Dust temperatures are saved only for grains at an equilibrium temperature (not transiently heated), when the keyword
savetemp is used. The file name consists of the name of the dust component and a suffix given as the parameter of the
savetemp keyword. In case of 1D models, when also the keyword ascii is used, the result is a text file with rows containing
cell index, dust temperature [K]. For 3D models the temperatures are always written to binary files. The file simply contains a temperature value (4 byte float) for each cell.