All Tables

Table 1: Journal of TBL observations of $\omega$ Ori obtained in December 2001. Column 1 indicates the number of the polarimetric sets. Columns 2 and 3 show the day and time of the beginning of observations. Column 4 indicates how many polarimetric sets or individual subexposures were obtained.
Table 2: Journal of IUE observations of $\omega$ Ori obtained in February 1996. Column 1 indicates the number of the spectrum in the IUE archives. Column 2 gives the exposure time. The Heliocentric Julian Date (HJD) minus 2 450 000 at mid-exposure is given in Col. 3.
Table 3: Frequencies detected in the three sets of data for each studied line. The He I 6678 and Mg II 4481 lines are outside the wavelength range of the Musicos spectrograph, and therefore not studied in 2001.
Table 4: Determined values of $v \sin~i$ (km s^-1) for the C II 4267, Mg II 4481 and Si III lines obtained in 1999 using the Fourier transform analysis, compared to the values given by B01 for the same data and by N02 for the data obtained in 1998.
Table 5: Stellar parameters of $\omega$ Ori obtained by fitting hydrogen and helium lines.
Table 6: Chemical composition of $\omega$ Ori compared to the mean chemical composition of B stars, as derived by Gies & Lambert (1992) and of local B stars, as derived by Gummersbach et al. (1998). The logarithmic abundances $\log$ ( $\epsilon _N/\epsilon _{\odot }$ ) are given relatively to the solar values compiled by Grevesse & Sauval (1998).