Extragalactic H3O+: Some Consequences
  We discuss some implications of our recent detection of extragalactic H3O+: the location of the gas in M82, the origin of energetic radiation in M82, and the possible feedback effects of star formation on the cosmic ray flux in galaxies. 
Floris van der Tak (SRON Groningen, NL), Susanne Aalto (Onsala, S),   Rowin Meijerink (Berkeley, USA)