In this paper we present results of a 21-cm line search for candidate dwarf galaxies out to = 3970 km s-1 in a 6000 square degree area centered to RA [14h, 23h30], including the Local Void, taken from a list of Karachentseva et al. (1999). Ideas of biased galaxy formation (Dekel & Silk 1986) would expect dwarf galaxies to be less concentrated compared to the distribution of more massive galaxies.
|Figure 1: H I profiles observed with the 100-m radio telescope at Effelsberg which has a HPBW of 9 3. The flux scale is in Jy, the heliocentric radial velocity (optical convention) in kms-1. Observations were obtained in the total power mode [ON-OFF] which yields a residual of the Local H I emission around 0 kms-1. The profiles are arranged in ascending RA starting at the bottom left corner|
The Local Void is an ideal field for this kind of search as it is very close and only here, at such small distances we do have the sensitivity to find tiny dwarf galaxies at all, both optically and in the 21-cm line of neutral hydrogen.
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