Axino dark matter with R-parity violation and 130 GeV gamma-ray line
  We show that decaying axino dark matter with R-parity violation can explain
the observed excess of the 130GeV gamma-ray line from the Galactic center in
the Fermi data. The branching fraction of the axino decay into monochromatic
photons can be O(1), and constraints from continuum gamma-rays and the
anti-proton flux are ameliorated. The Peccei-Quinn scale of
$O(10^{13}-10^{14})$\,GeV and the R-parity violation parameter of
$O(10^{-12}-10^{-11})$ are cosmologically favored.
