The optical surface brightness (SB) has been coded (see KK98): high (H), low (L), very low (VL), and extremely low (EL) in Col. 7. The total blue magnitude and its reference follow in Cols. 8 and 9. "NED'' - data are from the NASA/Extragalactic Database, "IK'' - visual estimates from POSS (typical error is about 0.4 mag) by I. Karachentsev, "6 m'' - accurate photometric data from the 6-m telescope CCD-frames obtained by Karachentsev and coworkers (unpublished); "UH'' - photometric data from U. Hopp (Calar Alto) unpublished. The Galactic extinction follows in Col. 10. Other names (identifications) are listed in Col. 11.
Results of the HI observations are summarized in Table 2. The kk-number is given in Col. 1, the HI-flux [Jykms-1] follows in Col. 2, the maximum emission and/or the rms noise [mJy] in Col. 3, the heliocentric radial velocity plus error in Col. 4, the line widths at the 50%, the 25%, and the 20% level of the peak emission in Col. 5. Distances (Col. 6) have been derived with different methods, there are photometric distances in some cases, in other cases the group membership yields a distance. If no other distance estimate is available, we assumed a Hubble constant of 75 kms-1 Mpc-1 to derive a "kinematic'' distance. The absolute magnitude is given in Col. 7, the integrated HI mass (Col. 8) was calculated as (e.g. Roberts 1969)
In a number of cases emission at negative radial velocities has been observed (kk 20, kk 236, kk 237; only kk 236 has been plotted as an example). The Dwingeloo HI survey (Hartmann & Burton 1997) has been consulted: in all cases of negative radial velocities extended HI emission was found suggesting that we observed high velocity clouds in our Galaxy.
|Figure 4: The histogram shows the number of galaxies per velocity interval of 200 kms-1. The distribution of corrected radial velocities (v0) of our galaxy sample demonstrates the local character of these galaxies|
|Figure 5: The distribution of the optical linear diameter A0 in kpc for the whole sample in the de Vaucouleurs (D25) system is given here. Galaxies within 10 Mpc (i.e. within the Local Volume) are shown by shaded areas. The medium value for the shaded areas is kpc|
Copyright The European Southern Observatory (ESO)