The problem of the determination of distances 2.2 The problem of spatial distribution 2 Distribution of galaxies within 100 Mpc Explosions of supernovae and mergings of binary massive compact objects are very rare in our Galaxy. Hence, only observations of many galaxies are expected to yield a reasonable detection rate. From the Lyon-Meudon extragalactic database LEDA we extracted a sample of 33557 nearby galaxies within 100 Mpc.
Some prominent structures appear.
The most efficient method consists of using the radial velocity together with a given Hubble constant. However, the determination of the Hubble constant is still controversial. Most of the difficulties come from the treatment of statistical biases. The smaller the value, the more difficult is GW detection due to larger distances to GW sources. The fractal dimension of the spatial distribution is close to .