2 Basic data

Table 1 contains the identification data on the 8 systems: IDS (1900) index, ADS number (Aitken 1932), HD or BD number, Hipparcos number (ESA 1997), and other identifiers, e.g. double star discoverer codes. The ADS number happens to be a common identifier for all these systems and it will be used throughout this paper.

Basic data on system components (spectral types, visual magnitudes and B-V colors) are given in the left columns of Table 2 and were collected from the literature or from SIMBAD. Most of the photometry is taken from Tycho catalogue (ESA 1997). Proper motions and trigonometric parallaxes are taken from Hipparcos catalogue for all but 2 systems. The last 4 columns of Table 2 summarize the results of our study and contain the mean radial velocities, the number of measurements, the mean equivalent widths EW of the cross-correlation (CC) dip, and the projected axial rotational velocities $V\sin i$, as found from the width of CC dip. The method of $V\sin i$determination and the dependence of EW on B-V color and metallicity are described in Paper I and in (Tokovinin 1990). Parameters of CC dip and the number of measurements are given separately for both components of the double-lined systems.

  

Table 1: Object identification

  

Table 2: Basic observational data