Membership analysis of the region around Tr37 with Gaia

In this regard, Gaia-DR3 data and machine-learning tools are very useful for studying large star-forming complexes. In this work, we analyze the ~7.1deg^2^ area of one of our Galaxy's dominant feedback-driven star-forming complexes, i.e., the region around Trumpler 37.

Using the Gaussian mixture and random-forest classifier methods, we identify 1243 highly probable members in the complex, of which ~60% are new members and are complete down to the mass limit of ~0.1-0.2M_{sun}_. The spatial distribution of the stars reveals multiple clusters toward the complex, where the central cluster around the massive star HD 206267 reveals two subclusters. Of the 1243 stars, 152 have radial velocity, with a mean value of -16.41+/-0.72km/s.