Astrophobic Axions
  We propose a class of axion models with generation dependent Peccei-Quinn
charges for the known fermions that allow to suppress the axion couplings to
nucleons and electrons. Astrophysical limits are thus relaxed, allowing for
axion masses up to ${\cal O}(0.1)$ eV. The axion-photon coupling remains
instead sizeable, so that next generation helioscopes will be able to probe
this scenario. Astrophobia unavoidably implies flavor violating axion
couplings, so that experimental limits on flavour-violating processes can
provide complementary probes. The astrophobic axion can be a viable dark matter
candidate in the heavy mass window, and can also account for anomalous energy
loss in stars.
