Magnetic Fields of Chemically Peculiar Star in Clusters Trumpler 37, NGC 2281, and Melotte 111

We continue to search for and analyze magnetic fields of chemically peculiar stars in open clusters of different ages. The paper presents the analysis of the star clusters Trumpler 37, NGC 2281, and Melotte 111. The observed data were obtained using the Main Stellar Spectrograph mounted on the 6-m telescope of SAO RAS. No CP stars were found in the Trumpler 37 cluster: all six candidates turned out to be non-magnetic stars with strong emission lines in their spectra. In NGC 2281, we observed only two stars, HD 49040 and HD 49363. Several magnetic stars with weak fields were discovered in the Melotte 111 cluster. As a result, we did not find stars with a strong (more than 1 kG) longitudinal magnetic field in any of the studied clusters.