B-type stars in NGC 6834

Additionally, 109 optical spectra for 89 stars in the cluster's region were obtained using the GMOS-MOS spectrograph. From the photometric data, we derive the foreground cluster color excess, E(B-V)=0.62. Through photometric diagrams, including traditional color-color and color-magnitude diagrams and those incorporating the reddening-free $Q$ parameter, we identify new stars with $H\alpha$ emission.

Spectral classification of 89 stars is achieved, along with estimations of basic physical parameters, and projected rotational velocities for 64 B-type stars. We identify five new Be stars: NGC 6834 3, 9, and 118 as cluster members, and NGC 6834 23 and 121 as non-members. The research contributes to a deeper understanding of the structure of NGC 6834 and its B-type star population.