5 Summary and conclusions

Five new candidate PNe have been discovered in the dwarf irregular galaxy Sextans B. This is a notable result considering the limited number of PNe known in the other dwarf galaxies of the LG. In fact, a total of four PNe are known in the dwarf spheroidal companions of the Milky Way: three PNe in Sagittarius (Walsh et al. 1997; Dudziak et al. 2000), and one in Fornax (Danziger et al. 1978). Another few PNe have been discovered in the dwarf companions of M 31, and one in NGC 6822 (Ciardullo et al. 1989; Jacoby & Ford 1986).

The number of candidate PNe detected in Sextans B is in good agreement with the PNe population size expected from stellar evolution models.