OPTIMus—Survey of Massive Star-Forming Regions at Optical, Infrared, and Millimeter Wavelengths

Abstract This work presents a description of the scientific goals and objectives of OPTIMus (OPTical, Infrared, Millimeter survey of massive star-forming regions), a survey of massive star-forming regions in the optical, infrared, and millimeter wavelengths. The survey is aimed at constructing a comprehensive characterization of the multicomponent and structurally complex interstellar medium in the vicinity of young massive stars combining both observational and theoretical aspects. Using multiwavelength observational data, we will reconstruct the three-dimensional structure and determine the physical parameters of H II regions, photodissociation regions, and the surrounding molecular clouds. The paper describes the observational data obtained with the 6-m BTA and Zeiss-1000 telescopes of the Special Astrophysical Observatory of the Russian Academy of Sciences, the 2.5-m telescope of the Caucasian Mountain Observatory of the Sternberg Astronomical Institute of Moscow State University, and the 20-m telescope of the Onsala Space Observatory.