Stellar halos from The Dragonfly Edge-on Galaxies Survey
  We present the primary results from the Dragonfly Edge-on Galaxies Survey
(DEGS), an exploration of the stellar halos of twelve nearby ($d < 25$ Mpc)
edge-on disc galaxies with the Dragonfly Telephoto Array. The edge-on
orientation of these galaxies allows their stellar halos to be explored with
minimal obscuration by or confusion with the much brighter disc light. Galaxies
in the sample span a range of stellar masses from $10^{9.68} - 10^{10.88}
M_\odot$. We confirm that the wide range of stellar halo mass fractions
previously seen for Milky Way-mass galaxies is also found among less massive
spiral galaxies. The scatter in stellar halo mass fraction is large but we do
find a significant positive correlation between stellar halo mass fraction and
total stellar mass when the former is measured beyond five half-mass radii.
Reasonably good agreement is found with predictions from cosmological
hydrodynamical simulations, although observed stellar halo fractions appear to
be somewhat lower than expected from these simulations.
