Central stars of mid-infrared nebulae discovered with Spitzer and WISE
  Searches for compact mid-IR nebulae with the Spitzer Space Telescope and the
Wide-field Infrared Survey Explorer (WISE), accompanied by spectroscopic
observations of central stars of these nebulae led to the discovery of many
dozens of massive stars at different evolutionary stages, of which the most
numerous are candidate luminous blue variables (LBVs). In this paper, we give a
census of candidate and confirmed Galactic LBVs revealed with Spitzer and WISE,
and present some new results of spectroscopic observations of central stars of
mid-IR nebulae.
