4 Discussion

As can be seen from Table 1, among 78 galaxy candidates, 59 are not in previous lists. For the 8 galaxies with known radial velocities the median is +1690 km s^-1, which shows that they are actually dwarfs.

Considering the distribution of nearby galaxies in approximately the same sky region, Nakanishi et al. (1997) determined the position of the Local Void to be about RA = 21.0$^{\rm h}$, $D = +12\hbox{$^\circ$}$, which is 32$\hbox{$^\circ$}$ away from the above mentioned location. According to them the Local Void center corresponds to $V^{\rm h}$ = 2500 km s^-1. Apparently, we have here two different voids which are located near each other. To prevent confusions, we propose to call the nearest empty volume the "Hercules-Aquila Void", and the other one the "Pegasus-Delphinus Void".

Hoffman et al. (1992) have studied the Hercules-Aquila Void center in the HI line for low-mass gas clouds and HI- rich dwarf galaxies. None were found within 2200 km s^-1. For the mean Local Volume distance, $\sim$10 Mpc, a detection threshold in the HI line about 0.5 Jy km s^-1 corresponds to a hydrogen mass limit of 10⁷ solar masses.