correction of to 3.9. We can now improve these values further by including the accurate Hipparcos parallax which predicts mag. This is slightly fainter than the value of mag predicted by photometry. This leads to a corresponding shift in to 4.00. These values are in exact agreement with those derived by Viskum et al. (1998). We estimate the uncertainties to be K in temperature and in . The values of the pulsation constants The constant, -6.456, in the above formula is based on solar values
of mag, mag,
K and . If the The corresponding
© European Southern Observatory (ESO) 1999 Online publication: November 26, 1998 |