Galactic Habitability Re-Examined: Indications of Bimodality
  The problem of the extent of habitable zones in different kinds of galaxies
is one of the outstanding challenges for contemporary astrobiology. In the
present study, we investigate habitability in a large sample of simulated
galaxies from the Illustris Project in order to at least roughly quantify the
hospitality to life of different galactic types. The pioneering study of Dayal
et al. (2015) is critically examined and some of its results are amended. In
particular, we find a tentative evidence for a second mode of galactic
habitability comprising metal-rich dwarfs similar to IC 225, LMC or M32. The
role of the galactic environment and the observation selection effects is
briefly discussed and prospects for further research on the topic outlined.
