Domains of radiatively driven mass loss in the spectroscopic Hertzsprung-Russell diagram. The domains were derived from the balance of gravity and radiative force using the OSTAR2002 and BSTAR2006 static model atmosphere grids (Lanz & Hubeny 2003, 2007, respectively). In this diagram, . The red domain denotes parameters where the hydrostatic photosphere is possible, the filled yellow region indicates the parameters where the hydrostatic photosphere is possible and the radiative force overcomes gravity only in the last point of model photosphere, and the blue area corresponds to the parameters where the hydrostatic photosphere is impossible. The white area in the right and bottom parts of the figure reflects no corresponding models exist in the static modelatmosphere grids used. The blue crosses denote locations of wind models from Table 1 and Krtička (2014). The solar-metallicity evolutionary tracks of Ekström et al. (2012) are overplotted.