  In this paper, the recently proposed mass dimension one fermionic field is
supposed to be responsible for the dark matter halo around galactic nuclei,
through the quantum degeneracy pressure effect of the field. It will be showed
that the mass-ratio relation for dwarf galaxies can be well explained for a
particle dark matter mass of about $100 - 200$eV. For a large galaxy, as Milky
Way, the observational data for rotation curve can be well reproduced for a
particle mass of about 23eV, with the addition of other substructures.
