| Abstract : | H II regions are the low-density clouds of ionized gas excited by massive stars (O, early B). The molecular clouds, associated with H II regions and young embedded clusters, serve as the ideal targets to probe the formation of stars as well as star clusters. Here, we identify and characterize the pre-main-sequence stars associated with the H II regions Sh2-87, which is located at a distance of ∼ 2.3 kpc and is a member of the Vulpecula OB association. We have utilized both the new spectroscopic observational data as well as several archival catalogues, e.g., IPHAS, WISE, 2MASS. Low-resolution spectroscopic observations revealed the presence of few massive (early-B) sources. Using the near-infrared colour excess, a numerous number of young population (20 Class I and 70 Class II) are identified, that suggest active star-formation activity toward this region. Additionally, the presence of a significant number (20) of Hα emitters indicates strong ionization activity. Thus using multi-wavelength datasets, an overall star formation activity will be presented here. |
