Dwarf halos and ultralight dark matter model

Ultralight bosons with de Broglie wavelength ~1 kpc have been proposed as a model of dark matter (DM) which can potentially evade some problems on small scales (core-cusp, substructure). Here we investigate a dwarf DM halo evolution in a tidal field of a host halo taking into account the DM quantum tunneling. This process reduces the dwarf halo mass by tunneling it into the host halo. We demonstrate that, for a halo of a particular mass, the process is very sensitive to the dwarf's radial position. We argue that the observed distribution of satellites around Milky Way and Andromeda can strongly constrain and even rule out the ultralight DM model.